<para>
<literal>c</literal> = check constraint,
<literal>f</literal> = foreign key constraint,
+ <literal>n</literal> = not null constraint,
<literal>p</literal> = primary key constraint,
<literal>u</literal> = unique constraint,
<literal>t</literal> = constraint trigger,
PRIMARY KEY ( <replaceable class="parameter">column_name</replaceable> [, ... ] ) <replaceable class="parameter">index_parameters</replaceable> |
EXCLUDE [ USING <replaceable class="parameter">index_method</replaceable> ] ( <replaceable class="parameter">exclude_element</replaceable> WITH <replaceable class="parameter">operator</replaceable> [, ... ] ) <replaceable class="parameter">index_parameters</replaceable> [ WHERE ( <replaceable class="parameter">predicate</replaceable> ) ] |
FOREIGN KEY ( <replaceable class="parameter">column_name</replaceable> [, ... ] ) REFERENCES <replaceable class="parameter">reftable</replaceable> [ ( <replaceable class="parameter">refcolumn</replaceable> [, ... ] ) ]
- [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ] [ ON DELETE <replaceable class="parameter">referential_action</replaceable> ] [ ON UPDATE <replaceable class="parameter">referential_action</replaceable> ] }
+ [ MATCH FULL | MATCH PARTIAL | MATCH SIMPLE ] [ ON DELETE <replaceable class="parameter">referential_action</replaceable> ] [ ON UPDATE <replaceable class="parameter">referential_action</replaceable> ] |
+ NOT NULL <replaceable class="parameter">column_name</replaceable> [ NO INHERIT ]
+}
[ DEFERRABLE | NOT DEFERRABLE ] [ INITIALLY DEFERRED | INITIALLY IMMEDIATE ]
<phrase>and <replaceable class="parameter">table_constraint_using_index</replaceable> is:</phrase>
<title>Compatibility</title>
<para>
- The forms <literal>ADD</literal> (without <literal>USING INDEX</literal>),
+ The forms <literal>ADD COLUMN</literal>
<literal>DROP [COLUMN]</literal>, <literal>DROP IDENTITY</literal>, <literal>RESTART</literal>,
<literal>SET DEFAULT</literal>, <literal>SET DATA TYPE</literal> (without <literal>USING</literal>),
<literal>SET GENERATED</literal>, and <literal>SET <replaceable>sequence_option</replaceable></literal>
- conform with the SQL standard. The other forms are
+ conform with the SQL standard.
+ The form <literal>ADD <replaceable>table_constraint</replaceable></literal>
+ conforms with the SQL standard when the <literal>USING INDEX</literal> and
+ <literal>NOT VALID</literal> clauses are omitted and the constraint type is
+ one of <literal>UNIQUE</literal>, <literal>PRIMARY KEY</literal>
+ or <literal>REFERENCES</literal>.
+ The other forms are
<productname>PostgreSQL</productname> extensions of the SQL standard.
Also, the ability to specify more than one manipulation in a single
<command>ALTER TABLE</command> command is an extension.
[ CONSTRAINT <replaceable class="parameter">constraint_name</replaceable> ]
{ CHECK ( <replaceable class="parameter">expression</replaceable> ) [ NO INHERIT ] |
+ NOT NULL <replaceable class="parameter">column_name</replaceable> |
UNIQUE [ NULLS [ NOT ] DISTINCT ] ( <replaceable class="parameter">column_name</replaceable> [, ... ] ) <replaceable class="parameter">index_parameters</replaceable> |
PRIMARY KEY ( <replaceable class="parameter">column_name</replaceable> [, ... ] ) <replaceable class="parameter">index_parameters</replaceable> |
EXCLUDE [ USING <replaceable class="parameter">index_method</replaceable> ] ( <replaceable class="parameter">exclude_element</replaceable> WITH <replaceable class="parameter">operator</replaceable> [, ... ] ) <replaceable class="parameter">index_parameters</replaceable> [ WHERE ( <replaceable class="parameter">predicate</replaceable> ) ] |
constraint, and index names must be unique across all relations within
the same schema.
</para>
-
- <para>
- Currently, <productname>PostgreSQL</productname> does not record names
- for <literal>NOT NULL</literal> constraints at all, so they are not
- subject to the uniqueness restriction. This might change in a future
- release.
- </para>
</refsect2>
<refsect2>
return constrOid;
}
+/*
+ * Store a NOT NULL constraint for the given relation
+ *
+ * The OID of the new constraint is returned.
+ */
+static Oid
+StoreRelNotNull(Relation rel, const char *nnname, AttrNumber attnum,
+ bool is_validated, bool is_local, int inhcount,
+ bool is_no_inherit)
+{
+ int16 attNos;
+ Oid constrOid;
+
+ /* We only ever store one column per constraint */
+ attNos = attnum;
+
+ constrOid =
+ CreateConstraintEntry(nnname,
+ RelationGetNamespace(rel),
+ CONSTRAINT_NOTNULL,
+ false,
+ false,
+ is_validated,
+ InvalidOid,
+ RelationGetRelid(rel),
+ &attNos,
+ 1,
+ 1,
+ InvalidOid, /* not a domain constraint */
+ InvalidOid, /* no associated index */
+ InvalidOid, /* Foreign key fields */
+ NULL,
+ NULL,
+ NULL,
+ NULL,
+ 0,
+ ' ',
+ ' ',
+ NULL,
+ 0,
+ ' ',
+ NULL, /* not an exclusion constraint */
+ NULL,
+ NULL,
+ is_local,
+ inhcount,
+ is_no_inherit,
+ false);
+ return constrOid;
+}
+
/*
* Store defaults and constraints (passed as a list of CookedConstraint).
*
is_internal);
numchecks++;
break;
+
+ case CONSTR_NOTNULL:
+ con->conoid =
+ StoreRelNotNull(rel, con->name, con->attnum,
+ !con->skip_validation, con->is_local,
+ con->inhcount, con->is_no_inherit);
+ break;
+
default:
elog(ERROR, "unrecognized constraint type: %d",
(int) con->contype);
ParseNamespaceItem *nsitem;
int numchecks;
List *checknames;
+ List *nnnames;
ListCell *cell;
Node *expr;
CookedConstraint *cooked;
*/
numchecks = numoldchecks;
checknames = NIL;
+ nnnames = NIL;
foreach(cell, newConstraints)
{
Constraint *cdef = (Constraint *) lfirst(cell);
- char *ccname;
Oid constrOid;
- if (cdef->contype != CONSTR_CHECK)
- continue;
-
- if (cdef->raw_expr != NULL)
+ if (cdef->contype == CONSTR_CHECK)
{
- Assert(cdef->cooked_expr == NULL);
+ char *ccname;
/*
- * Transform raw parsetree to executable expression, and verify
- * it's valid as a CHECK constraint.
+ * XXX Should we detect the case with CHECK (foo IS NOT NULL) and
+ * handle it as a NOT NULL constraint?
*/
- expr = cookConstraint(pstate, cdef->raw_expr,
- RelationGetRelationName(rel));
- }
- else
- {
- Assert(cdef->cooked_expr != NULL);
+
+ if (cdef->raw_expr != NULL)
+ {
+ Assert(cdef->cooked_expr == NULL);
+
+ /*
+ * Transform raw parsetree to executable expression, and
+ * verify it's valid as a CHECK constraint.
+ */
+ expr = cookConstraint(pstate, cdef->raw_expr,
+ RelationGetRelationName(rel));
+ }
+ else
+ {
+ Assert(cdef->cooked_expr != NULL);
+
+ /*
+ * Here, we assume the parser will only pass us valid CHECK
+ * expressions, so we do no particular checking.
+ */
+ expr = stringToNode(cdef->cooked_expr);
+ }
/*
- * Here, we assume the parser will only pass us valid CHECK
- * expressions, so we do no particular checking.
+ * Check name uniqueness, or generate a name if none was given.
*/
- expr = stringToNode(cdef->cooked_expr);
- }
+ if (cdef->conname != NULL)
+ {
+ ListCell *cell2;
- /*
- * Check name uniqueness, or generate a name if none was given.
- */
- if (cdef->conname != NULL)
- {
- ListCell *cell2;
+ ccname = cdef->conname;
+ /* Check against other new constraints */
+ /* Needed because we don't do CommandCounterIncrement in loop */
+ foreach(cell2, checknames)
+ {
+ if (strcmp((char *) lfirst(cell2), ccname) == 0)
+ ereport(ERROR,
+ (errcode(ERRCODE_DUPLICATE_OBJECT),
+ errmsg("check constraint \"%s\" already exists",
+ ccname)));
+ }
- ccname = cdef->conname;
- /* Check against other new constraints */
- /* Needed because we don't do CommandCounterIncrement in loop */
- foreach(cell2, checknames)
- {
- if (strcmp((char *) lfirst(cell2), ccname) == 0)
- ereport(ERROR,
- (errcode(ERRCODE_DUPLICATE_OBJECT),
- errmsg("check constraint \"%s\" already exists",
- ccname)));
+ /* save name for future checks */
+ checknames = lappend(checknames, ccname);
+
+ /*
+ * Check against pre-existing constraints. If we are allowed
+ * to merge with an existing constraint, there's no more to do
+ * here. (We omit the duplicate constraint from the result,
+ * which is what ATAddCheckConstraint wants.)
+ */
+ if (MergeWithExistingConstraint(rel, ccname, expr,
+ allow_merge, is_local,
+ cdef->initially_valid,
+ cdef->is_no_inherit))
+ continue;
}
+ else
+ {
+ /*
+ * When generating a name, we want to create "tab_col_check"
+ * for a column constraint and "tab_check" for a table
+ * constraint. We no longer have any info about the syntactic
+ * positioning of the constraint phrase, so we approximate
+ * this by seeing whether the expression references more than
+ * one column. (If the user played by the rules, the result
+ * is the same...)
+ *
+ * Note: pull_var_clause() doesn't descend into sublinks, but
+ * we eliminated those above; and anyway this only needs to be
+ * an approximate answer.
+ */
+ List *vars;
+ char *colname;
+
+ vars = pull_var_clause(expr, 0);
+
+ /* eliminate duplicates */
+ vars = list_union(NIL, vars);
+
+ if (list_length(vars) == 1)
+ colname = get_attname(RelationGetRelid(rel),
+ ((Var *) linitial(vars))->varattno,
+ true);
+ else
+ colname = NULL;
- /* save name for future checks */
- checknames = lappend(checknames, ccname);
+ ccname = ChooseConstraintName(RelationGetRelationName(rel),
+ colname,
+ "check",
+ RelationGetNamespace(rel),
+ checknames);
+
+ /* save name for future checks */
+ checknames = lappend(checknames, ccname);
+ }
/*
- * Check against pre-existing constraints. If we are allowed to
- * merge with an existing constraint, there's no more to do here.
- * (We omit the duplicate constraint from the result, which is
- * what ATAddCheckConstraint wants.)
+ * OK, store it.
*/
- if (MergeWithExistingConstraint(rel, ccname, expr,
- allow_merge, is_local,
- cdef->initially_valid,
- cdef->is_no_inherit))
- continue;
+ constrOid =
+ StoreRelCheck(rel, ccname, expr, cdef->initially_valid, is_local,
+ is_local ? 0 : 1, cdef->is_no_inherit, is_internal);
+
+ numchecks++;
+
+ cooked = (CookedConstraint *) palloc(sizeof(CookedConstraint));
+ cooked->contype = CONSTR_CHECK;
+ cooked->conoid = constrOid;
+ cooked->name = ccname;
+ cooked->attnum = 0;
+ cooked->expr = expr;
+ cooked->skip_validation = cdef->skip_validation;
+ cooked->is_local = is_local;
+ cooked->inhcount = is_local ? 0 : 1;
+ cooked->is_no_inherit = cdef->is_no_inherit;
+ cookedConstraints = lappend(cookedConstraints, cooked);
}
- else
+ else if (cdef->contype == CONSTR_NOTNULL)
{
- /*
- * When generating a name, we want to create "tab_col_check" for a
- * column constraint and "tab_check" for a table constraint. We
- * no longer have any info about the syntactic positioning of the
- * constraint phrase, so we approximate this by seeing whether the
- * expression references more than one column. (If the user
- * played by the rules, the result is the same...)
- *
- * Note: pull_var_clause() doesn't descend into sublinks, but we
- * eliminated those above; and anyway this only needs to be an
- * approximate answer.
- */
- List *vars;
- char *colname;
-
- vars = pull_var_clause(expr, 0);
+ CookedConstraint *nncooked;
+ AttrNumber colnum;
+ char *nnname;
- /* eliminate duplicates */
- vars = list_union(NIL, vars);
+ colnum = get_attnum(RelationGetRelid(rel),
+ cdef->colname);
+ if (colnum == InvalidAttrNumber)
+ elog(ERROR, "invalid column name \"%s\"", cdef->colname);
- if (list_length(vars) == 1)
- colname = get_attname(RelationGetRelid(rel),
- ((Var *) linitial(vars))->varattno,
- true);
+ if (cdef->conname)
+ nnname = cdef->conname; /* verify clash? */
else
- colname = NULL;
-
- ccname = ChooseConstraintName(RelationGetRelationName(rel),
- colname,
- "check",
- RelationGetNamespace(rel),
- checknames);
-
- /* save name for future checks */
- checknames = lappend(checknames, ccname);
+ nnname = ChooseConstraintName(RelationGetRelationName(rel),
+ cdef->colname,
+ "not_null",
+ RelationGetNamespace(rel),
+ nnnames);
+ nnnames = lappend(nnnames, nnname);
+
+ constrOid =
+ StoreRelNotNull(rel, nnname, colnum,
+ cdef->initially_valid,
+ is_local,
+ is_local ? 0 : 1,
+ cdef->is_no_inherit);
+
+ nncooked = (CookedConstraint *) palloc(sizeof(CookedConstraint));
+ nncooked->contype = CONSTR_NOTNULL;
+ nncooked->conoid = constrOid;
+ nncooked->name = nnname;
+ nncooked->attnum = colnum;
+ nncooked->expr = NULL;
+ nncooked->skip_validation = cdef->skip_validation;
+ nncooked->is_local = is_local;
+ nncooked->inhcount = is_local ? 0 : 1;
+ nncooked->is_no_inherit = cdef->is_no_inherit;
+
+ cookedConstraints = lappend(cookedConstraints, nncooked);
}
-
- /*
- * OK, store it.
- */
- constrOid =
- StoreRelCheck(rel, ccname, expr, cdef->initially_valid, is_local,
- is_local ? 0 : 1, cdef->is_no_inherit, is_internal);
-
- numchecks++;
-
- cooked = (CookedConstraint *) palloc(sizeof(CookedConstraint));
- cooked->contype = CONSTR_CHECK;
- cooked->conoid = constrOid;
- cooked->name = ccname;
- cooked->attnum = 0;
- cooked->expr = expr;
- cooked->skip_validation = cdef->skip_validation;
- cooked->is_local = is_local;
- cooked->inhcount = is_local ? 0 : 1;
- cooked->is_no_inherit = cdef->is_no_inherit;
- cookedConstraints = lappend(cookedConstraints, cooked);
}
/*
return found;
}
+/* list_sort comparator to sort CookedConstraint by attnum */
+static int
+list_cookedconstr_attnum_cmp(const ListCell *p1, const ListCell *p2)
+{
+ AttrNumber v1 = ((CookedConstraint *) lfirst(p1))->attnum;
+ AttrNumber v2 = ((CookedConstraint *) lfirst(p2))->attnum;
+
+ if (v1 < v2)
+ return -1;
+ if (v1 > v2)
+ return 1;
+ return 0;
+}
+
+/*
+ * Create the NOT NULL constraints for the relation
+ *
+ * These come from two sources: the 'constraints' list (of Constraint) is
+ * specified directly by the user; the 'old_notnulls' list (of
+ * CookedConstraint) comes from inheritance. We create one constraint
+ * for each column, giving priority to user-specified ones, and setting
+ * inhcount according to how many parents cause each column to get a
+ * NOT NULL constraint. If a user-specified name clashes with another
+ * user-specified name, an error is raised.
+ *
+ * Note that inherited constraints have two shapes: those coming from another
+ * NOT NULL constraint in the parent, which have a name already, and those
+ * coming from a PRIMARY KEY in the parent, which don't. Any name specified
+ * in a parent is disregarded in case of a conflict.
+ *
+ * Returns a list of AttrNumber for columns that need to have the attnotnull
+ * flag set.
+ */
+List *
+AddRelationNotNullConstraints(Relation rel, List *constraints,
+ List *old_notnulls)
+{
+ List *nnnames = NIL;
+ List *givennames = NIL;
+ List *nncols = NIL;
+ ListCell *lc;
+
+ /*
+ * First, create all NOT NULLs that are directly specified by the user.
+ * Note that inheritance might have given us another source for each, so
+ * we must scan the old_notnulls list and increment inhcount for each
+ * element with identical attnum. We delete from there any element that
+ * we process.
+ */
+ foreach(lc, constraints)
+ {
+ Constraint *constr = lfirst_node(Constraint, lc);
+ AttrNumber attnum;
+ char *conname;
+ bool is_local = true;
+ int inhcount = 0;
+ ListCell *lc2;
+
+ attnum = get_attnum(RelationGetRelid(rel), constr->colname);
+
+ foreach(lc2, old_notnulls)
+ {
+ CookedConstraint *old = (CookedConstraint *) lfirst(lc2);
+
+ if (old->attnum == attnum)
+ {
+ inhcount++;
+ old_notnulls = foreach_delete_current(old_notnulls, lc2);
+ }
+ }
+
+ /*
+ * Determine a constraint name, which may have been specified by the
+ * user, or raise an error if a conflict exists with another
+ * user-specified name.
+ */
+ if (constr->conname)
+ {
+ foreach(lc2, givennames)
+ {
+ if (strcmp(lfirst(lc2), conname) == 0)
+ ereport(ERROR,
+ errmsg("constraint name \"%s\" is already in use in relation \"%s\"",
+ constr->conname,
+ RelationGetRelationName(rel)));
+ }
+
+ conname = constr->conname;
+ givennames = lappend(givennames, conname);
+ }
+ else
+ conname = ChooseConstraintName(RelationGetRelationName(rel),
+ get_attname(RelationGetRelid(rel),
+ attnum, false),
+ "not_null",
+ RelationGetNamespace(rel),
+ nnnames);
+ nnnames = lappend(nnnames, conname);
+
+ StoreRelNotNull(rel, conname,
+ attnum, true, is_local,
+ inhcount, constr->is_no_inherit);
+
+ nncols = lappend_int(nncols, attnum);
+ }
+
+ /*
+ * If any column remains in the additional_notnulls list, we must create a
+ * NOT NULL constraint marked not-local. Because multiple parents could
+ * specify a NOT NULL for the same column, we must count how many there
+ * are and set inhcount accordingly, deleting elements we've already
+ * processed.
+ *
+ * We don't use foreach() here because we have two nested loops over the
+ * cooked constraint list, with possible element deletions in the inner one.
+ * If we used foreach_delete_current() it could only fix up the state of one
+ * of the loops, so it seems cleaner to use looping over list indexes for
+ * both loops. Note that any deletion will happen beyond where the outer
+ * loop is, so its index never needs adjustment.
+ */
+ list_sort(old_notnulls, list_cookedconstr_attnum_cmp);
+ for (int outerpos = 0; outerpos < list_length(old_notnulls); outerpos++)
+ {
+ CookedConstraint *cooked;
+ char *conname = NULL;
+ int inhcount = 1;
+ ListCell *lc2;
+
+ cooked = (CookedConstraint *) list_nth(old_notnulls, outerpos);
+
+ /* We just preserve the first constraint name we come across, if any */
+ if (conname == NULL && cooked->name)
+ conname = cooked->name;
+
+ for (int restpos = outerpos + 1; restpos < list_length(old_notnulls);)
+ {
+ CookedConstraint *other;
+
+ other = (CookedConstraint *) list_nth(old_notnulls, restpos);
+ if (other->attnum == cooked->attnum)
+ {
+ if (conname == NULL && other->name)
+ conname = other->name;
+
+ inhcount++;
+ old_notnulls = list_delete_nth_cell(old_notnulls, restpos);
+ }
+ else
+ restpos++;
+ }
+
+ /* If we got a name, make sure it isn't one we've already used */
+ if (conname != NULL)
+ {
+ foreach(lc2, nnnames)
+ {
+ if (strcmp(lfirst(lc2), conname) == 0)
+ {
+ conname = NULL;
+ break;
+ }
+ }
+ }
+
+ /* and choose a name, if needed */
+ if (conname == NULL)
+ conname = ChooseConstraintName(RelationGetRelationName(rel),
+ get_attname(RelationGetRelid(rel),
+ cooked->attnum, false),
+ "not_null",
+ RelationGetNamespace(rel),
+ nnnames);
+ nnnames = lappend(nnnames, conname);
+
+ StoreRelNotNull(rel, conname, cooked->attnum, true,
+ false, inhcount,
+ cooked->is_no_inherit);
+
+ nncols = lappend_int(nncols, cooked->attnum);
+ }
+
+ return nncols;
+}
+
/*
* Update the count of constraints in the relation's pg_class tuple.
*
return conname;
}
+/*
+ * Find and return the pg_constraint tuple that implements a validated
+ * NOT NULL constraint for the given column of the given relation.
+ *
+ * XXX This would be easier if we had pg_attribute.notnullconstr with the OID
+ * of the constraint that implements the NOT NULL constraint for that column.
+ * I'm not sure it's worth the catalog bloat and de-normalization, however.
+ */
+HeapTuple
+findNotNullConstraintAttnum(Relation rel, AttrNumber attnum)
+{
+ Relation pg_constraint;
+ HeapTuple conTup,
+ retval = NULL;
+ SysScanDesc scan;
+ ScanKeyData key;
+
+ pg_constraint = table_open(ConstraintRelationId, AccessShareLock);
+ ScanKeyInit(&key,
+ Anum_pg_constraint_conrelid,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(RelationGetRelid(rel)));
+ scan = systable_beginscan(pg_constraint, ConstraintRelidTypidNameIndexId,
+ true, NULL, 1, &key);
+
+ while (HeapTupleIsValid(conTup = systable_getnext(scan)))
+ {
+ Form_pg_constraint con = (Form_pg_constraint) GETSTRUCT(conTup);
+ AttrNumber conkey;
+
+ /*
+ * We're looking for a NOTNULL constraint that's marked validated,
+ * with the column we're looking for as the sole element in conkey.
+ */
+ if (con->contype != CONSTRAINT_NOTNULL)
+ continue;
+ if (!con->convalidated)
+ continue;
+
+ conkey = extractNotNullColumn(conTup);
+ if (conkey != attnum)
+ continue;
+
+ /* Found it */
+ retval = heap_copytuple(conTup);
+ break;
+ }
+
+ systable_endscan(scan);
+ table_close(pg_constraint, AccessShareLock);
+
+ return retval;
+}
+
+/*
+ * Find and return the pg_constraint tuple that implements a validated
+ * NOT NULL constraint for the given column of the given relation.
+ */
+HeapTuple
+findNotNullConstraint(Relation rel, const char *colname)
+{
+ AttrNumber attnum = get_attnum(RelationGetRelid(rel), colname);
+
+ return findNotNullConstraintAttnum(rel, attnum);
+}
+
+/*
+ * Given a pg_constraint tuple for a NOT NULL constraint, return the column
+ * number it is for.
+ */
+AttrNumber
+extractNotNullColumn(HeapTuple constrTup)
+{
+ AttrNumber colnum;
+ Datum adatum;
+ ArrayType *arr;
+
+ /* only tuples for CHECK constraints should be given */
+ Assert(((Form_pg_constraint) GETSTRUCT(constrTup))->contype == CONSTRAINT_NOTNULL);
+
+ adatum = SysCacheGetAttrNotNull(CONSTROID, constrTup,
+ Anum_pg_constraint_conkey);
+ arr = DatumGetArrayTypeP(adatum); /* ensure not toasted */
+ if (ARR_NDIM(arr) != 1 ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != INT2OID ||
+ ARR_DIMS(arr)[0] != 1)
+ elog(ERROR, "conkey is not a 1-D smallint array");
+
+ memcpy(&colnum, ARR_DATA_PTR(arr), sizeof(AttrNumber));
+
+ if ((Pointer) arr != DatumGetPointer(adatum))
+ pfree(arr); /* free de-toasted copy, if any */
+
+ return colnum;
+}
+
/*
* Delete a single constraint record.
*/
typedef struct NewConstraint
{
char *name; /* Constraint name, or NULL if none */
- ConstrType contype; /* CHECK or FOREIGN */
+ ConstrType contype; /* CHECK, FOREIGN */
Oid refrelid; /* PK rel, if FOREIGN */
Oid refindid; /* OID of PK's index, if FOREIGN */
Oid conid; /* OID of pg_constraint entry, if FOREIGN */
static void RangeVarCallbackForTruncate(const RangeVar *relation,
Oid relId, Oid oldRelId, void *arg);
static List *MergeAttributes(List *schema, List *supers, char relpersistence,
- bool is_partition, List **supconstr);
+ bool is_partition, List **supconstr,
+ List **additional_notnulls);
static bool MergeCheckConstraint(List *constraints, char *name, Node *expr);
static void MergeAttributesIntoExisting(Relation child_rel, Relation parent_rel);
static void MergeConstraintsIntoExisting(Relation child_rel, Relation parent_rel);
bool if_not_exists);
static void add_column_datatype_dependency(Oid relid, int32 attnum, Oid typid);
static void add_column_collation_dependency(Oid relid, int32 attnum, Oid collid);
-static void ATPrepDropNotNull(Relation rel, bool recurse, bool recursing);
-static ObjectAddress ATExecDropNotNull(Relation rel, const char *colName, LOCKMODE lockmode);
-static void ATPrepSetNotNull(List **wqueue, Relation rel,
- AlterTableCmd *cmd, bool recurse, bool recursing,
- LOCKMODE lockmode,
- AlterTableUtilityContext *context);
-static ObjectAddress ATExecSetNotNull(AlteredTableInfo *tab, Relation rel,
- const char *colName, LOCKMODE lockmode);
+static ObjectAddress ATExecDropNotNull(Relation rel, const char *colName, bool recurse,
+ LOCKMODE lockmode);
+static void set_attnotnull(List **wqueue, Relation rel,
+ AttrNumber attnum, bool recurse, LOCKMODE lockmode);
+static ObjectAddress ATExecSetNotNull(List **wqueue, Relation rel,
+ char *constrname, char *colName,
+ bool recurse, bool recursing,
+ List **readyRels, LOCKMODE lockmode);
+static void ATExecSetAttNotNull(List **wqueue, Relation rel,
+ const char *colName, LOCKMODE lockmode);
static void ATExecCheckNotNull(AlteredTableInfo *tab, Relation rel,
const char *colName, LOCKMODE lockmode);
static bool NotNullImpliedByRelConstraints(Relation rel, Form_pg_attribute attr);
DropBehavior behavior,
bool recurse, bool recursing,
bool missing_ok, LOCKMODE lockmode);
+static ObjectAddress dropconstraint_internal(Relation rel,
+ HeapTuple constraintTup, DropBehavior behavior,
+ bool recurse, bool recursing,
+ bool missing_ok, List **readyRels,
+ LOCKMODE lockmode);
static void ATPrepAlterColumnType(List **wqueue,
AlteredTableInfo *tab, Relation rel,
bool recurse, bool recursing,
static ObjectAddress ATExecAttachPartition(List **wqueue, Relation rel,
PartitionCmd *cmd,
AlterTableUtilityContext *context);
-static void AttachPartitionEnsureIndexes(Relation rel, Relation attachrel);
+static void AttachPartitionEnsureIndexes(List **wqueue, Relation rel, Relation attachrel);
static void QueuePartitionConstraintValidation(List **wqueue, Relation scanrel,
List *partConstraint,
bool validate_default);
static void validatePartitionedIndex(Relation partedIdx, Relation partedTbl);
static void refuseDupeIndexAttach(Relation parentIdx, Relation partIdx,
Relation partitionTbl);
+static void verifyPartitionIndexNotNull(IndexInfo *iinfo, Relation partIdx);
static List *GetParentedForeignKeyRefs(Relation partition);
static void ATDetachCheckNoForeignKeyRefs(Relation partition);
static char GetAttributeCompression(Oid atttypid, char *compression);
TupleDesc descriptor;
List *inheritOids;
List *old_constraints;
+ List *old_notnulls;
List *rawDefaults;
List *cookedDefaults;
+ List *nncols;
Datum reloptions;
ListCell *listptr;
AttrNumber attnum;
MergeAttributes(stmt->tableElts, inheritOids,
stmt->relation->relpersistence,
stmt->partbound != NULL,
- &old_constraints);
+ &old_constraints, &old_notnulls);
/*
* Create a tuple descriptor from the relation schema. Note that this
- * deals with column names, types, and NOT NULL constraints, but not
- * default values or CHECK constraints; we handle those below.
+ * deals with column names, types, and in-descriptor NOT NULL flags, but
+ * not default values, NOT NULL or CHECK constraints; we handle those
+ * below.
*/
descriptor = BuildDescForRelation(stmt->tableElts);
AddRelationNewConstraints(rel, NIL, stmt->constraints,
true, true, false, queryString);
+ /*
+ * Finally, merge the NOT NULL constraints that are directly declared with
+ * those that come from parent relations (making sure to count inheritance
+ * appropriately for each), create them, and set the attnotnull flag on
+ * columns that don't yet have it.
+ */
+ nncols = AddRelationNotNullConstraints(rel, stmt->nnconstraints,
+ old_notnulls);
+ foreach(listptr, nncols)
+ set_attnotnull(NULL, rel, lfirst_int(listptr), false, NoLock);
+
ObjectAddressSet(address, RelationRelationId, relationId);
/*
* Output arguments:
* 'supconstr' receives a list of constraints belonging to the parents,
* updated as necessary to be valid for the child.
+ * 'nnconstraints' receives a list of CookedConstraints that corresponds to
+ * constraints coming from inheritance parents.
*
* Return value:
* Completed schema list.
*
* Constraints (including NOT NULL constraints) for the child table
* are the union of all relevant constraints, from both the child schema
- * and parent tables.
+ * and parent tables. In addition, in legacy inheritance, each column that
+ * appears in a primary key in any of the parents also gets a NOT NULL
+ * constraint (partitioning doesn't need this, because the PK itself gets
+ * inherited.)
*
* The default value for a child column is defined as:
* (1) If the child schema specifies a default, that value is used.
*/
static List *
MergeAttributes(List *schema, List *supers, char relpersistence,
- bool is_partition, List **supconstr)
+ bool is_partition, List **supconstr, List **supnotnulls)
{
List *inhSchema = NIL;
List *constraints = NIL;
+ List *nnconstraints = NIL;
bool have_bogus_defaults = false;
int child_attno;
static Node bogus_marker = {0}; /* marks conflicting defaults */
AttrMap *newattmap;
List *inherited_defaults;
List *cols_with_defaults;
+ List *nnconstrs;
AttrNumber parent_attno;
ListCell *lc1;
ListCell *lc2;
+ Bitmapset *pkattrs;
+ Bitmapset *nncols = NULL;
+
/* caller already got lock */
relation = table_open(parent, NoLock);
/* We can't process inherited defaults until newattmap is complete. */
inherited_defaults = cols_with_defaults = NIL;
+ /*
+ * All columns that are part of the parent's primary key need to be
+ * NOT NULL; if partition just the attnotnull bit, otherwise a full
+ * constraint (if they don't have one already). Also, we request
+ * attnotnull on columns that have a NOT NULL constraint that's not
+ * marked NO INHERIT.
+ */
+ pkattrs = RelationGetIndexAttrBitmap(relation,
+ INDEX_ATTR_BITMAP_PRIMARY_KEY);
+ nnconstrs = RelationGetNotNullConstraints(relation, true);
+ foreach(lc1, nnconstrs)
+ nncols = bms_add_member(nncols,
+ ((CookedConstraint *) lfirst(lc1))->attnum);
+
for (parent_attno = 1; parent_attno <= tupleDesc->natts;
parent_attno++)
{
}
/*
- * Merge of NOT NULL constraints = OR 'em together
+ * In regular inheritance, columns in the parent's primary key
+ * get an extra CHECK (NOT NULL) constraint. Partitioning
+ * doesn't need this, because the PK itself is going to be
+ * cloned to the partition.
+ */
+ if (!is_partition &&
+ bms_is_member(parent_attno - FirstLowInvalidHeapAttributeNumber,
+ pkattrs))
+ {
+ CookedConstraint *nn;
+
+ nn = palloc(sizeof(CookedConstraint));
+ nn->contype = CONSTR_NOTNULL;
+ nn->conoid = InvalidOid;
+ nn->name = NULL;
+ nn->attnum = exist_attno;
+ nn->expr = NULL;
+ nn->skip_validation = false;
+ nn->is_local = false;
+ nn->inhcount = 1;
+ nn->is_no_inherit = false;
+
+ nnconstraints = lappend(nnconstraints, nn);
+ }
+
+ /*
+ * mark attnotnull if parent has it and it's not NO INHERIT
*/
- def->is_not_null |= attribute->attnotnull;
+ if (bms_is_member(parent_attno, nncols) ||
+ bms_is_member(parent_attno - FirstLowInvalidHeapAttributeNumber,
+ pkattrs))
+ def->is_not_null = true;
/*
* Check for GENERATED conflicts
attribute->atttypmod);
def->inhcount = 1;
def->is_local = false;
- def->is_not_null = attribute->attnotnull;
+ /* mark attnotnull if parent has it and it's not NO INHERIT */
+ if (bms_is_member(parent_attno, nncols) ||
+ bms_is_member(parent_attno - FirstLowInvalidHeapAttributeNumber,
+ pkattrs))
+ def->is_not_null = true;
def->is_from_type = false;
def->storage = attribute->attstorage;
def->raw_default = NULL;
def->compression = NULL;
inhSchema = lappend(inhSchema, def);
newattmap->attnums[parent_attno - 1] = ++child_attno;
+
+ /*
+ * In regular inheritance, columns in the parent's primary key
+ * get an extra NOT NULL constraint. Partitioning doesn't
+ * need this, because the PK itself is going to be cloned to
+ * the partition.
+ */
+ if (!is_partition &&
+ bms_is_member(parent_attno -
+ FirstLowInvalidHeapAttributeNumber,
+ pkattrs))
+ {
+ CookedConstraint *nn;
+
+ nn = palloc(sizeof(CookedConstraint));
+ nn->contype = CONSTR_NOTNULL;
+ nn->conoid = InvalidOid;
+ nn->name = NULL;
+ nn->attnum = newattmap->attnums[parent_attno - 1];
+ nn->expr = NULL;
+ nn->skip_validation = false;
+ nn->is_local = false;
+ nn->inhcount = 1;
+ nn->is_no_inherit = false;
+
+ nnconstraints = lappend(nnconstraints, nn);
+ }
}
/*
}
}
+ /*
+ * Also copy the NOT NULL constraints from this parent. The
+ * attnotnull markings were already installed above.
+ */
+ foreach(lc1, nnconstrs)
+ {
+ CookedConstraint *nn = lfirst(lc1);
+
+ nn->attnum = newattmap->attnums[nn->attnum - 1];
+
+ nnconstraints = lappend(nnconstraints, nn);
+ }
+
free_attrmap(newattmap);
/*
/*
* Now that we have the column definition list for a partition, we can
* check whether the columns referenced in the column constraint specs
- * actually exist. Also, we merge parent's NOT NULL constraints and
- * defaults into each corresponding column definition.
+ * actually exist.
*/
if (is_partition)
{
}
*supconstr = constraints;
+ *supnotnulls = nnconstraints;
+
return schema;
}
return false;
}
+/*
+ * RelationGetNotNullConstraints -- get list of NOT NULL constraints
+ *
+ * Caller can request cooked constraints, or raw.
+ *
+ * This is seldom needed, so we just scan pg_constraint each time.
+ *
+ * XXX This is only used to create derived tables, so NO INHERIT constraints
+ * are always skipped.
+ */
+List *
+RelationGetNotNullConstraints(Relation relation, bool cooked)
+{
+ List *notnulls = NIL;
+ Relation constrRel;
+ HeapTuple htup;
+ SysScanDesc conscan;
+ ScanKeyData skey;
+
+ constrRel = table_open(ConstraintRelationId, AccessShareLock);
+ ScanKeyInit(&skey,
+ Anum_pg_constraint_conrelid,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(RelationGetRelid(relation)));
+ conscan = systable_beginscan(constrRel, ConstraintRelidTypidNameIndexId, true,
+ NULL, 1, &skey);
+
+ while (HeapTupleIsValid(htup = systable_getnext(conscan)))
+ {
+ Form_pg_constraint conForm = (Form_pg_constraint) GETSTRUCT(htup);
+ AttrNumber colnum;
+
+ if (conForm->contype != CONSTRAINT_NOTNULL)
+ continue;
+ if (conForm->connoinherit)
+ continue;
+
+ colnum = extractNotNullColumn(htup);
+
+ if (cooked)
+ {
+ CookedConstraint *cooked;
+
+ cooked = (CookedConstraint *) palloc(sizeof(CookedConstraint));
+
+ cooked->contype = CONSTR_NOTNULL;
+ cooked->name = pstrdup(NameStr(conForm->conname));
+ cooked->attnum = colnum;
+ cooked->expr = NULL;
+ cooked->skip_validation = false;
+ cooked->is_local = true;
+ cooked->inhcount = 0;
+ cooked->is_no_inherit = conForm->connoinherit;
+
+ notnulls = lappend(notnulls, cooked);
+ }
+ else
+ {
+ Constraint *constr;
+
+ constr = makeNode(Constraint);
+ constr->contype = CONSTR_NOTNULL;
+ constr->conname = pstrdup(NameStr(conForm->conname));
+ constr->deferrable = false;
+ constr->initdeferred = false;
+ constr->location = -1;
+ constr->colname = get_attname(RelationGetRelid(relation),
+ colnum, false);
+ constr->skip_validation = false;
+ constr->initially_valid = true;
+ notnulls = lappend(notnulls, constr);
+ }
+ }
+
+ systable_endscan(conscan);
+ table_close(constrRel, AccessShareLock);
+
+ return notnulls;
+}
/*
* StoreCatalogInheritance
constraintOid);
con = (Form_pg_constraint) GETSTRUCT(tuple);
- if (myrelid && con->contype == CONSTRAINT_CHECK && !con->connoinherit)
+ if (myrelid &&
+ (con->contype == CONSTRAINT_CHECK ||
+ con->contype == CONSTRAINT_NOTNULL) &&
+ !con->connoinherit)
{
if (recurse)
{
case AT_AddIndexConstraint:
case AT_ReplicaIdentity:
case AT_SetNotNull:
+ case AT_SetAttNotNull:
case AT_EnableRowSecurity:
case AT_DisableRowSecurity:
case AT_ForceRowSecurity:
break;
case AT_DropNotNull: /* ALTER COLUMN DROP NOT NULL */
ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
- ATPrepDropNotNull(rel, recurse, recursing);
- ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
+ /* Set up recursion for phase 2; no other prep needed */
+ if (recurse)
+ cmd->recurse = true;
pass = AT_PASS_DROP;
break;
case AT_SetNotNull: /* ALTER COLUMN SET NOT NULL */
ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
/* Need command-specific recursion decision */
- ATPrepSetNotNull(wqueue, rel, cmd, recurse, recursing,
- lockmode, context);
+ if (recurse)
+ cmd->recurse = true;
+ pass = AT_PASS_COL_ATTRS;
+ break;
+ case AT_SetAttNotNull: /* set pg_attribute.attnotnull without adding
+ * a constraint */
+ ATSimplePermissions(cmd->subtype, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+ /* Need command-specific recursion decision */
+ ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
pass = AT_PASS_COL_ATTRS;
break;
case AT_CheckNotNull: /* check column is already marked NOT NULL */
address = ATExecDropIdentity(rel, cmd->name, cmd->missing_ok, lockmode);
break;
case AT_DropNotNull: /* ALTER COLUMN DROP NOT NULL */
- address = ATExecDropNotNull(rel, cmd->name, lockmode);
+ address = ATExecDropNotNull(rel, cmd->name, cmd->recurse, lockmode);
break;
case AT_SetNotNull: /* ALTER COLUMN SET NOT NULL */
- address = ATExecSetNotNull(tab, rel, cmd->name, lockmode);
+ address = ATExecSetNotNull(wqueue, rel, NULL, cmd->name,
+ cmd->recurse, false, NULL, lockmode);
+ break;
+ case AT_SetAttNotNull: /* set pg_attribute.attnotnull */
+ ATExecSetAttNotNull(wqueue, rel, cmd->name, lockmode);
break;
case AT_CheckNotNull: /* check column is already marked NOT NULL */
ATExecCheckNotNull(tab, rel, cmd->name, lockmode);
*/
switch (cmd2->subtype)
{
- case AT_SetNotNull:
- /* Need command-specific recursion decision */
- ATPrepSetNotNull(wqueue, rel, cmd2,
- recurse, false,
- lockmode, context);
+ case AT_SetAttNotNull:
+ ATSimpleRecursion(wqueue, rel, cmd2, recurse, lockmode, context);
pass = AT_PASS_COL_ATTRS;
break;
case AT_AddIndex:
RelationGetRelationName(oldrel)),
errtableconstraint(oldrel, con->name)));
break;
+ case CONSTR_NOTNULL:
case CONSTR_FOREIGN:
/* Nothing to do here */
break;
return "ALTER COLUMN ... DROP NOT NULL";
case AT_SetNotNull:
return "ALTER COLUMN ... SET NOT NULL";
+ case AT_SetAttNotNull:
+ return NULL; /* not real grammar */
case AT_DropExpression:
return "ALTER COLUMN ... DROP EXPRESSION";
case AT_CheckNotNull:
*/
static ObjectAddress
ATExecAddColumn(List **wqueue, AlteredTableInfo *tab, Relation rel,
- AlterTableCmd **cmd,
- bool recurse, bool recursing,
+ AlterTableCmd **cmd, bool recurse, bool recursing,
LOCKMODE lockmode, int cur_pass,
AlterTableUtilityContext *context)
{
/*
* ALTER TABLE ALTER COLUMN DROP NOT NULL
- */
-
-static void
-ATPrepDropNotNull(Relation rel, bool recurse, bool recursing)
-{
- /*
- * If the parent is a partitioned table, like check constraints, we do not
- * support removing the NOT NULL while partitions exist.
- */
- if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
- {
- PartitionDesc partdesc = RelationGetPartitionDesc(rel, true);
-
- Assert(partdesc != NULL);
- if (partdesc->nparts > 0 && !recurse && !recursing)
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
- errmsg("cannot remove constraint from only the partitioned table when partitions exist"),
- errhint("Do not specify the ONLY keyword.")));
- }
-}
-
-/*
+ *
* Return the address of the modified column. If the column was already
* nullable, InvalidObjectAddress is returned.
*/
static ObjectAddress
-ATExecDropNotNull(Relation rel, const char *colName, LOCKMODE lockmode)
+ATExecDropNotNull(Relation rel, const char *colName, bool recurse,
+ LOCKMODE lockmode)
{
HeapTuple tuple;
+ HeapTuple conTup;
Form_pg_attribute attTup;
AttrNumber attnum;
Relation attr_rel;
- List *indexoidlist;
- ListCell *indexoidscan;
ObjectAddress address;
/*
colName, RelationGetRelationName(rel))));
attTup = (Form_pg_attribute) GETSTRUCT(tuple);
attnum = attTup->attnum;
+ ObjectAddressSubSet(address, RelationRelationId,
+ RelationGetRelid(rel), attnum);
+
+ /* If the column is already nullable there's nothing to do. */
+ if (!attTup->attnotnull)
+ {
+ table_close(attr_rel, RowExclusiveLock);
+ return InvalidObjectAddress;
+ }
/* Prevent them from altering a system attribute */
if (attnum <= 0)
colName, RelationGetRelationName(rel))));
/*
- * Check that the attribute is not in a primary key or in an index used as
- * a replica identity.
- *
- * Note: we'll throw error even if the pkey index is not valid.
+ * It's not OK to remove a constraint only for the parent and leave it in
+ * the children, so disallow that.
*/
-
- /* Loop over all indexes on the relation */
- indexoidlist = RelationGetIndexList(rel);
-
- foreach(indexoidscan, indexoidlist)
+ if (!recurse)
{
- Oid indexoid = lfirst_oid(indexoidscan);
- HeapTuple indexTuple;
- Form_pg_index indexStruct;
- int i;
+ if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
+ {
+ PartitionDesc partdesc;
- indexTuple = SearchSysCache1(INDEXRELID, ObjectIdGetDatum(indexoid));
- if (!HeapTupleIsValid(indexTuple))
- elog(ERROR, "cache lookup failed for index %u", indexoid);
- indexStruct = (Form_pg_index) GETSTRUCT(indexTuple);
+ partdesc = RelationGetPartitionDesc(rel, true);
- /*
- * If the index is not a primary key or an index used as replica
- * identity, skip the check.
- */
- if (indexStruct->indisprimary || indexStruct->indisreplident)
+ if (partdesc->nparts > 0)
+ ereport(ERROR,
+ errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("cannot remove constraint from only the partitioned table when partitions exist"),
+ errhint("Do not specify the ONLY keyword."));
+ }
+ else if (rel->rd_rel->relhassubclass &&
+ find_inheritance_children(RelationGetRelid(rel), NoLock) != NIL)
{
- /*
- * Loop over each attribute in the primary key or the index used
- * as replica identity and see if it matches the to-be-altered
- * attribute.
- */
- for (i = 0; i < indexStruct->indnkeyatts; i++)
- {
- if (indexStruct->indkey.values[i] == attnum)
- {
- if (indexStruct->indisprimary)
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
- errmsg("column \"%s\" is in a primary key",
- colName)));
- else
- ereport(ERROR,
- (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
- errmsg("column \"%s\" is in index used as replica identity",
- colName)));
- }
- }
+ ereport(ERROR,
+ errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("NOT NULL constraint on column \"%s\" must be removed in child tables too",
+ colName),
+ errhint("Do not specify the ONLY keyword."));
}
-
- ReleaseSysCache(indexTuple);
}
- list_free(indexoidlist);
-
- /* If rel is partition, shouldn't drop NOT NULL if parent has the same */
+ /*
+ * If rel is partition, shouldn't drop NOT NULL if parent has the same.
+ */
if (rel->rd_rel->relispartition)
{
- Oid parentId = get_partition_parent(RelationGetRelid(rel), false);
- Relation parent = table_open(parentId, AccessShareLock);
- TupleDesc tupDesc = RelationGetDescr(parent);
- AttrNumber parent_attnum;
+ Oid parentId = get_partition_parent(RelationGetRelid(rel), false);
+ Relation parent = table_open(parentId, AccessShareLock);
+ TupleDesc tupDesc = RelationGetDescr(parent);
+ AttrNumber parent_attnum;
parent_attnum = get_attnum(parentId, colName);
if (TupleDescAttr(tupDesc, parent_attnum - 1)->attnotnull)
}
/*
- * Okay, actually perform the catalog change ... if needed
+ * Find the constraint that makes this column NOT NULL.
*/
- if (attTup->attnotnull)
+ conTup = findNotNullConstraint(rel, colName);
+ if (conTup == NULL)
{
- attTup->attnotnull = false;
+ Bitmapset *pkcols;
- CatalogTupleUpdate(attr_rel, &tuple->t_self, tuple);
+ /*
+ * There's no NOT NULL constraint, so throw an error. If the column
+ * is in a primary key, we can throw a specific error. Otherwise,
+ * this is unexpected.
+ */
+ pkcols = RelationGetIndexAttrBitmap(rel, INDEX_ATTR_BITMAP_PRIMARY_KEY);
+ if (bms_is_member(attnum - FirstLowInvalidHeapAttributeNumber,
+ pkcols))
+ ereport(ERROR,
+ errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("column \"%s\" is in a primary key", colName));
- ObjectAddressSubSet(address, RelationRelationId,
- RelationGetRelid(rel), attnum);
+ /* this shouldn't happen */
+ elog(ERROR, "no NOT NULL constraint found to drop");
}
- else
- address = InvalidObjectAddress;
- InvokeObjectPostAlterHook(RelationRelationId,
- RelationGetRelid(rel), attnum);
+ dropconstraint_internal(rel, conTup, DROP_RESTRICT, recurse, false,
+ false, NULL, lockmode);
+
+ heap_freetuple(conTup);
table_close(attr_rel, RowExclusiveLock);
}
/*
- * ALTER TABLE ALTER COLUMN SET NOT NULL
+ * Helper to set pg_attribute.attnotnull if it isn't set, and to tell phase 3
+ * to verify it; recurses to apply the same to children.
+ *
+ * When called to alter an existing table, 'wqueue' must be given so that we can
+ * queue a check that existing tuples pass the constraint. When called from
+ * table creation, 'wqueue' should be passed as NULL.
*/
-
static void
-ATPrepSetNotNull(List **wqueue, Relation rel,
- AlterTableCmd *cmd, bool recurse, bool recursing,
- LOCKMODE lockmode, AlterTableUtilityContext *context)
+set_attnotnull(List **wqueue, Relation rel, AttrNumber attnum, bool recurse,
+ LOCKMODE lockmode)
{
- /*
- * If we're already recursing, there's nothing to do; the topmost
- * invocation of ATSimpleRecursion already visited all children.
- */
- if (recursing)
- return;
+ HeapTuple tuple;
+ Form_pg_attribute attForm;
+ List *children;
+ ListCell *lc;
- /*
- * If the target column is already marked NOT NULL, we can skip recursing
- * to children, because their columns should already be marked NOT NULL as
- * well. But there's no point in checking here unless the relation has
- * some children; else we can just wait till execution to check. (If it
- * does have children, however, this can save taking per-child locks
- * unnecessarily. This greatly improves concurrency in some parallel
- * restore scenarios.)
- *
- * Unfortunately, we can only apply this optimization to partitioned
- * tables, because traditional inheritance doesn't enforce that child
- * columns be NOT NULL when their parent is. (That's a bug that should
- * get fixed someday.)
- */
- if (rel->rd_rel->relhassubclass &&
- rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
+ tuple = SearchSysCacheCopyAttNum(RelationGetRelid(rel), attnum);
+ if (!HeapTupleIsValid(tuple))
+ elog(ERROR, "cache lookup failed for attribute %d of relation %u",
+ attnum, RelationGetRelid(rel));
+ attForm = (Form_pg_attribute) GETSTRUCT(tuple);
+ if (!attForm->attnotnull)
{
- HeapTuple tuple;
- bool attnotnull;
+ Relation attr_rel;
- tuple = SearchSysCacheAttName(RelationGetRelid(rel), cmd->name);
+ attr_rel = table_open(AttributeRelationId, RowExclusiveLock);
- /* Might as well throw the error now, if name is bad */
- if (!HeapTupleIsValid(tuple))
- ereport(ERROR,
- (errcode(ERRCODE_UNDEFINED_COLUMN),
- errmsg("column \"%s\" of relation \"%s\" does not exist",
- cmd->name, RelationGetRelationName(rel))));
+ attForm->attnotnull = true;
+ CatalogTupleUpdate(attr_rel, &tuple->t_self, tuple);
- attnotnull = ((Form_pg_attribute) GETSTRUCT(tuple))->attnotnull;
- ReleaseSysCache(tuple);
- if (attnotnull)
- return;
+ table_close(attr_rel, RowExclusiveLock);
+
+ /*
+ * And set up for existing values to be checked, unless another constraint
+ * already proves this.
+ */
+ if (wqueue && !NotNullImpliedByRelConstraints(rel, attForm))
+ {
+ AlteredTableInfo *tab;
+
+ tab = ATGetQueueEntry(wqueue, rel);
+ tab->verify_new_notnull = true;
+ }
}
- /*
- * If we have ALTER TABLE ONLY ... SET NOT NULL on a partitioned table,
- * apply ALTER TABLE ... CHECK NOT NULL to every child. Otherwise, use
- * normal recursion logic.
- */
- if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE &&
- !recurse)
+ /* if no recursion is desired, we're done */
+ if (!recurse)
+ return;
+
+ children = find_inheritance_children(RelationGetRelid(rel), lockmode);
+ foreach(lc, children)
{
- AlterTableCmd *newcmd = makeNode(AlterTableCmd);
+ Oid childrelid = lfirst_oid(lc);
+ Relation childrel;
+ AttrNumber childattno;
+
+ /* find_inheritance_children already got lock */
+ childrel = table_open(childrelid, NoLock);
+ CheckTableNotInUse(childrel, "ALTER TABLE");
- newcmd->subtype = AT_CheckNotNull;
- newcmd->name = pstrdup(cmd->name);
- ATSimpleRecursion(wqueue, rel, newcmd, true, lockmode, context);
+ childattno = get_attnum(RelationGetRelid(childrel),
+ get_attname(RelationGetRelid(rel), attnum,
+ false));
+ set_attnotnull(wqueue, childrel, childattno,
+ recurse, lockmode);
+ table_close(childrel, NoLock);
}
- else
- ATSimpleRecursion(wqueue, rel, cmd, recurse, lockmode, context);
}
/*
- * Return the address of the modified column. If the column was already NOT
- * NULL, InvalidObjectAddress is returned.
+ * ALTER TABLE ALTER COLUMN SET NOT NULL
+ *
+ * Add a NOT NULL constraint to a single table and its children. Returns
+ * the address of the constraint added to the parent relation, if one gets
+ * added, or InvalidObjectAddress otherwise.
+ *
+ * We must recurse to child tables during execution, rather than using
+ * ALTER TABLE's normal prep-time recursion.
*/
static ObjectAddress
-ATExecSetNotNull(AlteredTableInfo *tab, Relation rel,
- const char *colName, LOCKMODE lockmode)
+ATExecSetNotNull(List **wqueue, Relation rel, char *conName, char *colName,
+ bool recurse, bool recursing, List **readyRels,
+ LOCKMODE lockmode)
{
HeapTuple tuple;
+ Relation constr_rel;
+ ScanKeyData skey;
+ SysScanDesc conscan;
AttrNumber attnum;
- Relation attr_rel;
ObjectAddress address;
+ Constraint *constraint;
+ CookedConstraint *ccon;
+ List *cooked;
+ List *ready = NIL;
/*
- * lookup the attribute
+ * In cases of multiple inheritance, we might visit the same child more
+ * than once. In the topmost call, set up a list that we fill with all
+ * visited relations, to skip those.
*/
- attr_rel = table_open(AttributeRelationId, RowExclusiveLock);
+ if (readyRels == NULL)
+ readyRels = &ready;
+ if (list_member_oid(*readyRels, RelationGetRelid(rel)))
+ return InvalidObjectAddress;
+ *readyRels = lappend_oid(*readyRels, RelationGetRelid(rel));
- tuple = SearchSysCacheCopyAttName(RelationGetRelid(rel), colName);
+ /* At top level, permission check was done in ATPrepCmd, else do it */
+ if (recursing)
+ {
+ ATSimplePermissions(AT_AddConstraint, rel, ATT_TABLE | ATT_FOREIGN_TABLE);
+ Assert(conName != NULL);
+ }
- if (!HeapTupleIsValid(tuple))
+ attnum = get_attnum(RelationGetRelid(rel), colName);
+ if (attnum == InvalidAttrNumber)
ereport(ERROR,
(errcode(ERRCODE_UNDEFINED_COLUMN),
errmsg("column \"%s\" of relation \"%s\" does not exist",
colName, RelationGetRelationName(rel))));
- attnum = ((Form_pg_attribute) GETSTRUCT(tuple))->attnum;
-
/* Prevent them from altering a system attribute */
if (attnum <= 0)
ereport(ERROR,
errmsg("cannot alter system column \"%s\"",
colName)));
- /*
- * Okay, actually perform the catalog change ... if needed
- */
- if (!((Form_pg_attribute) GETSTRUCT(tuple))->attnotnull)
+ /* See if there's already a constraint */
+ constr_rel = table_open(ConstraintRelationId, RowExclusiveLock);
+ ScanKeyInit(&skey,
+ Anum_pg_constraint_conrelid,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(RelationGetRelid(rel)));
+ conscan = systable_beginscan(constr_rel, ConstraintRelidTypidNameIndexId, true,
+ NULL, 1, &skey);
+
+ while (HeapTupleIsValid(tuple = systable_getnext(conscan)))
{
- ((Form_pg_attribute) GETSTRUCT(tuple))->attnotnull = true;
+ Form_pg_constraint conForm = (Form_pg_constraint) GETSTRUCT(tuple);
+ bool changed = false;
+ HeapTuple copytup;
- CatalogTupleUpdate(attr_rel, &tuple->t_self, tuple);
+ if (conForm->contype != CONSTRAINT_NOTNULL)
+ continue;
+
+ if (extractNotNullColumn(tuple) != attnum)
+ continue;
+
+ copytup = heap_copytuple(tuple);
+ conForm = (Form_pg_constraint) GETSTRUCT(copytup);
/*
- * Ordinarily phase 3 must ensure that no NULLs exist in columns that
- * are set NOT NULL; however, if we can find a constraint which proves
- * this then we can skip that. We needn't bother looking if we've
- * already found that we must verify some other NOT NULL constraint.
+ * If we find an appropriate constraint, we're almost done, but just
+ * need to change some properties on it: if we're recursing, increment
+ * coninhcount; if not, set conislocal if not already set.
*/
- if (!tab->verify_new_notnull &&
- !NotNullImpliedByRelConstraints(rel, (Form_pg_attribute) GETSTRUCT(tuple)))
+ if (recursing)
{
- /* Tell Phase 3 it needs to test the constraint */
- tab->verify_new_notnull = true;
+ conForm->coninhcount++;
+ changed = true;
+ }
+ else if (!conForm->conislocal)
+ {
+ conForm->conislocal = true;
+ changed = true;
}
- ObjectAddressSubSet(address, RelationRelationId,
- RelationGetRelid(rel), attnum);
+ if (changed)
+ {
+ CatalogTupleUpdate(constr_rel, ©tup->t_self, copytup);
+ ObjectAddressSet(address, ConstraintRelationId, conForm->oid);
+ }
+
+ systable_endscan(conscan);
+ table_close(constr_rel, RowExclusiveLock);
+
+ if (changed)
+ return address;
+ else
+ return InvalidObjectAddress;
}
- else
- address = InvalidObjectAddress;
- InvokeObjectPostAlterHook(RelationRelationId,
- RelationGetRelid(rel), attnum);
+ systable_endscan(conscan);
+ table_close(constr_rel, RowExclusiveLock);
- table_close(attr_rel, RowExclusiveLock);
+ /*
+ * If we're asked not to recurse, and children exist, raise an error.
+ */
+ if (!recurse &&
+ find_inheritance_children(RelationGetRelid(rel),
+ NoLock) != NIL)
+ {
+ if (rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
+ ereport(ERROR,
+ errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("cannot add constraint to only the partitioned table when partitions exist"),
+ errhint("Do not specify the ONLY keyword."));
+ else
+ ereport(ERROR,
+ errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("cannot add constraint only to table with inheritance children"),
+ errhint("Do not specify the ONLY keyword."));
+ }
+
+ /*
+ * No constraint exists; we must add one. First determine a name to use,
+ * if we haven't already.
+ */
+ if (!recursing)
+ {
+ Assert(conName == NULL);
+ conName = ChooseConstraintName(RelationGetRelationName(rel),
+ colName, "not_null",
+ RelationGetNamespace(rel),
+ NIL);
+ }
+ constraint = makeNode(Constraint);
+ constraint->contype = CONSTR_NOTNULL;
+ constraint->conname = conName;
+ constraint->deferrable = false;
+ constraint->initdeferred = false;
+ constraint->location = -1;
+ constraint->colname = colName;
+ constraint->skip_validation = false;
+ constraint->initially_valid = true;
+
+ /* and do it */
+ cooked = AddRelationNewConstraints(rel, NIL, list_make1(constraint),
+ false, !recursing, false, NULL);
+ ccon = linitial(cooked);
+ ObjectAddressSet(address, ConstraintRelationId, ccon->conoid);
+
+ /*
+ * Mark pg_attribute.attnotnull for the column. Tell that function not to
+ * recurse, because we're going to do it here.
+ */
+ set_attnotnull(wqueue, rel, attnum, false, lockmode);
+
+ /*
+ * Recurse to propagate the constraint to children that don't have one.
+ */
+ if (recurse)
+ {
+ List *children;
+ ListCell *lc;
+
+ children = find_inheritance_children(RelationGetRelid(rel),
+ lockmode);
+
+ foreach(lc, children)
+ {
+ Relation childrel;
+
+ childrel = table_open(lfirst_oid(lc), NoLock);
+
+ ATExecSetNotNull(wqueue, childrel,
+ conName, colName, recurse, true,
+ readyRels, lockmode);
+
+ table_close(childrel, NoLock);
+ }
+ }
return address;
}
+/*
+ * ALTER TABLE ALTER COLUMN SET ATTNOTNULL
+ *
+ * This doesn't exist in the grammar; it's used when creating a
+ * primary key and the column is not already marked attnotnull.
+ */
+static void
+ATExecSetAttNotNull(List **wqueue, Relation rel,
+ const char *colName, LOCKMODE lockmode)
+{
+ AttrNumber attnum;
+
+ attnum = get_attnum(RelationGetRelid(rel), colName);
+ if (attnum == InvalidAttrNumber) /* XXX should not happen .. elog? */
+ ereport(ERROR,
+ errcode(ERRCODE_UNDEFINED_COLUMN),
+ errmsg("column \"%s\" of relation \"%s\" does not exist",
+ colName, RelationGetRelationName(rel)));
+
+ set_attnotnull(wqueue, rel, attnum, false, lockmode);
+}
+
/*
* ALTER TABLE ALTER COLUMN CHECK NOT NULL
*
Assert(IsA(newConstraint, Constraint));
/*
- * Currently, we only expect to see CONSTR_CHECK and CONSTR_FOREIGN nodes
- * arriving here (see the preprocessing done in parse_utilcmd.c). Use a
- * switch anyway to make it easier to add more code later.
+ * Currently, we only expect to see CONSTR_CHECK, CONSTR_NOTNULL and
+ * CONSTR_FOREIGN nodes arriving here (see the preprocessing done in
+ * parse_utilcmd.c).
*/
switch (newConstraint->contype)
{
case CONSTR_CHECK:
+ case CONSTR_NOTNULL:
address =
ATAddCheckConstraint(wqueue, tab, rel,
newConstraint, recurse, false, is_readd,
}
/*
- * Add a check constraint to a single table and its children. Returns the
- * address of the constraint added to the parent relation, if one gets added,
- * or InvalidObjectAddress otherwise.
+ * Add a check or NOT NULL constraint to a single table and its children.
+ * Returns the address of the constraint added to the parent relation,
+ * if one gets added, or InvalidObjectAddress otherwise.
*
* Subroutine for ATExecAddConstraint.
*
{
CookedConstraint *ccon = (CookedConstraint *) lfirst(lcon);
- if (!ccon->skip_validation)
+ if (!ccon->skip_validation && ccon->contype != CONSTR_NOTNULL)
{
NewConstraint *newcon;
if (constr->conname == NULL)
constr->conname = ccon->name;
+ /*
+ * If adding a NOT NULL constraint, set the pg_attribute flag and
+ * tell phase 3 to verify existing rows, if needed.
+ */
+ if (constr->contype == CONSTR_NOTNULL)
+ set_attnotnull(wqueue, rel, ccon->attnum,
+ !ccon->is_no_inherit, lockmode);
+
ObjectAddressSet(address, ConstraintRelationId, ccon->conoid);
}
bool recurse, bool recursing,
bool missing_ok, LOCKMODE lockmode)
{
- List *children;
- ListCell *child;
Relation conrel;
- Form_pg_constraint con;
SysScanDesc scan;
ScanKeyData skey[3];
HeapTuple tuple;
bool found = false;
- bool is_no_inherit_constraint = false;
- char contype;
/* At top level, permission check was done in ATPrepCmd, else do it */
if (recursing)
/* There can be at most one matching row */
if (HeapTupleIsValid(tuple = systable_getnext(scan)))
{
- ObjectAddress conobj;
+ dropconstraint_internal(rel, tuple, behavior, recurse, recursing,
+ missing_ok, NULL, lockmode);
+ found = true;
+ }
- con = (Form_pg_constraint) GETSTRUCT(tuple);
+ systable_endscan(scan);
- /* Don't drop inherited constraints */
- if (con->coninhcount > 0 && !recursing)
+ if (!found)
+ {
+ if (!missing_ok)
ereport(ERROR,
- (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
- errmsg("cannot drop inherited constraint \"%s\" of relation \"%s\"",
- constrName, RelationGetRelationName(rel))));
+ errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("constraint \"%s\" of relation \"%s\" does not exist",
+ constrName, RelationGetRelationName(rel)));
+ else
+ ereport(NOTICE,
+ errmsg("constraint \"%s\" of relation \"%s\" does not exist, skipping",
+ constrName, RelationGetRelationName(rel)));
+ }
- is_no_inherit_constraint = con->connoinherit;
- contype = con->contype;
+ table_close(conrel, RowExclusiveLock);
+}
- /*
- * If it's a foreign-key constraint, we'd better lock the referenced
- * table and check that that's not in use, just as we've already done
- * for the constrained table (else we might, eg, be dropping a trigger
- * that has unfired events). But we can/must skip that in the
- * self-referential case.
- */
- if (contype == CONSTRAINT_FOREIGN &&
- con->confrelid != RelationGetRelid(rel))
- {
- Relation frel;
+/*
+ * Remove a constraint, using its pg_constraint tuple
+ *
+ * Implementation for ALTER TABLE DROP CONSTRAINT and ALTER TABLE ALTER COLUMN
+ * DROP NOT NULL.
+ *
+ * Returns the address of the constraint being removed.
+ */
+static ObjectAddress
+dropconstraint_internal(Relation rel, HeapTuple constraintTup, DropBehavior behavior,
+ bool recurse, bool recursing, bool missing_ok, List **readyRels,
+ LOCKMODE lockmode)
+{
+ Relation conrel;
+ Form_pg_constraint con;
+ ObjectAddress conobj;
+ List *children;
+ ListCell *child;
+ bool is_no_inherit_constraint = false;
+ bool dropping_pk = false;
+ char *constrName;
+ List *unconstrained_cols = NIL;
+ char *colname; /* to match NOT NULL constraints when recursing */
+ List *ready = NIL;
+
+ if (readyRels == NULL)
+ readyRels = &ready;
+ if (list_member_oid(*readyRels, RelationGetRelid(rel)))
+ return InvalidObjectAddress;
+ *readyRels = lappend_oid(*readyRels, RelationGetRelid(rel));
- /* Must match lock taken by RemoveTriggerById: */
- frel = table_open(con->confrelid, AccessExclusiveLock);
- CheckTableNotInUse(frel, "ALTER TABLE");
- table_close(frel, NoLock);
- }
+ conrel = table_open(ConstraintRelationId, RowExclusiveLock);
- /*
- * Perform the actual constraint deletion
- */
- conobj.classId = ConstraintRelationId;
- conobj.objectId = con->oid;
- conobj.objectSubId = 0;
+ con = (Form_pg_constraint) GETSTRUCT(constraintTup);
+ constrName = NameStr(con->conname);
- performDeletion(&conobj, behavior, 0);
+ /*
+ * If the constraint is marked conislocal and is also inherited, then we
+ * just set conislocal false and we're done. The constraint doesn't go
+ * away, and we don't modify any children.
+ */
+ if (con->conislocal && con->coninhcount > 0)
+ {
+ HeapTuple copytup;
- found = true;
+ /* make a copy we can scribble on */
+ copytup = heap_copytuple(constraintTup);
+ con = (Form_pg_constraint) GETSTRUCT(copytup);
+ con->conislocal = false;
+ CatalogTupleUpdate(conrel, ©tup->t_self, copytup);
+
+ table_close(conrel, RowExclusiveLock);
+
+ ObjectAddressSet(conobj, ConstraintRelationId, con->oid);
+ return conobj;
}
- systable_endscan(scan);
+ /* Don't drop inherited constraints */
+ if (con->coninhcount > 0 && !recursing)
+ ereport(ERROR,
+ (errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("cannot drop inherited constraint \"%s\" of relation \"%s\"",
+ constrName, RelationGetRelationName(rel))));
- if (!found)
+ /*
+ * See if we have a NOT NULL constraint or a PRIMARY KEY. If so, we have
+ * more checks and actions below, so obtain the list of columns that are
+ * constrained by the constraint being dropped.
+ */
+ if (con->contype == CONSTRAINT_NOTNULL)
{
- if (!missing_ok)
- {
- ereport(ERROR,
- (errcode(ERRCODE_UNDEFINED_OBJECT),
- errmsg("constraint \"%s\" of relation \"%s\" does not exist",
- constrName, RelationGetRelationName(rel))));
- }
- else
+ AttrNumber colnum = extractNotNullColumn(constraintTup);
+
+ if (colnum != InvalidAttrNumber)
+ unconstrained_cols = list_make1_int(colnum);
+ }
+ else if (con->contype == CONSTRAINT_PRIMARY)
+ {
+ Datum adatum;
+ ArrayType *arr;
+ int numkeys;
+ bool isNull;
+ int16 *attnums;
+
+ dropping_pk = true;
+
+ adatum = heap_getattr(constraintTup, Anum_pg_constraint_conkey,
+ RelationGetDescr(conrel), &isNull);
+ if (isNull)
+ elog(ERROR, "null conkey for constraint %u", con->oid);
+ arr = DatumGetArrayTypeP(adatum); /* ensure not toasted */
+ numkeys = ARR_DIMS(arr)[0];
+ if (ARR_NDIM(arr) != 1 ||
+ numkeys < 0 ||
+ ARR_HASNULL(arr) ||
+ ARR_ELEMTYPE(arr) != INT2OID)
+ elog(ERROR, "conkey is not a 1-D smallint array");
+ attnums = (int16 *) ARR_DATA_PTR(arr);
+
+ for (int i = 0; i < numkeys; i++)
+ unconstrained_cols = lappend_int(unconstrained_cols, attnums[i]);
+ }
+
+ is_no_inherit_constraint = con->connoinherit;
+
+ /*
+ * If it's a foreign-key constraint, we'd better lock the referenced table
+ * and check that that's not in use, just as we've already done for the
+ * constrained table (else we might, eg, be dropping a trigger that has
+ * unfired events). But we can/must skip that in the self-referential
+ * case.
+ */
+ if (con->contype == CONSTRAINT_FOREIGN &&
+ con->confrelid != RelationGetRelid(rel))
+ {
+ Relation frel;
+
+ /* Must match lock taken by RemoveTriggerById: */
+ frel = table_open(con->confrelid, AccessExclusiveLock);
+ CheckTableNotInUse(frel, "ALTER TABLE");
+ table_close(frel, NoLock);
+ }
+
+ /*
+ * Perform the actual constraint deletion
+ */
+ ObjectAddressSet(conobj, ConstraintRelationId, con->oid);
+ performDeletion(&conobj, behavior, 0);
+
+ /*
+ * If this was a NOT NULL or the primary key, the constrained columns must
+ * have had pg_attribute.attnotnull set. See if we need to reset it, and
+ * do so.
+ */
+ if (unconstrained_cols)
+ {
+ Relation attrel;
+ Bitmapset *pkcols;
+ Bitmapset *ircols;
+ ListCell *lc;
+
+ /* Make the above deletion visible */
+ CommandCounterIncrement();
+
+ attrel = table_open(AttributeRelationId, RowExclusiveLock);
+
+ /*
+ * We want to test columns for their presence in the primary key, but
+ * only if we're not dropping it.
+ */
+ pkcols = dropping_pk ? NULL :
+ RelationGetIndexAttrBitmap(rel,
+ INDEX_ATTR_BITMAP_PRIMARY_KEY);
+ ircols = RelationGetIndexAttrBitmap(rel, INDEX_ATTR_BITMAP_IDENTITY_KEY);
+
+ foreach(lc, unconstrained_cols)
{
- ereport(NOTICE,
- (errmsg("constraint \"%s\" of relation \"%s\" does not exist, skipping",
- constrName, RelationGetRelationName(rel))));
- table_close(conrel, RowExclusiveLock);
- return;
+ AttrNumber attnum = lfirst_int(lc);
+ HeapTuple atttup;
+ HeapTuple contup;
+ Form_pg_attribute attForm;
+
+ /*
+ * Obtain pg_attribute tuple and verify conditions on it. We use
+ * a copy we can scribble on.
+ */
+ atttup = SearchSysCacheCopyAttNum(RelationGetRelid(rel), attnum);
+ if (!HeapTupleIsValid(atttup))
+ elog(ERROR, "cache lookup failed for column %d", attnum);
+ attForm = (Form_pg_attribute) GETSTRUCT(atttup);
+
+ /*
+ * Since the above deletion has been made visible, we can now
+ * search for any remaining constraints on this column (or these
+ * columns, in the case we're dropping a multicol primary key.)
+ * Then, verify whether any further NOT NULL or primary key
+ * exists, and reset attnotnull if none.
+ *
+ * However, if this is a generated identity column, abort the
+ * whole thing with a specific error message, because the
+ * constraint is required in that case.
+ */
+ contup = findNotNullConstraintAttnum(rel, attnum);
+ if (contup ||
+ bms_is_member(attnum - FirstLowInvalidHeapAttributeNumber,
+ pkcols))
+ continue;
+
+ /*
+ * It's not valid to drop the last NOT NULL constraint for a
+ * GENERATED AS IDENTITY column.
+ */
+ if (attForm->attidentity)
+ ereport(ERROR,
+ errcode(ERRCODE_OBJECT_NOT_IN_PREREQUISITE_STATE),
+ errmsg("column \"%s\" of relation \"%s\" is an identity column",
+ get_attname(RelationGetRelid(rel), attnum,
+ false),
+ RelationGetRelationName(rel)));
+
+ /*
+ * It's not valid to drop the last NOT NULL constraint for the
+ * replica identity either. XXX make exception for FULL?
+ */
+ if (bms_is_member(lfirst_int(lc) - FirstLowInvalidHeapAttributeNumber, ircols))
+ ereport(ERROR,
+ errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("column \"%s\" is in index used as replica identity",
+ get_attname(RelationGetRelid(rel), lfirst_int(lc), false)));
+
+ /* Reset attnotnull */
+ if (attForm->attnotnull)
+ {
+ attForm->attnotnull = false;
+ CatalogTupleUpdate(attrel, &atttup->t_self, atttup);
+ }
}
+ table_close(attrel, RowExclusiveLock);
}
/*
* For partitioned tables, non-CHECK inherited constraints are dropped via
* the dependency mechanism, so we're done here.
*/
- if (contype != CONSTRAINT_CHECK &&
+ if (con->contype != CONSTRAINT_CHECK &&
rel->rd_rel->relkind == RELKIND_PARTITIONED_TABLE)
{
table_close(conrel, RowExclusiveLock);
- return;
+ return conobj;
}
/*
errmsg("cannot remove constraint from only the partitioned table when partitions exist"),
errhint("Do not specify the ONLY keyword.")));
+ /* For NOT NULL constraints we recurse by column name */
+ if (con->contype == CONSTRAINT_NOTNULL)
+ colname = NameStr(TupleDescAttr(RelationGetDescr(rel),
+ linitial_int(unconstrained_cols) - 1)->attname);
+ else
+ colname = NULL; /* keep compiler quiet */
+
foreach(child, children)
{
Oid childrelid = lfirst_oid(child);
Relation childrel;
+ HeapTuple tuple;
+ Form_pg_constraint childcon;
HeapTuple copy_tuple;
+ SysScanDesc scan;
+ ScanKeyData skey[3];
+
+ if (list_member_oid(*readyRels, childrelid))
+ continue; /* child already processed */
/* find_inheritance_children already got lock */
childrel = table_open(childrelid, NoLock);
CheckTableNotInUse(childrel, "ALTER TABLE");
- ScanKeyInit(&skey[0],
- Anum_pg_constraint_conrelid,
- BTEqualStrategyNumber, F_OIDEQ,
- ObjectIdGetDatum(childrelid));
- ScanKeyInit(&skey[1],
- Anum_pg_constraint_contypid,
- BTEqualStrategyNumber, F_OIDEQ,
- ObjectIdGetDatum(InvalidOid));
- ScanKeyInit(&skey[2],
- Anum_pg_constraint_conname,
- BTEqualStrategyNumber, F_NAMEEQ,
- CStringGetDatum(constrName));
- scan = systable_beginscan(conrel, ConstraintRelidTypidNameIndexId,
- true, NULL, 3, skey);
-
- /* There can be at most one matching row */
- if (!HeapTupleIsValid(tuple = systable_getnext(scan)))
- ereport(ERROR,
- (errcode(ERRCODE_UNDEFINED_OBJECT),
- errmsg("constraint \"%s\" of relation \"%s\" does not exist",
- constrName,
- RelationGetRelationName(childrel))));
+ /*
+ * We search for NOT NULL constraint by column number, and other
+ * constraints by name.
+ */
+ if (con->contype == CONSTRAINT_NOTNULL)
+ {
+ bool found = false;
+ AttrNumber child_colnum;
+ HeapTuple child_tup;
+
+ child_colnum = get_attnum(RelationGetRelid(childrel), colname);
+ ScanKeyInit(&skey[0],
+ Anum_pg_constraint_conrelid,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(childrelid));
+ scan = systable_beginscan(conrel, ConstraintRelidTypidNameIndexId,
+ true, NULL, 1, skey);
+ while (HeapTupleIsValid(child_tup = systable_getnext(scan)))
+ {
+ Form_pg_constraint constr = (Form_pg_constraint) GETSTRUCT(child_tup);
+ AttrNumber constr_colnum;
- copy_tuple = heap_copytuple(tuple);
+ if (constr->contype != CONSTRAINT_NOTNULL)
+ continue;
+ constr_colnum = extractNotNullColumn(child_tup);
+ if (constr_colnum != child_colnum)
+ continue;
- systable_endscan(scan);
+ found = true;
+ break; /* found it */
+ }
+ if (!found) /* shouldn't happen? */
+ elog(ERROR, "failed to find NOT NULL constraint for column \"%s\" in table \"%s\"",
+ colname, RelationGetRelationName(childrel));
+
+ copy_tuple = heap_copytuple(child_tup);
+ systable_endscan(scan);
+ }
+ else
+ {
+ ScanKeyInit(&skey[0],
+ Anum_pg_constraint_conrelid,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(childrelid));
+ ScanKeyInit(&skey[1],
+ Anum_pg_constraint_contypid,
+ BTEqualStrategyNumber, F_OIDEQ,
+ ObjectIdGetDatum(InvalidOid));
+ ScanKeyInit(&skey[2],
+ Anum_pg_constraint_conname,
+ BTEqualStrategyNumber, F_NAMEEQ,
+ CStringGetDatum(constrName));
+ scan = systable_beginscan(conrel, ConstraintRelidTypidNameIndexId,
+ true, NULL, 3, skey);
+ /* There can only be one, so no need to loop */
+ tuple = systable_getnext(scan);
+ if (!HeapTupleIsValid(tuple))
+ ereport(ERROR,
+ (errcode(ERRCODE_UNDEFINED_OBJECT),
+ errmsg("constraint \"%s\" of relation \"%s\" does not exist",
+ constrName,
+ RelationGetRelationName(childrel))));
+ copy_tuple = heap_copytuple(tuple);
+ systable_endscan(scan);
+ }
- con = (Form_pg_constraint) GETSTRUCT(copy_tuple);
+ childcon = (Form_pg_constraint) GETSTRUCT(copy_tuple);
- /* Right now only CHECK constraints can be inherited */
- if (con->contype != CONSTRAINT_CHECK)
- elog(ERROR, "inherited constraint is not a CHECK constraint");
+ /* Right now only CHECK and NOT NULL constraints can be inherited */
+ if (childcon->contype != CONSTRAINT_CHECK &&
+ childcon->contype != CONSTRAINT_NOTNULL)
+ elog(ERROR, "inherited constraint is not a CHECK or NOT NULL constraint");
- if (con->coninhcount <= 0) /* shouldn't happen */
+ if (childcon->coninhcount <= 0) /* shouldn't happen */
elog(ERROR, "relation %u has non-inherited constraint \"%s\"",
childrelid, constrName);
* If the child constraint has other definition sources, just
* decrement its inheritance count; if not, recurse to delete it.
*/
- if (con->coninhcount == 1 && !con->conislocal)
+ if (childcon->coninhcount == 1 && !childcon->conislocal)
{
/* Time to delete this child constraint, too */
- ATExecDropConstraint(childrel, constrName, behavior,
- true, true,
- false, lockmode);
+ dropconstraint_internal(childrel, copy_tuple, behavior,
+ recurse, true, missing_ok, readyRels,
+ lockmode);
}
else
{
/* Child constraint must survive my deletion */
- con->coninhcount--;
+ childcon->coninhcount--;
CatalogTupleUpdate(conrel, ©_tuple->t_self, copy_tuple);
/* Make update visible */
* need to mark the inheritors' constraints as locally defined
* rather than inherited.
*/
- con->coninhcount--;
- con->conislocal = true;
+ childcon->coninhcount--;
+ childcon->conislocal = true;
CatalogTupleUpdate(conrel, ©_tuple->t_self, copy_tuple);
}
table_close(conrel, RowExclusiveLock);
+
+ return conobj;
}
/*
NIL,
con->conname);
}
- else if (cmd->subtype == AT_SetNotNull)
+ else if (cmd->subtype == AT_SetAttNotNull)
{
/*
- * The parser will create AT_SetNotNull subcommands for
+ * The parser will create AT_AttSetNotNull subcommands for
* columns of PRIMARY KEY indexes/constraints, but we need
* not do anything with them here, because the columns'
* NOT NULL marks will already have been propagated into
SysScanDesc parent_scan;
ScanKeyData parent_key;
HeapTuple parent_tuple;
+ Oid parent_relid = RelationGetRelid(parent_rel);
bool child_is_partition = false;
catalog_relation = table_open(ConstraintRelationId, RowExclusiveLock);
ScanKeyInit(&parent_key,
Anum_pg_constraint_conrelid,
BTEqualStrategyNumber, F_OIDEQ,
- ObjectIdGetDatum(RelationGetRelid(parent_rel)));
+ ObjectIdGetDatum(parent_relid));
parent_scan = systable_beginscan(catalog_relation, ConstraintRelidTypidNameIndexId,
true, NULL, 1, &parent_key);
HeapTuple child_tuple;
bool found = false;
- if (parent_con->contype != CONSTRAINT_CHECK)
+ if (parent_con->contype != CONSTRAINT_CHECK &&
+ parent_con->contype != CONSTRAINT_NOTNULL)
continue;
/* if the parent's constraint is marked NO INHERIT, it's not inherited */
Form_pg_constraint child_con = (Form_pg_constraint) GETSTRUCT(child_tuple);
HeapTuple child_copy;
- if (child_con->contype != CONSTRAINT_CHECK)
+ if (child_con->contype != parent_con->contype)
continue;
- if (strcmp(NameStr(parent_con->conname),
+ /*
+ * CHECK constraint are matched by name, NOT NULL ones by
+ * attribute number
+ */
+ if (child_con->contype == CONSTRAINT_CHECK &&
+ strcmp(NameStr(parent_con->conname),
NameStr(child_con->conname)) != 0)
continue;
+ else if (child_con->contype == CONSTRAINT_NOTNULL)
+ {
+ AttrNumber parent_attno = extractNotNullColumn(parent_tuple);
+ AttrNumber child_attno = extractNotNullColumn(child_tuple);
+
+ if (strcmp(get_attname(parent_relid, parent_attno, false),
+ get_attname(RelationGetRelid(child_rel), child_attno,
+ false)) != 0)
+ continue;
+ }
- if (!constraints_equivalent(parent_tuple, child_tuple, tuple_desc))
+ if (child_con->contype == CONSTRAINT_CHECK &&
+ !constraints_equivalent(parent_tuple, child_tuple, tuple_desc))
ereport(ERROR,
(errcode(ERRCODE_DATATYPE_MISMATCH),
errmsg("child table \"%s\" has different definition for check constraint \"%s\"",
HeapTuple attributeTuple,
constraintTuple;
List *connames;
+ List *nncolumns;
bool found;
bool child_is_partition = false;
* this, we first need a list of the names of the parent's check
* constraints. (We cheat a bit by only checking for name matches,
* assuming that the expressions will match.)
+ *
+ * For NOT NULL columns, we store column numbers to match.
*/
catalogRelation = table_open(ConstraintRelationId, RowExclusiveLock);
ScanKeyInit(&key[0],
true, NULL, 1, key);
connames = NIL;
+ nncolumns = NIL;
while (HeapTupleIsValid(constraintTuple = systable_getnext(scan)))
{
if (con->contype == CONSTRAINT_CHECK)
connames = lappend(connames, pstrdup(NameStr(con->conname)));
+ if (con->contype == CONSTRAINT_NOTNULL)
+ nncolumns = lappend_int(nncolumns, extractNotNullColumn(constraintTuple));
}
systable_endscan(scan);
while (HeapTupleIsValid(constraintTuple = systable_getnext(scan)))
{
Form_pg_constraint con = (Form_pg_constraint) GETSTRUCT(constraintTuple);
- bool match;
+ bool match = false;
ListCell *lc;
- if (con->contype != CONSTRAINT_CHECK)
- continue;
-
- match = false;
- foreach(lc, connames)
+ /*
+ * Match CHECK constraints by name, NOT NULL constraints by column
+ * number, and ignore all others.
+ */
+ if (con->contype == CONSTRAINT_CHECK)
{
- if (strcmp(NameStr(con->conname), (char *) lfirst(lc)) == 0)
+ foreach(lc, connames)
{
- match = true;
- break;
+ if (con->contype == CONSTRAINT_CHECK &&
+ strcmp(NameStr(con->conname), (char *) lfirst(lc)) == 0)
+ {
+ match = true;
+ break;
+ }
}
}
+ else if (con->contype == CONSTRAINT_NOTNULL)
+ {
+ AttrNumber child_attno = extractNotNullColumn(constraintTuple);
+
+ foreach(lc, nncolumns)
+ {
+ if (lfirst_int(lc) == child_attno)
+ {
+ match = true;
+ break;
+ }
+ }
+ }
+ else
+ continue;
if (match)
{
StorePartitionBound(attachrel, rel, cmd->bound);
/* Ensure there exists a correct set of indexes in the partition. */
- AttachPartitionEnsureIndexes(rel, attachrel);
+ AttachPartitionEnsureIndexes(wqueue, rel, attachrel);
/* and triggers */
CloneRowTriggersToPartition(rel, attachrel);
* partitioned table.
*/
static void
-AttachPartitionEnsureIndexes(Relation rel, Relation attachrel)
+AttachPartitionEnsureIndexes(List **wqueue, Relation rel, Relation attachrel)
{
List *idxes;
List *attachRelIdxs;
Relation *attachrelIdxRels;
IndexInfo **attachInfos;
- int i;
ListCell *cell;
MemoryContext cxt;
MemoryContext oldcxt;
attachInfos = palloc(sizeof(IndexInfo *) * list_length(attachRelIdxs));
/* Build arrays of all existing indexes and their IndexInfos */
- i = 0;
foreach(cell, attachRelIdxs)
{
Oid cldIdxId = lfirst_oid(cell);
+ int i = foreach_current_index(cell);
attachrelIdxRels[i] = index_open(cldIdxId, AccessShareLock);
attachInfos[i] = BuildIndexInfo(attachrelIdxRels[i]);
- i++;
}
/*
* the first matching, unattached one we find, if any, as partition of
* the parent index. If we find one, we're done.
*/
- for (i = 0; i < list_length(attachRelIdxs); i++)
+ for (int i = 0; i < list_length(attachRelIdxs); i++)
{
Oid cldIdxId = RelationGetRelid(attachrelIdxRels[i]);
Oid cldConstrOid = InvalidOid;
stmt = generateClonedIndexStmt(NULL,
idxRel, attmap,
&conOid);
+
+ /*
+ * If the index is a primary key, mark all columns as NOT NULL if
+ * they aren't already.
+ */
+ if (stmt->primary)
+ {
+ MemoryContextSwitchTo(oldcxt);
+ for (int j = 0; j < info->ii_NumIndexKeyAttrs; j++)
+ {
+ AttrNumber childattno;
+
+ childattno = get_attnum(RelationGetRelid(attachrel),
+ get_attname(RelationGetRelid(rel),
+ info->ii_IndexAttrNumbers[j],
+ false));
+ set_attnotnull(wqueue, attachrel, childattno,
+ true, AccessExclusiveLock);
+ }
+ MemoryContextSwitchTo(cxt);
+ }
+
DefineIndex(RelationGetRelid(attachrel), stmt, InvalidOid,
RelationGetRelid(idxRel),
conOid,
out:
/* Clean up. */
- for (i = 0; i < list_length(attachRelIdxs); i++)
+ for (int i = 0; i < list_length(attachRelIdxs); i++)
index_close(attachrelIdxRels[i], AccessShareLock);
MemoryContextSwitchTo(oldcxt);
MemoryContextDelete(cxt);
RelationGetRelationName(partIdx))));
}
+ /*
+ * If it's a primary key, make sure the columns in the partition are
+ * NOT NULL.
+ */
+ if (parentIdx->rd_index->indisprimary)
+ verifyPartitionIndexNotNull(childInfo, partTbl);
+
/* All good -- do it */
IndexSetParentIndex(partIdx, RelationGetRelid(parentIdx));
if (OidIsValid(constraintOid))
}
}
+/*
+ * When attaching an index as a partition of a partitioned index which is a
+ * primary key, verify that all the columns in the partition are marked NOT
+ * NULL.
+ */
+static void
+verifyPartitionIndexNotNull(IndexInfo *iinfo, Relation partition)
+{
+ for (int i = 0; i < iinfo->ii_NumIndexKeyAttrs; i++)
+ {
+ Form_pg_attribute att = TupleDescAttr(RelationGetDescr(partition),
+ iinfo->ii_IndexAttrNumbers[i] - 1);
+
+ if (!att->attnotnull)
+ ereport(ERROR,
+ errcode(ERRCODE_INVALID_TABLE_DEFINITION),
+ errmsg("invalid primary key definition"),
+ errdetail("Column \"%s\" of relation \"%s\" is not marked NOT NULL.",
+ NameStr(att->attname),
+ RelationGetRelationName(partition)));
+ }
+}
+
/*
* Return an OID list of constraints that reference the given relation
* that are marked as having a parent constraints.
case CONSTR_NOTNULL:
appendStringInfoString(str, "NOT_NULL");
+ WRITE_BOOL_FIELD(is_no_inherit);
+ WRITE_STRING_FIELD(colname);
+ WRITE_BOOL_FIELD(skip_validation);
+ WRITE_BOOL_FIELD(initially_valid);
break;
case CONSTR_DEFAULT:
switch (local_node->contype)
{
case CONSTR_NULL:
- case CONSTR_NOTNULL:
/* no extra fields */
break;
+ case CONSTR_NOTNULL:
+ READ_BOOL_FIELD(is_no_inherit);
+ READ_STRING_FIELD(colname);
+ READ_BOOL_FIELD(skip_validation);
+ READ_BOOL_FIELD(initially_valid);
+ break;
+
case CONSTR_DEFAULT:
READ_NODE_FIELD(raw_expr);
READ_STRING_FIELD(cooked_expr);
* Currently, attnotnull constraints must be treated as NO INHERIT unless
* this is a partitioned table. In future we might track their
* inheritance status more accurately, allowing this to be refined.
+ *
+ * XXX do we need/want to change this?
*/
include_notnull = (!rte->inh || rte->relkind == RELKIND_PARTITIONED_TABLE);
n->initially_valid = !n->skip_validation;
$$ = (Node *) n;
}
+ | NOT NULL_P ColId ConstraintAttributeSpec
+ {
+ Constraint *n = makeNode(Constraint);
+
+ n->contype = CONSTR_NOTNULL;
+ n->location = @1;
+ n->colname = $3;
+ processCASbits($4, @4, "NOT NULL",
+ NULL, NULL, NULL,
+ &n->is_no_inherit, yyscanner);
+ n->initially_valid = !n->skip_validation;
+ $$ = (Node *) n;
+ }
| UNIQUE opt_unique_null_treatment '(' columnList ')' opt_c_include opt_definition OptConsTableSpace
ConstraintAttributeSpec
{
List *ckconstraints; /* CHECK constraints */
List *fkconstraints; /* FOREIGN KEY constraints */
List *ixconstraints; /* index-creating constraints */
+ List *nnconstraints; /* NOT NULL constraints */
List *likeclauses; /* LIKE clauses that need post-processing */
List *extstats; /* cloned extended statistics */
List *blist; /* "before list" of things to do before
cxt.ckconstraints = NIL;
cxt.fkconstraints = NIL;
cxt.ixconstraints = NIL;
+ cxt.nnconstraints = NIL;
cxt.likeclauses = NIL;
cxt.extstats = NIL;
cxt.blist = NIL;
*/
stmt->tableElts = cxt.columns;
stmt->constraints = cxt.ckconstraints;
+ stmt->nnconstraints = cxt.nnconstraints;
result = lappend(cxt.blist, stmt);
result = list_concat(result, cxt.alist);
bool saw_default;
bool saw_identity;
bool saw_generated;
+ bool need_notnull = false;
ListCell *clist;
cxt->columns = lappend(cxt->columns, column);
constraint->cooked_expr = NULL;
column->constraints = lappend(column->constraints, constraint);
- constraint = makeNode(Constraint);
- constraint->contype = CONSTR_NOTNULL;
- constraint->location = -1;
- column->constraints = lappend(column->constraints, constraint);
+ /* have a NOT NULL constraint added later */
+ need_notnull = true;
}
/* Process column constraints, if any... */
switch (constraint->contype)
{
case CONSTR_NULL:
- if (saw_nullable && column->is_not_null)
+ if ((saw_nullable && column->is_not_null) || need_notnull)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
break;
case CONSTR_NOTNULL:
- if (saw_nullable && !column->is_not_null)
- ereport(ERROR,
- (errcode(ERRCODE_SYNTAX_ERROR),
- errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
- column->colname, cxt->relation->relname),
- parser_errposition(cxt->pstate,
- constraint->location)));
- column->is_not_null = true;
- saw_nullable = true;
+
+ /*
+ * For NOT NULL declarations, we need to mark the column as
+ * not nullable, and set things up to have a CHECK constraint
+ * created. Also, duplicate NOT NULL declarations are not
+ * allowed.
+ */
+ if (saw_nullable)
+ {
+ if (!column->is_not_null)
+ ereport(ERROR,
+ (errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
+ column->colname, cxt->relation->relname),
+ parser_errposition(cxt->pstate,
+ constraint->location)));
+ else
+ ereport(ERROR,
+ errcode(ERRCODE_SYNTAX_ERROR),
+ errmsg("redundant NOT NULL declarations for column \"%s\" of table \"%s\"",
+ column->colname, cxt->relation->relname),
+ parser_errposition(cxt->pstate,
+ constraint->location));
+ }
+
+ /*
+ * If this is the first time we see this column being marked
+ * not null, keep track to later add a NOT NULL constraint.
+ */
+ if (!column->is_not_null)
+ {
+ Constraint *notnull;
+
+ column->is_not_null = true;
+ saw_nullable = true;
+
+ notnull = makeNode(Constraint);
+ notnull->contype = CONSTR_NOTNULL;
+ notnull->conname = constraint->conname;
+ notnull->deferrable = false;
+ notnull->initdeferred = false;
+ notnull->location = -1;
+ notnull->colname = column->colname;
+ notnull->skip_validation = false;
+ notnull->initially_valid = true;
+
+ cxt->nnconstraints = lappend(cxt->nnconstraints, notnull);
+
+ /* Don't need this anymore, if we had it */
+ need_notnull = false;
+ }
+
break;
case CONSTR_DEFAULT:
column->identity = constraint->generated_when;
saw_identity = true;
- /* An identity column is implicitly NOT NULL */
- if (saw_nullable && !column->is_not_null)
+ /*
+ * Identity columns are always NOT NULL, but we may have a
+ * constraint already.
+ */
+ if (!saw_nullable)
+ need_notnull = true;
+ else if (!column->is_not_null)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
errmsg("conflicting NULL/NOT NULL declarations for column \"%s\" of table \"%s\"",
column->colname, cxt->relation->relname),
parser_errposition(cxt->pstate,
constraint->location)));
- column->is_not_null = true;
- saw_nullable = true;
break;
}
case CONSTR_CHECK:
cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
+
+ /*
+ * XXX If the user says CHECK (IS NOT NULL), should we turn
+ * that into a regular NOT NULL constraint?
+ */
break;
case CONSTR_PRIMARY:
constraint->location)));
}
+ /*
+ * If we need a NOT NULL constraint for SERIAL or IDENTITY, and one was
+ * not explicitly specified, add one now.
+ */
+ if (need_notnull && !(saw_nullable && column->is_not_null))
+ {
+ Constraint *notnull;
+
+ column->is_not_null = true;
+
+ notnull = makeNode(Constraint);
+ notnull->contype = CONSTR_NOTNULL;
+ notnull->conname = NULL;
+ notnull->deferrable = false;
+ notnull->initdeferred = false;
+ notnull->location = -1;
+ notnull->colname = column->colname;
+ notnull->skip_validation = false;
+ notnull->initially_valid = true;
+
+ cxt->nnconstraints = lappend(cxt->nnconstraints, notnull);
+ }
+
/*
* If needed, generate ALTER FOREIGN TABLE ALTER COLUMN statement to add
* per-column foreign data wrapper options to this column after creation.
cxt->ckconstraints = lappend(cxt->ckconstraints, constraint);
break;
+ case CONSTR_NOTNULL:
+ cxt->nnconstraints = lappend(cxt->nnconstraints, constraint);
+ break;
+
case CONSTR_FOREIGN:
if (cxt->isforeign)
ereport(ERROR,
break;
case CONSTR_NULL:
- case CONSTR_NOTNULL:
case CONSTR_DEFAULT:
case CONSTR_ATTR_DEFERRABLE:
case CONSTR_ATTR_NOT_DEFERRABLE:
AclResult aclresult;
char *comment;
ParseCallbackState pcbstate;
+ bool process_notnull_constraints;
setup_parser_errposition_callback(&pcbstate, cxt->pstate,
table_like_clause->relation->location);
def->inhcount = 0;
def->is_local = true;
def->is_not_null = attribute->attnotnull;
+ if (attribute->attnotnull)
+ process_notnull_constraints = true;
def->is_from_type = false;
def->storage = 0;
def->raw_default = NULL;
* we don't yet know what column numbers the copied columns will have in
* the finished table. If any of those options are specified, add the
* LIKE clause to cxt->likeclauses so that expandTableLikeClause will be
- * called after we do know that. Also, remember the relation OID so that
+ * called after we do know that; in addition, do that if there are any NOT
+ * NULL constraints, because those must be propagated even if not
+ * explicitly requested.
+ *
+ * In order for this to work, we remember the relation OID so that
* expandTableLikeClause is certain to open the same table.
*/
- if (table_like_clause->options &
+ if ((table_like_clause->options &
(CREATE_TABLE_LIKE_DEFAULTS |
CREATE_TABLE_LIKE_GENERATED |
CREATE_TABLE_LIKE_CONSTRAINTS |
- CREATE_TABLE_LIKE_INDEXES))
+ CREATE_TABLE_LIKE_INDEXES)) ||
+ process_notnull_constraints)
{
table_like_clause->relationOid = RelationGetRelid(relation);
cxt->likeclauses = lappend(cxt->likeclauses, table_like_clause);
TupleConstr *constr;
AttrMap *attmap;
char *comment;
+ ListCell *lc;
/*
* Open the relation referenced by the LIKE clause. We should still have
}
}
+ /*
+ * Copy NOT NULL constraints, too (these do not require any option to have
+ * been given).
+ */
+ foreach(lc, RelationGetNotNullConstraints(relation, false))
+ {
+ AlterTableCmd *atsubcmd;
+
+ atsubcmd = makeNode(AlterTableCmd);
+ atsubcmd->subtype = AT_AddConstraint;
+ atsubcmd->def = (Node *) lfirst_node(Constraint, lc);
+ atsubcmds = lappend(atsubcmds, atsubcmd);
+ }
+
/*
* If we generated any ALTER TABLE actions above, wrap them into a single
* ALTER TABLE command. Stick it at the front of the result, so it runs
ListCell *lc;
/*
- * Run through the constraints that need to generate an index. For PRIMARY
- * KEY, mark each column as NOT NULL and create an index. For UNIQUE or
- * EXCLUDE, create an index as for PRIMARY KEY, but do not insist on NOT
- * NULL.
+ * Run through the constraints that need to generate an index, and do so.
+ *
+ * For PRIMARY KEY, in addition we set each column's attnotnull flag true.
+ * We do not create a separate CHECK (IS NOT NULL) constraint, as that
+ * would be redundant: the PRIMARY KEY constraint itself fulfills that
+ * role. Other constraint types don't need any NOT NULL markings.
*/
foreach(lc, cxt->ixconstraints)
{
}
/*
- * Now append all the IndexStmts to cxt->alist. If we generated an ALTER
- * TABLE SET NOT NULL statement to support a primary key, it's already in
- * cxt->alist.
+ * Now append all the IndexStmts to cxt->alist.
*/
cxt->alist = list_concat(cxt->alist, finalindexlist);
}
/*
* transformIndexConstraint
* Transform one UNIQUE, PRIMARY KEY, or EXCLUDE constraint for
- * transformIndexConstraints.
+ * transformIndexConstraints. An IndexStmt is returned.
*
- * We return an IndexStmt. For a PRIMARY KEY constraint, we additionally
- * produce NOT NULL constraints, either by marking ColumnDefs in cxt->columns
- * as is_not_null or by adding an ALTER TABLE SET NOT NULL command to
- * cxt->alist.
+ * For a PRIMARY KEY constraint, we additionally force the columns to be
+ * marked as NOT NULL, without producing a CHECK (IS NOT NULL) constraint.
*/
static IndexStmt *
transformIndexConstraint(Constraint *constraint, CreateStmtContext *cxt)
{
char *key = strVal(lfirst(lc));
bool found = false;
- bool forced_not_null = false;
ColumnDef *column = NULL;
ListCell *columns;
IndexElem *iparam;
* column is defined in the new table. For PRIMARY KEY, we
* can apply the NOT NULL constraint cheaply here ... unless
* the column is marked is_from_type, in which case marking it
- * here would be ineffective (see MergeAttributes).
+ * here would be ineffective (see MergeAttributes). Note that
+ * this isn't effective in ALTER TABLE either, unless the
+ * column is being added in the same command.
*/
if (constraint->contype == CONSTR_PRIMARY &&
!column->is_from_type)
{
column->is_not_null = true;
- forced_not_null = true;
}
}
else if (SystemAttributeByName(key) != NULL)
if (strcmp(key, inhname) == 0)
{
found = true;
-
- /*
- * It's tempting to set forced_not_null if the
- * parent column is already NOT NULL, but that
- * seems unsafe because the column's NOT NULL
- * marking might disappear between now and
- * execution. Do the runtime check to be safe.
- */
break;
}
}
iparam->nulls_ordering = SORTBY_NULLS_DEFAULT;
index->indexParams = lappend(index->indexParams, iparam);
- /*
- * For a primary-key column, also create an item for ALTER TABLE
- * SET NOT NULL if we couldn't ensure it via is_not_null above.
- */
- if (constraint->contype == CONSTR_PRIMARY && !forced_not_null)
+ if (constraint->contype == CONSTR_PRIMARY)
{
AlterTableCmd *notnullcmd = makeNode(AlterTableCmd);
- notnullcmd->subtype = AT_SetNotNull;
+ notnullcmd->subtype = AT_SetAttNotNull;
notnullcmd->name = pstrdup(key);
notnullcmds = lappend(notnullcmds, notnullcmd);
}
cxt.isalter = true;
cxt.columns = NIL;
cxt.ckconstraints = NIL;
+ cxt.nnconstraints = NIL;
cxt.fkconstraints = NIL;
cxt.ixconstraints = NIL;
cxt.likeclauses = NIL;
/*
* We assume here that cxt.alist contains only IndexStmts and possibly
- * ALTER TABLE SET NOT NULL statements generated from primary key
- * constraints. We absorb the subcommands of the latter directly.
+ * AT_SetAttNotNull statements generated from primary key constraints.
+ * We absorb the subcommands of the latter directly.
*/
if (IsA(istmt, IndexStmt))
{
{
newcmd = makeNode(AlterTableCmd);
newcmd->subtype = AT_AddConstraint;
- newcmd->def = (Node *) lfirst(l);
+ newcmd->def = (Node *) lfirst_node(Constraint, l);
newcmds = lappend(newcmds, newcmd);
}
foreach(l, cxt.fkconstraints)
{
newcmd = makeNode(AlterTableCmd);
newcmd->subtype = AT_AddConstraint;
- newcmd->def = (Node *) lfirst(l);
+ newcmd->def = (Node *) lfirst_node(Constraint, l);
+ newcmds = lappend(newcmds, newcmd);
+ }
+ foreach(l, cxt.nnconstraints)
+ {
+ newcmd = makeNode(AlterTableCmd);
+ newcmd->subtype = AT_AddConstraint;
+ newcmd->def = (Node *) lfirst_node(Constraint, l);
newcmds = lappend(newcmds, newcmd);
}
conForm->connoinherit ? " NO INHERIT" : "");
break;
}
+ case CONSTRAINT_NOTNULL:
+ {
+ AttrNumber attnum;
+
+ attnum = extractNotNullColumn(tup);
+
+ appendStringInfo(&buf, "NOT NULL %s",
+ quote_identifier(get_attname(conForm->conrelid,
+ attnum, false)));
+ if (((Form_pg_constraint) GETSTRUCT(tup))->connoinherit)
+ appendStringInfoString(&buf, " NO INHERIT");
+ break;
+ }
+
case CONSTRAINT_TRIGGER:
/*
static void flagInhTables(Archive *fout, TableInfo *tblinfo, int numTables,
InhInfo *inhinfo, int numInherits);
static void flagInhIndexes(Archive *fout, TableInfo *tblinfo, int numTables);
-static void flagInhAttrs(DumpOptions *dopt, TableInfo *tblinfo, int numTables);
+static void flagInhAttrs(Archive *fout, DumpOptions *dopt, TableInfo *tblinfo,
+ int numTables);
static int strInArray(const char *pattern, char **arr, int arr_size);
static IndxInfo *findIndexByOid(Oid oid);
getTableAttrs(fout, tblinfo, numTables);
pg_log_info("flagging inherited columns in subtables");
- flagInhAttrs(fout->dopt, tblinfo, numTables);
+ flagInhAttrs(fout, fout->dopt, tblinfo, numTables);
pg_log_info("reading partitioning data");
getPartitioningInfo(fout);
* What we need to do here is:
*
* - Detect child columns that inherit NOT NULL bits from their parents, so
- * that we needn't specify that again for the child.
+ * that we needn't specify that again for the child. (Versions >= 16 no
+ * longer need this.)
*
* - Detect child columns that have DEFAULT NULL when their parents had some
* non-null default. In this case, we make up a dummy AttrDefInfo object so
* modifies tblinfo
*/
static void
-flagInhAttrs(DumpOptions *dopt, TableInfo *tblinfo, int numTables)
+flagInhAttrs(Archive *fout, DumpOptions *dopt, TableInfo *tblinfo, int numTables)
{
int i,
j,
}
}
- /* Remember if we found inherited NOT NULL */
- tbinfo->inhNotNull[j] = foundNotNull;
+ /* In versions < 16, remember if we found inherited NOT NULL */
+ if (fout->remoteVersion < 160000)
+ tbinfo->localNotNull[j] = !foundNotNull;
/*
* Manufacture a DEFAULT NULL clause if necessary. This breaks
if (strcmp(te->desc, "CONSTRAINT") == 0 ||
strcmp(te->desc, "CHECK CONSTRAINT") == 0 ||
+ strcmp(te->desc, "NOT NULL CONSTRAINT") == 0 ||
strcmp(te->desc, "FK CONSTRAINT") == 0)
strcpy(buffer, "DROP CONSTRAINT");
else
/* these object types don't have separate owners */
else if (strcmp(type, "CAST") == 0 ||
strcmp(type, "CHECK CONSTRAINT") == 0 ||
+ strcmp(type, "NOT NULL CONSTRAINT") == 0 ||
strcmp(type, "CONSTRAINT") == 0 ||
strcmp(type, "DATABASE PROPERTIES") == 0 ||
strcmp(type, "DEFAULT") == 0 ||
PQExpBuffer q = createPQExpBuffer();
PQExpBuffer tbloids = createPQExpBuffer();
PQExpBuffer checkoids = createPQExpBuffer();
+ PQExpBuffer defaultoids = createPQExpBuffer();
PGresult *res;
int ntups;
int curtblindx;
int i_attalign;
int i_attislocal;
int i_attnotnull;
+ int i_localnotnull;
int i_attoptions;
int i_attcollation;
int i_attcompression;
/*
* We want to perform just one query against pg_attribute, and then just
- * one against pg_attrdef (for DEFAULTs) and one against pg_constraint
- * (for CHECK constraints). However, we mustn't try to select every row
- * of those catalogs and then sort it out on the client side, because some
- * of the server-side functions we need would be unsafe to apply to tables
- * we don't have lock on. Hence, we build an array of the OIDs of tables
- * we care about (and now have lock on!), and use a WHERE clause to
- * constrain which rows are selected.
+ * one against pg_attrdef (for DEFAULTs) and two against pg_constraint
+ * (for CHECK constraints and for NOT NULL constraints). However, we
+ * mustn't try to select every row of those catalogs and then sort it out
+ * on the client side, because some of the server-side functions we need
+ * would be unsafe to apply to tables we don't have lock on. Hence, we
+ * build an array of the OIDs of tables we care about (and now have lock
+ * on!), and use a WHERE clause to constrain which rows are selected.
*/
appendPQExpBufferChar(tbloids, '{');
appendPQExpBufferChar(checkoids, '{');
+ appendPQExpBufferChar(defaultoids, '{');
for (int i = 0; i < numTables; i++)
{
TableInfo *tbinfo = &tblinfo[i];
"a.attstattarget,\n"
"a.attstorage,\n"
"t.typstorage,\n"
- "a.attnotnull,\n"
"a.atthasdef,\n"
"a.attisdropped,\n"
"a.attlen,\n"
"ORDER BY option_name"
"), E',\n ') AS attfdwoptions,\n");
+ /*
+ * Write out NOT NULL. In 16 and up we have to read pg_constraint, and we
+ * only print it for constraints that aren't connoinherit. A NULL result
+ * means there's no contype='n' row for the column, so we mustn't print
+ * anything then either. We also track conislocal so that we can handle
+ * the case of partitioned tables and binary upgrade especially.
+ */
+ if (fout->remoteVersion >= 160000)
+ appendPQExpBufferStr(q,
+ "co.connoinherit IS NOT NULL AS attnotnull,\n"
+ "coalesce(co.conislocal, false) AS local_notnull,\n");
+ else
+ appendPQExpBufferStr(q,
+ "a.attnotnull, false AS local_notnull,\n");
+
if (fout->remoteVersion >= 140000)
appendPQExpBufferStr(q,
"a.attcompression AS attcompression,\n");
"FROM unnest('%s'::pg_catalog.oid[]) AS src(tbloid)\n"
"JOIN pg_catalog.pg_attribute a ON (src.tbloid = a.attrelid) "
"LEFT JOIN pg_catalog.pg_type t "
- "ON (a.atttypid = t.oid)\n"
- "WHERE a.attnum > 0::pg_catalog.int2\n"
- "ORDER BY a.attrelid, a.attnum",
+ "ON (a.atttypid = t.oid)\n",
tbloids->data);
+ /* in 16, need pg_constraint for NOT NULLs */
+ if (fout->remoteVersion >= 160000)
+ appendPQExpBufferStr(q,
+ " LEFT JOIN pg_catalog.pg_constraint co ON "
+ "(a.attrelid = co.conrelid\n"
+ " AND co.contype = 'n' AND "
+ "co.conkey = array[a.attnum])\n");
+ appendPQExpBufferStr(q,
+ "WHERE a.attnum > 0::pg_catalog.int2\n"
+ "ORDER BY a.attrelid, a.attnum");
+
res = ExecuteSqlQuery(fout, q->data, PGRES_TUPLES_OK);
ntups = PQntuples(res);
i_attalign = PQfnumber(res, "attalign");
i_attislocal = PQfnumber(res, "attislocal");
i_attnotnull = PQfnumber(res, "attnotnull");
+ i_localnotnull = PQfnumber(res, "local_notnull");
i_attoptions = PQfnumber(res, "attoptions");
i_attcollation = PQfnumber(res, "attcollation");
i_attcompression = PQfnumber(res, "attcompression");
i_atthasdef = PQfnumber(res, "atthasdef");
/* Within the next loop, we'll accumulate OIDs of tables with defaults */
- resetPQExpBuffer(tbloids);
- appendPQExpBufferChar(tbloids, '{');
+ resetPQExpBuffer(defaultoids);
+ appendPQExpBufferChar(defaultoids, '{');
/*
* Outer loop iterates once per table, not once per row. Incrementing of
tbinfo->attfdwoptions = (char **) pg_malloc(numatts * sizeof(char *));
tbinfo->attmissingval = (char **) pg_malloc(numatts * sizeof(char *));
tbinfo->notnull = (bool *) pg_malloc(numatts * sizeof(bool));
- tbinfo->inhNotNull = (bool *) pg_malloc(numatts * sizeof(bool));
+ tbinfo->localNotNull = (bool *) pg_malloc(numatts * sizeof(bool));
tbinfo->attrdefs = (AttrDefInfo **) pg_malloc(numatts * sizeof(AttrDefInfo *));
hasdefaults = false;
tbinfo->attalign[j] = *(PQgetvalue(res, r, i_attalign));
tbinfo->attislocal[j] = (PQgetvalue(res, r, i_attislocal)[0] == 't');
tbinfo->notnull[j] = (PQgetvalue(res, r, i_attnotnull)[0] == 't');
+ tbinfo->localNotNull[j] = (PQgetvalue(res, r, i_localnotnull)[0] == 't');
tbinfo->attoptions[j] = pg_strdup(PQgetvalue(res, r, i_attoptions));
tbinfo->attcollation[j] = atooid(PQgetvalue(res, r, i_attcollation));
tbinfo->attcompression[j] = *(PQgetvalue(res, r, i_attcompression));
tbinfo->attrdefs[j] = NULL; /* fix below */
if (PQgetvalue(res, r, i_atthasdef)[0] == 't')
hasdefaults = true;
- /* these flags will be set in flagInhAttrs() */
- tbinfo->inhNotNull[j] = false;
}
if (hasdefaults)
{
/* Collect OIDs of interesting tables that have defaults */
- if (tbloids->len > 1) /* do we have more than the '{'? */
- appendPQExpBufferChar(tbloids, ',');
- appendPQExpBuffer(tbloids, "%u", tbinfo->dobj.catId.oid);
+ if (defaultoids->len > 1) /* do we have more than the '{'? */
+ appendPQExpBufferChar(defaultoids, ',');
+ appendPQExpBuffer(defaultoids, "%u", tbinfo->dobj.catId.oid);
}
}
* Now get info about column defaults. This is skipped for a data-only
* dump, as it is only needed for table schemas.
*/
- if (!dopt->dataOnly && tbloids->len > 1)
+ if (!dopt->dataOnly && defaultoids->len > 1)
{
AttrDefInfo *attrdefs;
int numDefaults;
pg_log_info("finding table default expressions");
- appendPQExpBufferChar(tbloids, '}');
+ appendPQExpBufferChar(defaultoids, '}');
printfPQExpBuffer(q, "SELECT a.tableoid, a.oid, adrelid, adnum, "
"pg_catalog.pg_get_expr(adbin, adrelid) AS adsrc\n"
"FROM unnest('%s'::pg_catalog.oid[]) AS src(tbloid)\n"
"JOIN pg_catalog.pg_attrdef a ON (src.tbloid = a.adrelid)\n"
"ORDER BY a.adrelid, a.adnum",
- tbloids->data);
+ defaultoids->data);
res = ExecuteSqlQuery(fout, q->data, PGRES_TUPLES_OK);
PQclear(res);
}
+ /*
+ * Get info about table NOT NULL constraints. This is skipped for a
+ * data-only dump, as it is only needed for table schemas.
+ *
+ * Optimizing for tables that have no NOT NULL constraint seems
+ * pointless, so we don't try.
+ */
+ if (!dopt->dataOnly)
+ {
+ ConstraintInfo *constrs;
+ int numConstrs;
+ int i_tableoid;
+ int i_oid;
+ int i_conrelid;
+ int i_conname;
+ int i_condef;
+ int i_conislocal;
+
+ pg_log_info("finding table not null constraints");
+
+ /*
+ * Only constraints marked connoinherit need to be handled here;
+ * the normal constraints are instead handled by writing NOT NULL
+ * when each column is defined.
+ */
+ resetPQExpBuffer(q);
+ appendPQExpBuffer(q,
+ "SELECT co.tableoid, co.oid, conrelid, conname, "
+ "pg_catalog.pg_get_constraintdef(co.oid) AS condef,\n"
+ " conislocal, coninhcount, connoinherit "
+ "FROM unnest('%s'::pg_catalog.oid[]) AS src(tbloid)\n"
+ "JOIN pg_catalog.pg_constraint co ON (src.tbloid = co.conrelid)\n"
+ "JOIN pg_catalog.pg_class c ON (conrelid = c.oid)\n"
+ "WHERE contype = 'n' AND connoinherit\n"
+ "ORDER BY co.conrelid, co.conname",
+ tbloids->data);
+
+ res = ExecuteSqlQuery(fout, q->data, PGRES_TUPLES_OK);
+
+ numConstrs = PQntuples(res);
+ constrs = (ConstraintInfo *) pg_malloc(numConstrs * sizeof(ConstraintInfo));
+
+ i_tableoid = PQfnumber(res, "tableoid");
+ i_oid = PQfnumber(res, "oid");
+ i_conrelid = PQfnumber(res, "conrelid");
+ i_conname = PQfnumber(res, "conname");
+ i_condef = PQfnumber(res, "condef");
+ i_conislocal = PQfnumber(res, "conislocal");
+
+ /* As above, this loop iterates once per table, not once per row */
+ curtblindx = -1;
+ for (int j = 0; j < numConstrs;)
+ {
+ Oid conrelid = atooid(PQgetvalue(res, j, i_conrelid));
+ TableInfo *tbinfo = NULL;
+ int numcons;
+
+ /* Count rows for this table */
+ for (numcons = 1; numcons < numConstrs - j; numcons++)
+ if (atooid(PQgetvalue(res, j + numcons, i_conrelid)) != conrelid)
+ break;
+
+ /*
+ * Locate the associated TableInfo; we rely on tblinfo[] being in
+ * OID order.
+ */
+ while (++curtblindx < numTables)
+ {
+ tbinfo = &tblinfo[curtblindx];
+ if (tbinfo->dobj.catId.oid == conrelid)
+ break;
+ }
+ if (curtblindx >= numTables)
+ pg_fatal("unrecognized table OID %u", conrelid);
+
+ for (int c = 0; c < numcons; c++, j++)
+ {
+ constrs[j].dobj.objType = DO_CONSTRAINT;
+ constrs[j].dobj.catId.tableoid = atooid(PQgetvalue(res, j, i_tableoid));
+ constrs[j].dobj.catId.oid = atooid(PQgetvalue(res, j, i_oid));
+ AssignDumpId(&constrs[j].dobj);
+ constrs[j].dobj.name = pg_strdup(PQgetvalue(res, j, i_conname));
+ constrs[j].dobj.namespace = tbinfo->dobj.namespace;
+ constrs[j].contable = tbinfo;
+ constrs[j].condomain = NULL;
+ constrs[j].contype = 'n';
+ constrs[j].condef = pg_strdup(PQgetvalue(res, j, i_condef));
+ constrs[j].confrelid = InvalidOid;
+ constrs[j].conindex = 0;
+ constrs[j].condeferrable = false;
+ constrs[j].condeferred = false;
+ constrs[j].conislocal = (PQgetvalue(res, j, i_conislocal)[0] == 't');
+
+ constrs[j].separate = true;
+
+ constrs[j].dobj.dump = tbinfo->dobj.dump;
+ }
+ }
+
+ PQclear(res);
+ }
+
destroyPQExpBuffer(q);
destroyPQExpBuffer(tbloids);
destroyPQExpBuffer(checkoids);
+ destroyPQExpBuffer(defaultoids);
}
/*
!tbinfo->attrdefs[j]->separate);
/*
- * Not Null constraint --- suppress if inherited, except
- * if partition, or in binary-upgrade case where that
- * won't work.
+ * Not Null constraint --- suppress unless it is locally
+ * defined, except if partition, or in binary-upgrade case
+ * where that won't work.
*/
print_notnull = (tbinfo->notnull[j] &&
- (!tbinfo->inhNotNull[j] ||
+ (tbinfo->localNotNull[j] ||
tbinfo->ispartition || dopt->binary_upgrade));
/*
* we have to mark it separately.
*/
if (!shouldPrintColumn(dopt, tbinfo, j) &&
- tbinfo->notnull[j] && !tbinfo->inhNotNull[j])
+ tbinfo->notnull[j] && tbinfo->localNotNull[j] &&
+ tbinfo->ispartition)
appendPQExpBuffer(q,
"ALTER %sTABLE ONLY %s ALTER COLUMN %s SET NOT NULL;\n",
foreign, qualrelname,
.createStmt = q->data,
.dropStmt = delq->data));
}
+ else if (coninfo->contype == 'n')
+ {
+ appendPQExpBuffer(q, "ALTER %sTABLE %s\n", foreign,
+ fmtQualifiedDumpable(tbinfo));
+ appendPQExpBuffer(q, " ADD CONSTRAINT %s %s;\n",
+ fmtId(coninfo->dobj.name),
+ coninfo->condef);
+
+ appendPQExpBuffer(delq, "ALTER %sTABLE %s\n", foreign,
+ fmtQualifiedDumpable(tbinfo));
+ appendPQExpBuffer(delq, "DROP CONSTRAINT %s;\n",
+ fmtId(coninfo->dobj.name));
+
+ tag = psprintf("%s %s", tbinfo->dobj.name, coninfo->dobj.name);
+
+ if (coninfo->dobj.dump & DUMP_COMPONENT_DEFINITION)
+ ArchiveEntry(fout, coninfo->dobj.catId, coninfo->dobj.dumpId,
+ ARCHIVE_OPTS(.tag = tag,
+ .namespace = tbinfo->dobj.namespace->dobj.name,
+ .owner = tbinfo->rolname,
+ .description = "NOT NULL CONSTRAINT",
+ .section = SECTION_POST_DATA,
+ .createStmt = q->data,
+ .dropStmt = delq->data));
+ }
else if (coninfo->contype == 'c' && tbinfo)
{
/* CHECK constraint on a table */
char **attfdwoptions; /* per-attribute fdw options */
char **attmissingval; /* per attribute missing value */
bool *notnull; /* NOT NULL constraints on attributes */
- bool *inhNotNull; /* true if NOT NULL is inherited */
+ bool *localNotNull; /* true if NOT NULL has local definition */
struct _attrDefInfo **attrdefs; /* DEFAULT expressions */
struct _constraintInfo *checkexprs; /* CHECK constraints */
bool needs_override; /* has GENERATED ALWAYS AS IDENTITY */
);',
regexp => qr/^
\QCREATE TABLE dump_test.fk_reference_test_table (\E
- \n\s+\Qcol1 integer NOT NULL\E
+ \n\s+\Qcol1 integer\E
\n\);
/xm,
like =>
);',
regexp => qr/^
\QCREATE TABLE dump_test.test_table_generated (\E\n
- \s+\Qcol1 integer NOT NULL,\E\n
+ \s+\Qcol1 integer,\E\n
\s+\Qcol2 integer GENERATED ALWAYS AS ((col1 * 2)) STORED\E\n
\);
/xms,
) INHERITS (dump_test.test_inheritance_parent);',
regexp => qr/^
\QCREATE TABLE dump_test.test_inheritance_child (\E\n
- \s+\Qcol1 integer,\E\n
+ \s+\Qcol1 integer NOT NULL,\E\n
\s+\QCONSTRAINT test_inheritance_child CHECK ((col2 >= 142857))\E\n
\)\n
\QINHERITS (dump_test.test_inheritance_parent);\E\n
*/
/* yyyymmddN */
-#define CATALOG_VERSION_NO 202304071
+#define CATALOG_VERSION_NO 202304072
#endif
typedef struct CookedConstraint
{
- ConstrType contype; /* CONSTR_DEFAULT or CONSTR_CHECK */
+ ConstrType contype; /* CONSTR_DEFAULT, CONSTR_CHECK, CONSTR_NOTNULL */
Oid conoid; /* constr OID if created, otherwise Invalid */
char *name; /* name, or NULL if none */
- AttrNumber attnum; /* which attr (only for DEFAULT) */
+ AttrNumber attnum; /* which attr (only for NOTNULL, DEFAULT) */
Node *expr; /* transformed default or check expr */
bool skip_validation; /* skip validation? (only for CHECK) */
bool is_local; /* constraint has local (non-inherited) def */
bool is_local,
bool is_internal,
const char *queryString);
+extern List *AddRelationNotNullConstraints(Relation rel,
+ List *constraints,
+ List *additional_notnulls);
extern void RelationClearMissing(Relation rel);
extern void SetAttrMissing(Oid relid, char *attname, char *value);
/* Valid values for contype */
#define CONSTRAINT_CHECK 'c'
#define CONSTRAINT_FOREIGN 'f'
+#define CONSTRAINT_NOTNULL 'n'
#define CONSTRAINT_PRIMARY 'p'
#define CONSTRAINT_UNIQUE 'u'
#define CONSTRAINT_TRIGGER 't'
bool conNoInherit,
bool is_internal);
-extern void RemoveConstraintById(Oid conId);
-extern void RenameConstraintById(Oid conId, const char *newname);
-
extern bool ConstraintNameIsUsed(ConstraintCategory conCat, Oid objId,
const char *conname);
extern bool ConstraintNameExists(const char *conname, Oid namespaceid);
const char *label, Oid namespaceid,
List *others);
+extern HeapTuple findNotNullConstraintAttnum(Relation rel, AttrNumber attnum);
+extern HeapTuple findNotNullConstraint(Relation rel, const char *colname);
+extern AttrNumber extractNotNullColumn(HeapTuple constrTup);
+
+extern void RemoveConstraintById(Oid conId);
+extern void RenameConstraintById(Oid conId, const char *newname);
+
extern void AlterConstraintNamespaces(Oid ownerId, Oid oldNspId,
Oid newNspId, bool isType, ObjectAddresses *objsMoved);
extern void ConstraintSetParentConstraint(Oid childConstrId,
extern ObjectAddress RenameConstraint(RenameStmt *stmt);
+extern List *RelationGetNotNullConstraints(Relation relation, bool cooked);
+
extern ObjectAddress RenameRelation(RenameStmt *stmt);
extern void RenameRelationInternal(Oid myrelid,
AT_CookedColumnDefault, /* add a pre-cooked column default */
AT_DropNotNull, /* alter column drop not null */
AT_SetNotNull, /* alter column set not null */
+ AT_SetAttNotNull, /* set attnotnull w/o a constraint */
AT_DropExpression, /* alter column drop expression */
AT_CheckNotNull, /* check column is already marked not null */
AT_SetStatistics, /* alter column set statistics */
* Create Table Statement
*
* NOTE: in the raw gram.y output, ColumnDef and Constraint nodes are
- * intermixed in tableElts, and constraints is NIL. After parse analysis,
- * tableElts contains just ColumnDefs, and constraints contains just
- * Constraint nodes (in fact, only CONSTR_CHECK nodes, in the present
- * implementation).
+ * intermixed in tableElts, and constraints and notnullcols are NIL. After
+ * parse analysis, tableElts contains just ColumnDefs, notnullcols has been
+ * filled with not-nullable column names from various sources, and constraints
+ * contains just Constraint nodes (in fact, only CONSTR_CHECK nodes, in the
+ * present implementation).
* ----------------------
*/
PartitionSpec *partspec; /* PARTITION BY clause */
TypeName *ofTypename; /* OF typename */
List *constraints; /* constraints (list of Constraint nodes) */
+ List *nnconstraints; /* NOT NULL constraints (ditto) */
List *options; /* options from WITH clause */
OnCommitAction oncommit; /* what do we do at COMMIT? */
char *tablespacename; /* table space to use, or NULL */
char *cooked_expr; /* expr, as nodeToString representation */
char generated_when; /* ALWAYS or BY DEFAULT */
+ /* Fields used for "raw" NOT NULL constraints: */
+ char *colname; /* column it applies to */
+
/* Fields used for unique constraints (UNIQUE and PRIMARY KEY): */
bool nulls_not_distinct; /* null treatment for UNIQUE constraints */
List *keys; /* String nodes naming referenced key
NOTICE: DDL test: type simple, tag CREATE SEQUENCE
NOTICE: DDL test: type alter table, tag ALTER TABLE
NOTICE: subcommand: type ADD COLUMN (and recurse) desc column b of table parent
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint parent_b_not_null on table parent
NOTICE: DDL test: type simple, tag ALTER SEQUENCE
ALTER TABLE parent RENAME COLUMN b TO c;
NOTICE: DDL test: type simple, tag ALTER TABLE
DROP TABLE part2;
ALTER TABLE part ADD PRIMARY KEY (a);
NOTICE: DDL test: type alter table, tag ALTER TABLE
-NOTICE: subcommand: type SET NOT NULL desc column a of table part
-NOTICE: subcommand: type SET NOT NULL desc column a of table part1
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: subcommand: type ADD INDEX desc index part_pkey
ALTER TABLE parent ALTER COLUMN a SET NOT NULL;
NOTICE: DDL test: type alter table, tag ALTER TABLE
-NOTICE: subcommand: type SET NOT NULL desc column a of table parent
-NOTICE: subcommand: type SET NOT NULL desc column a of table child
-NOTICE: subcommand: type SET NOT NULL desc column a of table grandchild
+NOTICE: subcommand: type SET NOT NULL (and recurse) desc constraint parent_a_not_null on table parent
ALTER TABLE parent ALTER COLUMN a DROP NOT NULL;
NOTICE: DDL test: type alter table, tag ALTER TABLE
-NOTICE: subcommand: type DROP NOT NULL desc column a of table parent
-NOTICE: subcommand: type DROP NOT NULL desc column a of table child
-NOTICE: subcommand: type DROP NOT NULL desc column a of table grandchild
+NOTICE: subcommand: type DROP NOT NULL (and recurse) desc column a of table parent
ALTER TABLE parent ALTER COLUMN a SET NOT NULL;
NOTICE: DDL test: type alter table, tag ALTER TABLE
-NOTICE: subcommand: type SET NOT NULL desc column a of table parent
-NOTICE: subcommand: type SET NOT NULL desc column a of table child
-NOTICE: subcommand: type SET NOT NULL desc column a of table grandchild
+NOTICE: subcommand: type SET NOT NULL (and recurse) desc constraint parent_a_not_null on table parent
ALTER TABLE parent ALTER COLUMN a ADD GENERATED ALWAYS AS IDENTITY;
NOTICE: DDL test: type simple, tag CREATE SEQUENCE
NOTICE: DDL test: type simple, tag ALTER SEQUENCE
NOTICE: subcommand: type ALTER COLUMN SET TYPE desc column c of table parent
NOTICE: subcommand: type ALTER COLUMN SET TYPE desc column c of table child
NOTICE: subcommand: type ALTER COLUMN SET TYPE desc column c of table grandchild
+NOTICE: subcommand: type (re) ADD CONSTRAINT desc constraint parent_b_not_null on table parent
NOTICE: subcommand: type (re) ADD STATS desc statistics object parent_stat
ALTER TABLE parent ALTER COLUMN c SET DEFAULT 0;
NOTICE: DDL test: type alter table, tag ALTER TABLE
NOTICE: DDL test: type simple, tag CREATE SEQUENCE
NOTICE: DDL test: type simple, tag CREATE SEQUENCE
NOTICE: DDL test: type simple, tag CREATE TABLE
+NOTICE: DDL test: type alter table, tag ALTER TABLE
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: DDL test: type simple, tag CREATE INDEX
NOTICE: DDL test: type simple, tag CREATE INDEX
NOTICE: DDL test: type simple, tag ALTER SEQUENCE
EXCLUDE USING btree (check_col_2 WITH =)
);
NOTICE: DDL test: type simple, tag CREATE TABLE
+NOTICE: DDL test: type alter table, tag ALTER TABLE
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: DDL test: type simple, tag CREATE INDEX
NOTICE: DDL test: type simple, tag CREATE INDEX
NOTICE: DDL test: type alter table, tag ALTER TABLE
);
NOTICE: DDL test: type simple, tag CREATE TABLE
NOTICE: DDL test: type alter table, tag ALTER TABLE
-NOTICE: subcommand: type SET NOT NULL desc column name of table employees
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: DDL test: type simple, tag CREATE INDEX
-- Inheritance
CREATE TABLE person (
location point
);
NOTICE: DDL test: type simple, tag CREATE TABLE
+NOTICE: DDL test: type alter table, tag ALTER TABLE
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: DDL test: type simple, tag CREATE INDEX
CREATE TABLE emp (
salary int4,
EXCLUDING ALL
);
NOTICE: DDL test: type simple, tag CREATE TABLE
+NOTICE: DDL test: type alter table, tag ALTER TABLE
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint datatype_table_id_big_not_null on table like_datatype_table
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint datatype_table_id_not_null on table like_datatype_table
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint datatype_table_is_small_not_null on table like_datatype_table
CREATE TABLE like_fkey_table (
LIKE fkey_table
INCLUDING DEFAULTS
NOTICE: DDL test: type simple, tag CREATE TABLE
NOTICE: DDL test: type alter table, tag ALTER TABLE
NOTICE: subcommand: type ALTER COLUMN SET DEFAULT (precooked) desc column id of table like_fkey_table
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint fkey_table_big_id_not_null on table like_fkey_table
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint fkey_table_check_col_1_not_null on table like_fkey_table
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint fkey_table_check_col_2_not_null on table like_fkey_table
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint fkey_table_datatype_id_not_null on table like_fkey_table
+NOTICE: subcommand: type ADD CONSTRAINT (and recurse) desc constraint fkey_table_id_not_null on table like_fkey_table
NOTICE: DDL test: type simple, tag CREATE INDEX
NOTICE: DDL test: type simple, tag CREATE INDEX
-- Volatile table types
id INT PRIMARY KEY
);
NOTICE: DDL test: type simple, tag CREATE TABLE
+NOTICE: DDL test: type alter table, tag ALTER TABLE
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: DDL test: type simple, tag CREATE INDEX
CREATE TEMP TABLE temp_table (
id INT PRIMARY KEY
);
NOTICE: DDL test: type simple, tag CREATE TABLE
+NOTICE: DDL test: type alter table, tag ALTER TABLE
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: DDL test: type simple, tag CREATE INDEX
CREATE TEMP TABLE temp_table_commit_delete (
id INT PRIMARY KEY
)
ON COMMIT DELETE ROWS;
NOTICE: DDL test: type simple, tag CREATE TABLE
+NOTICE: DDL test: type alter table, tag ALTER TABLE
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: DDL test: type simple, tag CREATE INDEX
CREATE TEMP TABLE temp_table_commit_drop (
id INT PRIMARY KEY
)
ON COMMIT DROP;
NOTICE: DDL test: type simple, tag CREATE TABLE
+NOTICE: DDL test: type alter table, tag ALTER TABLE
+NOTICE: subcommand: type SET ATTNOTNULL desc <NULL>
NOTICE: DDL test: type simple, tag CREATE INDEX
case AT_SetNotNull:
strtype = "SET NOT NULL";
break;
+ case AT_SetAttNotNull:
+ strtype = "SET ATTNOTNULL";
+ break;
case AT_DropExpression:
strtype = "DROP EXPRESSION";
break;
if (OidIsValid(sub->address.objectId))
{
char *objdesc;
+
objdesc = getObjectDescription((const ObjectAddress *) &sub->address, false);
values[1] = CStringGetTextDatum(objdesc);
}
create table atacc1 (test int not null);
alter table atacc1 add constraint "atacc1_pkey" primary key (test);
alter table atacc1 alter column test drop not null;
-ERROR: column "test" is in a primary key
alter table atacc1 drop constraint "atacc1_pkey";
-alter table atacc1 alter column test drop not null;
+\d atacc1
+ Table "public.atacc1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ test | integer | | |
+
insert into atacc1 values (null);
alter table atacc1 alter test set not null;
ERROR: column "test" of relation "atacc1" contains null values
insert into parent values (NULL);
insert into child (a, b) values (NULL, 'foo');
alter table only parent alter a set not null;
-ERROR: column "a" of relation "parent" contains null values
+ERROR: cannot add constraint only to table with inheritance children
+HINT: Do not specify the ONLY keyword.
alter table child alter a set not null;
ERROR: column "a" of relation "child" contains null values
-delete from parent;
-alter table only parent alter a set not null;
-insert into parent values (NULL);
-ERROR: null value in column "a" of relation "parent" violates not-null constraint
-DETAIL: Failing row contains (null).
-alter table child alter a set not null;
-insert into child (a, b) values (NULL, 'foo');
-ERROR: null value in column "a" of relation "child" violates not-null constraint
-DETAIL: Failing row contains (null, foo).
-delete from child;
-alter table child alter a set not null;
-insert into child (a, b) values (NULL, 'foo');
-ERROR: null value in column "a" of relation "child" violates not-null constraint
-DETAIL: Failing row contains (null, foo).
drop table child;
drop table parent;
-- test setting and removing default values
TABLE "ataddindex" CONSTRAINT "ataddindex_ref_id_fkey" FOREIGN KEY (ref_id) REFERENCES ataddindex(id)
DROP TABLE ataddindex;
+CREATE TABLE atnotnull1 ();
+ALTER TABLE atnotnull1
+ ADD COLUMN a INT,
+ ALTER a SET NOT NULL;
+ALTER TABLE atnotnull1
+ ADD COLUMN b INT,
+ ADD NOT NULL b;
+ALTER TABLE atnotnull1
+ ADD COLUMN c INT,
+ ADD PRIMARY KEY (c);
+SELECT conrelid::regclass, conname, contype, conkey,
+ (SELECT attname FROM pg_attribute WHERE attrelid = conrelid AND attnum = conkey[1]),
+ coninhcount, conislocal
+ FROM pg_constraint WHERE contype IN ('n','p') AND
+ conrelid IN ('atnotnull1'::regclass);
+ conrelid | conname | contype | conkey | attname | coninhcount | conislocal
+------------+-----------------------+---------+--------+---------+-------------+------------
+ atnotnull1 | atnotnull1_a_not_null | n | {1} | a | 0 | t
+ atnotnull1 | atnotnull1_b_not_null | n | {2} | b | 0 | t
+ atnotnull1 | atnotnull1_pkey | p | {3} | c | 0 | t
+(3 rows)
+
-- unsupported constraint types for partitioned tables
CREATE TABLE partitioned (
a int,
-- cannot add/drop NOT NULL or check constraints to *only* the parent, when
-- partitions exist
ALTER TABLE ONLY list_parted2 ALTER b SET NOT NULL;
-ERROR: constraint must be added to child tables too
-DETAIL: Column "b" of relation "part_2" is not already NOT NULL.
+ERROR: cannot add constraint to only the partitioned table when partitions exist
HINT: Do not specify the ONLY keyword.
ALTER TABLE ONLY list_parted2 ADD CONSTRAINT check_b CHECK (b <> 'zz');
ERROR: constraint must be added to child tables too
DETAIL: Key (b)=(1111) is not present in table "clstr_tst_s".
SELECT conname FROM pg_constraint WHERE conrelid = 'clstr_tst'::regclass
ORDER BY 1;
- conname
-----------------
+ conname
+----------------------
+ clstr_tst_a_not_null
clstr_tst_con
clstr_tst_pkey
-(2 rows)
+(3 rows)
SELECT relname, relkind,
EXISTS(SELECT 1 FROM pg_class WHERE oid = c.reltoastrelid) AS hastoast
DETAIL: Failing row contains (null, 3).
DROP TABLE ATACC1 CASCADE;
NOTICE: drop cascades to table atacc2
+-- NOT NULL NO INHERIT
+CREATE TABLE ATACC1 (a int, not null a no inherit);
+CREATE TABLE ATACC2 () INHERITS (ATACC1);
+\d ATACC2
+ Table "public.atacc2"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | |
+Inherits: atacc1
+
+DROP TABLE ATACC1, ATACC2;
+CREATE TABLE ATACC1 (a int);
+ALTER TABLE ATACC1 ADD NOT NULL a NO INHERIT;
+CREATE TABLE ATACC2 () INHERITS (ATACC1);
+\d ATACC2
+ Table "public.atacc2"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | |
+Inherits: atacc1
+
+DROP TABLE ATACC1, ATACC2;
--
-- Check constraints on INSERT INTO
--
ERROR: could not create exclusion constraint "deferred_excl_f1_excl"
DETAIL: Key (f1)=(3) conflicts with key (f1)=(3).
DROP TABLE deferred_excl;
+-- verify constraints created for NOT NULL clauses
+CREATE TABLE notnull_tbl1 (a INTEGER NOT NULL);
+\d notnull_tbl1
+ Table "public.notnull_tbl1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | not null |
+
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+ conname | contype | conkey
+-------------------------+---------+--------
+ notnull_tbl1_a_not_null | n | {1}
+(1 row)
+
+-- DROP NOT NULL gets rid of both the attnotnull flag and the constraint itself
+ALTER TABLE notnull_tbl1 ALTER a DROP NOT NULL;
+\d notnull_tbl1
+ Table "public.notnull_tbl1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | |
+
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+ conname | contype | conkey
+---------+---------+--------
+(0 rows)
+
+-- SET NOT NULL puts both back
+ALTER TABLE notnull_tbl1 ALTER a SET NOT NULL;
+\d notnull_tbl1
+ Table "public.notnull_tbl1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | not null |
+
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+ conname | contype | conkey
+-------------------------+---------+--------
+ notnull_tbl1_a_not_null | n | {1}
+(1 row)
+
+-- Doing it twice doesn't create a redundant constraint
+ALTER TABLE notnull_tbl1 ALTER a SET NOT NULL;
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+ conname | contype | conkey
+-------------------------+---------+--------
+ notnull_tbl1_a_not_null | n | {1}
+(1 row)
+
+-- Using the "table constraint" syntax also works
+ALTER TABLE notnull_tbl1 ALTER a DROP NOT NULL;
+ALTER TABLE notnull_tbl1 ADD CONSTRAINT foobar NOT NULL a;
+\d notnull_tbl1
+ Table "public.notnull_tbl1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | not null |
+
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+ conname | contype | conkey
+---------+---------+--------
+ foobar | n | {1}
+(1 row)
+
+DROP TABLE notnull_tbl1;
+CREATE TABLE notnull_tbl2 (a INTEGER PRIMARY KEY);
+ALTER TABLE notnull_tbl2 ALTER a DROP NOT NULL;
+ERROR: column "a" is in a primary key
+CREATE TABLE notnull_tbl3 (a INTEGER NOT NULL, CHECK (a IS NOT NULL));
+ALTER TABLE notnull_tbl3 ALTER A DROP NOT NULL;
+ALTER TABLE notnull_tbl3 ADD b int, ADD CONSTRAINT pk PRIMARY KEY (a, b);
+\d notnull_tbl3
+ Table "public.notnull_tbl3"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | not null |
+ b | integer | | not null |
+Indexes:
+ "pk" PRIMARY KEY, btree (a, b)
+Check constraints:
+ "notnull_tbl3_a_check" CHECK (a IS NOT NULL)
+
+ALTER TABLE notnull_tbl3 DROP CONSTRAINT pk;
+\d notnull_tbl3
+ Table "public.notnull_tbl3"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | |
+ b | integer | | |
+Check constraints:
+ "notnull_tbl3_a_check" CHECK (a IS NOT NULL)
+
-- Comments
-- Setup a low-level role to enforce non-superuser checks.
CREATE ROLE regress_constraint_comments;
) FOR VALUES IN ('b');
NOTICE: merging constraint "check_a" with inherited definition
-- conislocal should be false for any merged constraints, true otherwise
-SELECT conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass ORDER BY conislocal, coninhcount;
- conislocal | coninhcount
-------------+-------------
- f | 1
- t | 0
-(2 rows)
+SELECT conname, conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass ORDER BY coninhcount DESC, conname;
+ conname | conislocal | coninhcount
+-------------------+------------+-------------
+ check_a | f | 1
+ part_b_b_not_null | t | 1
+ check_b | t | 0
+(3 rows)
-- Once check_b is added to the parent, it should be made non-local for part_b
ALTER TABLE parted ADD CONSTRAINT check_b CHECK (b >= 0);
NOTICE: merging constraint "check_b" with inherited definition
-SELECT conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass;
+SELECT conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass ORDER BY coninhcount DESC, conname;
conislocal | coninhcount
------------+-------------
f | 1
f | 1
-(2 rows)
+ t | 1
+(3 rows)
-- Neither check_a nor check_b are droppable from part_b
ALTER TABLE part_b DROP CONSTRAINT check_a;
-- traditional inheritance where they will be left behind, because they would
-- be local constraints.
ALTER TABLE parted DROP CONSTRAINT check_a, DROP CONSTRAINT check_b;
-SELECT conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass;
- conislocal | coninhcount
-------------+-------------
-(0 rows)
+SELECT conname, conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass ORDER BY coninhcount;
+ conname | conislocal | coninhcount
+-------------------+------------+-------------
+ part_b_b_not_null | t | 1
+(1 row)
-- specify PARTITION BY for a partition
CREATE TABLE fail_part_col_not_found PARTITION OF parted FOR VALUES IN ('c') PARTITION BY RANGE (c);
NOTICE: END: command_tag=CREATE SEQUENCE type=sequence identity=evttrig.one_col_a_seq
NOTICE: END: command_tag=CREATE SEQUENCE type=sequence identity=evttrig.one_col_c_seq
NOTICE: END: command_tag=CREATE TABLE type=table identity=evttrig.one
+NOTICE: END: command_tag=ALTER TABLE type=table identity=evttrig.one
NOTICE: END: command_tag=CREATE INDEX type=index identity=evttrig.one_pkey
NOTICE: END: command_tag=ALTER SEQUENCE type=sequence identity=evttrig.one_col_a_seq
NOTICE: END: command_tag=ALTER SEQUENCE type=sequence identity=evttrig.one_col_c_seq
id int PRIMARY KEY)
PARTITION BY RANGE (id);
NOTICE: END: command_tag=CREATE TABLE type=table identity=evttrig.parted
+NOTICE: END: command_tag=ALTER TABLE type=table identity=evttrig.parted
NOTICE: END: command_tag=CREATE INDEX type=index identity=evttrig.parted_pkey
CREATE TABLE evttrig.part_1_10 PARTITION OF evttrig.parted (id)
FOR VALUES FROM (1) TO (10);
FROM pg_class AS pc JOIN pg_constraint AS pgc ON (conrelid = pc.oid)
WHERE pc.relname = 'fd_pt1'
ORDER BY 1,2;
- relname | conname | contype | conislocal | coninhcount | connoinherit
----------+------------+---------+------------+-------------+--------------
- fd_pt1 | fd_pt1chk1 | c | t | 0 | t
- fd_pt1 | fd_pt1chk2 | c | t | 0 | f
-(2 rows)
+ relname | conname | contype | conislocal | coninhcount | connoinherit
+---------+--------------------+---------+------------+-------------+--------------
+ fd_pt1 | fd_pt1_c1_not_null | n | t | 0 | f
+ fd_pt1 | fd_pt1chk1 | c | t | 0 | t
+ fd_pt1 | fd_pt1chk2 | c | t | 0 | f
+(3 rows)
-- child does not inherit NO INHERIT constraints
\d+ fd_pt1
part33_self_fk | parted_self_fk_id_abc_fkey | f | t | parted_self_fk_id_abc_fkey | t | parted_self_fk
part3_self_fk | parted_self_fk_id_abc_fkey | f | t | parted_self_fk_id_abc_fkey | t | parted_self_fk
parted_self_fk | parted_self_fk_id_abc_fkey | f | t | | | parted_self_fk
+ part1_self_fk | part1_self_fk_id_not_null | n | t | | |
+ part2_self_fk | parted_self_fk_id_not_null | n | t | | |
+ part32_self_fk | part3_self_fk_id_not_null | n | t | | |
+ part33_self_fk | part33_self_fk_id_not_null | n | t | | |
+ part3_self_fk | part3_self_fk_id_not_null | n | t | | |
+ parted_self_fk | parted_self_fk_id_not_null | n | t | | |
part1_self_fk | part1_self_fk_pkey | p | t | parted_self_fk_pkey | t |
part2_self_fk | part2_self_fk_pkey | p | t | parted_self_fk_pkey | t |
part32_self_fk | part32_self_fk_pkey | p | t | part3_self_fk_pkey | t |
part33_self_fk | part33_self_fk_pkey | p | t | part3_self_fk_pkey | t |
part3_self_fk | part3_self_fk_pkey | p | t | parted_self_fk_pkey | t |
parted_self_fk | parted_self_fk_pkey | p | t | | |
-(12 rows)
+(18 rows)
-- detach and re-attach multiple times just to ensure everything is kosher
ALTER TABLE parted_self_fk DETACH PARTITION part2_self_fk;
part33_self_fk | parted_self_fk_id_abc_fkey | f | t | parted_self_fk_id_abc_fkey | t | parted_self_fk
part3_self_fk | parted_self_fk_id_abc_fkey | f | t | parted_self_fk_id_abc_fkey | t | parted_self_fk
parted_self_fk | parted_self_fk_id_abc_fkey | f | t | | | parted_self_fk
+ part1_self_fk | part1_self_fk_id_not_null | n | t | | |
+ part2_self_fk | parted_self_fk_id_not_null | n | t | | |
+ part32_self_fk | part3_self_fk_id_not_null | n | t | | |
+ part33_self_fk | part33_self_fk_id_not_null | n | t | | |
+ part3_self_fk | part3_self_fk_id_not_null | n | t | | |
+ parted_self_fk | parted_self_fk_id_not_null | n | t | | |
part1_self_fk | part1_self_fk_pkey | p | t | parted_self_fk_pkey | t |
part2_self_fk | part2_self_fk_pkey | p | t | parted_self_fk_pkey | t |
part32_self_fk | part32_self_fk_pkey | p | t | part3_self_fk_pkey | t |
part33_self_fk | part33_self_fk_pkey | p | t | part3_self_fk_pkey | t |
part3_self_fk | part3_self_fk_pkey | p | t | parted_self_fk_pkey | t |
parted_self_fk | parted_self_fk_pkey | p | t | | |
-(12 rows)
+(18 rows)
-- Leave this table around, for pg_upgrade/pg_dump tests
-- Test creating a constraint at the parent that already exists in partitions.
alter table idxpart attach partition idxpart3 for values from (20, 20) to (30, 30);
select conname, contype, conrelid::regclass, conindid::regclass, conkey
from pg_constraint where conrelid::regclass::text like 'idxpart%'
- order by conname;
- conname | contype | conrelid | conindid | conkey
-----------------+---------+-----------+----------------+--------
- idxpart1_pkey | p | idxpart1 | idxpart1_pkey | {1,2}
- idxpart21_pkey | p | idxpart21 | idxpart21_pkey | {1,2}
- idxpart22_pkey | p | idxpart22 | idxpart22_pkey | {1,2}
- idxpart2_pkey | p | idxpart2 | idxpart2_pkey | {1,2}
- idxpart3_pkey | p | idxpart3 | idxpart3_pkey | {2,1}
- idxpart_pkey | p | idxpart | idxpart_pkey | {1,2}
-(6 rows)
+ order by conrelid::regclass::text, conname;
+ conname | contype | conrelid | conindid | conkey
+---------------------+---------+-----------+----------------+--------
+ idxpart_pkey | p | idxpart | idxpart_pkey | {1,2}
+ idxpart1_pkey | p | idxpart1 | idxpart1_pkey | {1,2}
+ idxpart2_pkey | p | idxpart2 | idxpart2_pkey | {1,2}
+ idxpart21_pkey | p | idxpart21 | idxpart21_pkey | {1,2}
+ idxpart22_pkey | p | idxpart22 | idxpart22_pkey | {1,2}
+ idxpart3_a_not_null | n | idxpart3 | - | {2}
+ idxpart3_b_not_null | n | idxpart3 | - | {1}
+ idxpart3_pkey | p | idxpart3 | idxpart3_pkey | {2,1}
+(8 rows)
drop table idxpart;
-- Verify that multi-layer partitioning honors the requirement that all
create table idxpart0 (like idxpart);
alter table idxpart0 add unique (a);
alter table idxpart attach partition idxpart0 default;
-alter table only idxpart add primary key (a); -- fail, no NOT NULL constraint
-ERROR: constraint must be added to child tables too
-DETAIL: Column "a" of relation "idxpart0" is not already NOT NULL.
-HINT: Do not specify the ONLY keyword.
+alter table only idxpart add primary key (a); -- works, but idxpart0.a is nullable
+\d idxpart0
+ Table "public.idxpart0"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | |
+Partition of: idxpart DEFAULT
+Indexes:
+ "idxpart0_a_key" UNIQUE CONSTRAINT, btree (a)
+
+alter index idxpart_pkey attach partition idxpart0_a_key; -- fails, lacks NOT NULL
+ERROR: invalid primary key definition
+DETAIL: Column "a" of relation "idxpart0" is not marked NOT NULL.
alter table idxpart0 alter column a set not null;
-alter table only idxpart add primary key (a); -- now it works
+alter index idxpart_pkey attach partition idxpart0_a_key;
alter table idxpart0 alter column a drop not null; -- fail, pkey needs it
ERROR: column "a" is marked NOT NULL in parent table
drop table idxpart;
drop table cnullparent cascade;
NOTICE: drop cascades to table cnullchild
--
+-- Test inheritance of NOT NULL constraints
+--
+create table pp1 (f1 int);
+create table cc1 (f2 text, f3 int) inherits (pp1);
+\d cc1
+ Table "public.cc1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | |
+ f2 | text | | |
+ f3 | integer | | |
+Inherits: pp1
+
+create table cc2(f4 float) inherits(pp1,cc1);
+NOTICE: merging multiple inherited definitions of column "f1"
+\d cc2
+ Table "public.cc2"
+ Column | Type | Collation | Nullable | Default
+--------+------------------+-----------+----------+---------
+ f1 | integer | | |
+ f2 | text | | |
+ f3 | integer | | |
+ f4 | double precision | | |
+Inherits: pp1,
+ cc1
+
+-- named NOT NULL constraint
+alter table cc1 add column a2 int constraint nn not null;
+\d cc1
+ Table "public.cc1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | |
+ f2 | text | | |
+ f3 | integer | | |
+ a2 | integer | | not null |
+Inherits: pp1
+Number of child tables: 1 (Use \d+ to list them.)
+
+\d cc2
+ Table "public.cc2"
+ Column | Type | Collation | Nullable | Default
+--------+------------------+-----------+----------+---------
+ f1 | integer | | |
+ f2 | text | | |
+ f3 | integer | | |
+ f4 | double precision | | |
+ a2 | integer | | not null |
+Inherits: pp1,
+ cc1
+
+alter table pp1 alter column f1 set not null;
+\d pp1
+ Table "public.pp1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | not null |
+Number of child tables: 2 (Use \d+ to list them.)
+
+\d cc1
+ Table "public.cc1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | not null |
+ f2 | text | | |
+ f3 | integer | | |
+ a2 | integer | | not null |
+Inherits: pp1
+Number of child tables: 1 (Use \d+ to list them.)
+
+\d cc2
+ Table "public.cc2"
+ Column | Type | Collation | Nullable | Default
+--------+------------------+-----------+----------+---------
+ f1 | integer | | not null |
+ f2 | text | | |
+ f3 | integer | | |
+ f4 | double precision | | |
+ a2 | integer | | not null |
+Inherits: pp1,
+ cc1
+
+-- have a look at pg_constraint
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('pp1'::regclass, 'cc1'::regclass, 'cc2'::regclass)
+ order by 2, 1;
+ conrelid | conname | contype | conkey | attname | coninhcount | conislocal
+----------+-----------------+---------+--------+---------+-------------+------------
+ cc1 | nn | n | {4} | a2 | 0 | t
+ cc2 | nn | n | {5} | a2 | 1 | f
+ pp1 | pp1_f1_not_null | n | {1} | f1 | 0 | t
+ cc1 | pp1_f1_not_null | n | {1} | f1 | 1 | f
+ cc2 | pp1_f1_not_null | n | {1} | f1 | 1 | f
+(5 rows)
+
+-- remove constraint from cc2: no dice, it's inherited
+alter table cc2 alter column a2 drop not null;
+ERROR: cannot drop inherited constraint "nn" of relation "cc2"
+-- remove constraint cc1, should succeed
+alter table cc1 alter column a2 drop not null;
+-- have a look at pg_constraint
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('pp1'::regclass, 'cc1'::regclass, 'cc2'::regclass)
+ order by 2, 1;
+ conrelid | conname | contype | conkey | attname | coninhcount | conislocal
+----------+-----------------+---------+--------+---------+-------------+------------
+ pp1 | pp1_f1_not_null | n | {1} | f1 | 0 | t
+ cc1 | pp1_f1_not_null | n | {1} | f1 | 1 | f
+ cc2 | pp1_f1_not_null | n | {1} | f1 | 1 | f
+(3 rows)
+
+-- same for cc2
+alter table cc2 alter column f1 drop not null;
+ERROR: cannot drop inherited constraint "pp1_f1_not_null" of relation "cc2"
+-- remove from cc1, should fail again
+alter table cc1 alter column f1 drop not null;
+ERROR: cannot drop inherited constraint "pp1_f1_not_null" of relation "cc1"
+-- remove from pp1, should succeed
+alter table pp1 alter column f1 drop not null;
+-- have a look at pg_constraint
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('pp1'::regclass, 'cc1'::regclass, 'cc2'::regclass)
+ order by 2, 1;
+ conrelid | conname | contype | conkey | attname | coninhcount | conislocal
+----------+---------+---------+--------+---------+-------------+------------
+(0 rows)
+
+drop table pp1 cascade;
+NOTICE: drop cascades to 2 other objects
+DETAIL: drop cascades to table cc1
+drop cascades to table cc2
+\d cc1
+\d cc2
+-- test "dropping" a not null constraint that's also inherited
+create table inh_parent (a int not null);
+create table inh_child (a int not null) inherits (inh_parent);
+NOTICE: merging column "a" with inherited definition
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal, connoinherit
+ from pg_constraint where contype in ('n','p') and
+ conrelid in ('inh_child'::regclass, 'inh_parent'::regclass);
+ conrelid | conname | contype | conkey | attname | coninhcount | conislocal | connoinherit
+------------+-----------------------+---------+--------+---------+-------------+------------+--------------
+ inh_parent | inh_parent_a_not_null | n | {1} | a | 0 | t | f
+ inh_child | inh_child_a_not_null | n | {1} | a | 1 | t | f
+(2 rows)
+
+alter table inh_child alter a drop not null;
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal, connoinherit
+ from pg_constraint where contype in ('n','p') and
+ conrelid in ('inh_child'::regclass, 'inh_parent'::regclass);
+ conrelid | conname | contype | conkey | attname | coninhcount | conislocal | connoinherit
+------------+-----------------------+---------+--------+---------+-------------+------------+--------------
+ inh_parent | inh_parent_a_not_null | n | {1} | a | 0 | t | f
+ inh_child | inh_child_a_not_null | n | {1} | a | 1 | f | f
+(2 rows)
+
+alter table inh_parent alter a drop not null;
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal, connoinherit
+ from pg_constraint where contype in ('n','p') and
+ conrelid in ('inh_child'::regclass, 'inh_parent'::regclass);
+ conrelid | conname | contype | conkey | attname | coninhcount | conislocal | connoinherit
+----------+---------+---------+--------+---------+-------------+------------+--------------
+(0 rows)
+
+drop table inh_parent, inh_child;
+-- NOT NULL NO INHERIT
+create table inh_parent(a int);
+create table inh_child() inherits (inh_parent);
+alter table inh_parent add not null a no inherit;
+create table inh_child2() inherits (inh_parent);
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal, connoinherit
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent'::regclass, 'inh_child'::regclass, 'inh_child2'::regclass)
+ order by 2, 1;
+ conrelid | conname | contype | conkey | attname | coninhcount | conislocal | connoinherit
+------------+-----------------------+---------+--------+---------+-------------+------------+--------------
+ inh_parent | inh_parent_a_not_null | n | {1} | a | 0 | t | t
+(1 row)
+
+\d inh_parent
+ Table "public.inh_parent"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | not null |
+Number of child tables: 2 (Use \d+ to list them.)
+
+\d inh_child
+ Table "public.inh_child"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | |
+Inherits: inh_parent
+
+\d inh_child2
+ Table "public.inh_child2"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ a | integer | | |
+Inherits: inh_parent
+
+drop table inh_parent, inh_child, inh_child2;
+--
+-- test inherit/deinherit
+--
+create table inh_parent(f1 int);
+create table inh_child1(f1 int not null);
+create table inh_child2(f1 int);
+-- inh_child1 should have not null constraint
+alter table inh_child1 inherit inh_parent;
+-- should fail, missing NOT NULL constraint
+alter table inh_child2 inherit inh_child1;
+ERROR: column "f1" in child table must be marked NOT NULL
+alter table inh_child2 alter column f1 set not null;
+alter table inh_child2 inherit inh_child1;
+-- add NOT NULL constraint recursively
+alter table inh_parent alter column f1 set not null;
+\d inh_parent
+ Table "public.inh_parent"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | not null |
+Number of child tables: 1 (Use \d+ to list them.)
+
+\d inh_child1
+ Table "public.inh_child1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | not null |
+Inherits: inh_parent
+Number of child tables: 1 (Use \d+ to list them.)
+
+\d inh_child2
+ Table "public.inh_child2"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | not null |
+Inherits: inh_child1
+
+select conrelid::regclass, conname, contype, coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent'::regclass, 'inh_child1'::regclass, 'inh_child2'::regclass)
+ order by 2, 1;
+ conrelid | conname | contype | coninhcount | conislocal
+------------+------------------------+---------+-------------+------------
+ inh_child1 | inh_child1_f1_not_null | n | 1 | t
+ inh_child2 | inh_child2_f1_not_null | n | 1 | t
+ inh_parent | inh_parent_f1_not_null | n | 0 | t
+(3 rows)
+
+--
+-- test deinherit procedure
+--
+-- deinherit inh_child1
+alter table inh_child1 no inherit inh_parent;
+\d inh_parent
+ Table "public.inh_parent"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | not null |
+
+\d inh_child1
+ Table "public.inh_child1"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | not null |
+Number of child tables: 1 (Use \d+ to list them.)
+
+\d inh_child2
+ Table "public.inh_child2"
+ Column | Type | Collation | Nullable | Default
+--------+---------+-----------+----------+---------
+ f1 | integer | | not null |
+Inherits: inh_child1
+
+select conrelid::regclass, conname, contype, coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent'::regclass, 'inh_child1'::regclass, 'inh_child2'::regclass)
+ order by 2, 1;
+ conrelid | conname | contype | coninhcount | conislocal
+------------+------------------------+---------+-------------+------------
+ inh_child1 | inh_child1_f1_not_null | n | 0 | t
+ inh_child2 | inh_child2_f1_not_null | n | 1 | t
+ inh_parent | inh_parent_f1_not_null | n | 0 | t
+(3 rows)
+
+-- test inhcount of inh_child2, should fail
+alter table inh_child2 alter f1 drop not null;
+-- should succeed
+drop table inh_parent;
+drop table inh_child1 cascade;
+NOTICE: drop cascades to table inh_child2
+--
+-- test multi inheritance tree
+--
+create table inh_parent(f1 int not null);
+create table c1() inherits(inh_parent);
+create table c2() inherits(inh_parent);
+create table d1() inherits(c1, c2);
+NOTICE: merging multiple inherited definitions of column "f1"
+-- show constraint info
+select conrelid::regclass, conname, contype, coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent'::regclass, 'c1'::regclass, 'c2'::regclass, 'd1'::regclass)
+ order by 2, 1;
+ conrelid | conname | contype | coninhcount | conislocal
+------------+------------------------+---------+-------------+------------
+ inh_parent | inh_parent_f1_not_null | n | 0 | t
+ c1 | inh_parent_f1_not_null | n | 1 | f
+ c2 | inh_parent_f1_not_null | n | 1 | f
+ d1 | inh_parent_f1_not_null | n | 2 | f
+(4 rows)
+
+drop table inh_parent cascade;
+NOTICE: drop cascades to 3 other objects
+DETAIL: drop cascades to table c1
+drop cascades to table c2
+drop cascades to table d1
+-- test child table with inherited columns and
+-- with explicitly specified not null constraints
+create table inh_parent_1(f1 int);
+create table inh_parent_2(f2 text);
+create table child(f1 int not null, f2 text not null) inherits(inh_parent_1, inh_parent_2);
+NOTICE: merging column "f1" with inherited definition
+NOTICE: merging column "f2" with inherited definition
+-- show constraint info
+select conrelid::regclass, conname, contype, coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent_1'::regclass, 'inh_parent_2'::regclass, 'child'::regclass)
+ order by 2, 1;
+ conrelid | conname | contype | coninhcount | conislocal
+----------+-------------------+---------+-------------+------------
+ child | child_f1_not_null | n | 0 | t
+ child | child_f2_not_null | n | 0 | t
+(2 rows)
+
+-- also drops child table
+drop table inh_parent_1 cascade;
+NOTICE: drop cascades to table child
+drop table inh_parent_2;
+-- test multi layer inheritance tree
+create table inh_p1(f1 int not null);
+create table inh_p2(f1 int not null);
+create table inh_p3(f2 int);
+create table inh_p4(f1 int not null, f3 text not null);
+create table inh_multiparent() inherits(inh_p1, inh_p2, inh_p3, inh_p4);
+NOTICE: merging multiple inherited definitions of column "f1"
+NOTICE: merging multiple inherited definitions of column "f1"
+-- constraint on f1 should have three parents
+select conrelid::regclass, contype, conname,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid::regclass in ('inh_p1', 'inh_p2', 'inh_p3', 'inh_p4',
+ 'inh_multiparent')
+ order by 1, 2;
+ conrelid | contype | conname | attname | coninhcount | conislocal
+-----------------+---------+--------------------+---------+-------------+------------
+ inh_p1 | n | inh_p1_f1_not_null | f1 | 0 | t
+ inh_p2 | n | inh_p2_f1_not_null | f1 | 0 | t
+ inh_p4 | n | inh_p4_f1_not_null | f1 | 0 | t
+ inh_p4 | n | inh_p4_f3_not_null | f3 | 0 | t
+ inh_multiparent | n | inh_p1_f1_not_null | f1 | 3 | f
+ inh_multiparent | n | inh_p4_f3_not_null | f3 | 1 | f
+(6 rows)
+
+create table inh_multiparent2 (a int not null, f1 int) inherits(inh_p3, inh_multiparent);
+NOTICE: merging multiple inherited definitions of column "f2"
+NOTICE: merging column "f1" with inherited definition
+select conrelid::regclass, contype, conname,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid::regclass in ('inh_p3', 'inh_multiparent', 'inh_multiparent2')
+ order by 1, 2;
+ conrelid | contype | conname | attname | coninhcount | conislocal
+------------------+---------+-----------------------------+---------+-------------+------------
+ inh_multiparent | n | inh_p1_f1_not_null | f1 | 3 | f
+ inh_multiparent | n | inh_p4_f3_not_null | f3 | 1 | f
+ inh_multiparent2 | n | inh_multiparent2_a_not_null | a | 0 | t
+ inh_multiparent2 | n | inh_p1_f1_not_null | f1 | 1 | f
+ inh_multiparent2 | n | inh_p4_f3_not_null | f3 | 1 | f
+(5 rows)
+
+drop table inh_p1, inh_p2, inh_p3, inh_p4 cascade;
+NOTICE: drop cascades to 2 other objects
+DETAIL: drop cascades to table inh_multiparent
+drop cascades to table inh_multiparent2
+--
-- Check use of temporary tables with inheritance trees
--
create table inh_perm_parent (a1 int);
"test_replica_identity4_pkey" PRIMARY KEY, btree (id) REPLICA IDENTITY
Partitions: test_replica_identity4_1 FOR VALUES IN (1)
+-- Dropping the primary key is not allowed if that would leave the replica
+-- identity as nullable
+CREATE TABLE test_replica_identity5 (a int not null, b int, c int,
+ PRIMARY KEY (b, c));
+CREATE UNIQUE INDEX test_replica_identity5_a_b_key ON test_replica_identity5 (a, b);
+ALTER TABLE test_replica_identity5 REPLICA IDENTITY USING INDEX test_replica_identity5_a_b_key;
+ALTER TABLE test_replica_identity5 DROP CONSTRAINT test_replica_identity5_pkey;
+ERROR: column "b" is in index used as replica identity
+ALTER TABLE test_replica_identity5 ALTER b SET NOT NULL;
+ALTER TABLE test_replica_identity5 DROP CONSTRAINT test_replica_identity5_pkey;
+ALTER TABLE test_replica_identity5 ALTER b DROP NOT NULL;
+ERROR: column "b" is in index used as replica identity
DROP TABLE test_replica_identity;
DROP TABLE test_replica_identity2;
DROP TABLE test_replica_identity3;
DROP TABLE test_replica_identity4;
+DROP TABLE test_replica_identity5;
DROP TABLE test_replica_identity_othertable;
# ----------
test: partition_join partition_prune reloptions hash_part indexing partition_aggregate partition_info tuplesort explain compression memoize stats
-# event_trigger cannot run concurrently with any test that runs DDL
+# event_trigger depends on create_am and cannot run concurrently with
+# any test that runs DDL
# oidjoins is read-only, though, and should run late for best coverage
test: event_trigger oidjoins
alter table atacc1 add constraint "atacc1_pkey" primary key (test);
alter table atacc1 alter column test drop not null;
alter table atacc1 drop constraint "atacc1_pkey";
-alter table atacc1 alter column test drop not null;
+\d atacc1
insert into atacc1 values (null);
alter table atacc1 alter test set not null;
delete from atacc1;
insert into child (a, b) values (NULL, 'foo');
alter table only parent alter a set not null;
alter table child alter a set not null;
-delete from parent;
-alter table only parent alter a set not null;
-insert into parent values (NULL);
-alter table child alter a set not null;
-insert into child (a, b) values (NULL, 'foo');
-delete from child;
-alter table child alter a set not null;
-insert into child (a, b) values (NULL, 'foo');
drop table child;
drop table parent;
\d ataddindex
DROP TABLE ataddindex;
+CREATE TABLE atnotnull1 ();
+ALTER TABLE atnotnull1
+ ADD COLUMN a INT,
+ ALTER a SET NOT NULL;
+ALTER TABLE atnotnull1
+ ADD COLUMN b INT,
+ ADD NOT NULL b;
+ALTER TABLE atnotnull1
+ ADD COLUMN c INT,
+ ADD PRIMARY KEY (c);
+SELECT conrelid::regclass, conname, contype, conkey,
+ (SELECT attname FROM pg_attribute WHERE attrelid = conrelid AND attnum = conkey[1]),
+ coninhcount, conislocal
+ FROM pg_constraint WHERE contype IN ('n','p') AND
+ conrelid IN ('atnotnull1'::regclass);
+
-- unsupported constraint types for partitioned tables
CREATE TABLE partitioned (
a int,
INSERT INTO ATACC1 (TEST2) VALUES (3);
DROP TABLE ATACC1 CASCADE;
+-- NOT NULL NO INHERIT
+CREATE TABLE ATACC1 (a int, not null a no inherit);
+CREATE TABLE ATACC2 () INHERITS (ATACC1);
+\d ATACC2
+DROP TABLE ATACC1, ATACC2;
+CREATE TABLE ATACC1 (a int);
+ALTER TABLE ATACC1 ADD NOT NULL a NO INHERIT;
+CREATE TABLE ATACC2 () INHERITS (ATACC1);
+\d ATACC2
+DROP TABLE ATACC1, ATACC2;
+
--
-- Check constraints on INSERT INTO
--
DROP TABLE deferred_excl;
+-- verify constraints created for NOT NULL clauses
+CREATE TABLE notnull_tbl1 (a INTEGER NOT NULL);
+\d notnull_tbl1
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+-- DROP NOT NULL gets rid of both the attnotnull flag and the constraint itself
+ALTER TABLE notnull_tbl1 ALTER a DROP NOT NULL;
+\d notnull_tbl1
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+-- SET NOT NULL puts both back
+ALTER TABLE notnull_tbl1 ALTER a SET NOT NULL;
+\d notnull_tbl1
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+-- Doing it twice doesn't create a redundant constraint
+ALTER TABLE notnull_tbl1 ALTER a SET NOT NULL;
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+-- Using the "table constraint" syntax also works
+ALTER TABLE notnull_tbl1 ALTER a DROP NOT NULL;
+ALTER TABLE notnull_tbl1 ADD CONSTRAINT foobar NOT NULL a;
+\d notnull_tbl1
+select conname, contype, conkey from pg_constraint where conrelid = 'notnull_tbl1'::regclass;
+DROP TABLE notnull_tbl1;
+
+CREATE TABLE notnull_tbl2 (a INTEGER PRIMARY KEY);
+ALTER TABLE notnull_tbl2 ALTER a DROP NOT NULL;
+
+CREATE TABLE notnull_tbl3 (a INTEGER NOT NULL, CHECK (a IS NOT NULL));
+ALTER TABLE notnull_tbl3 ALTER A DROP NOT NULL;
+ALTER TABLE notnull_tbl3 ADD b int, ADD CONSTRAINT pk PRIMARY KEY (a, b);
+\d notnull_tbl3
+ALTER TABLE notnull_tbl3 DROP CONSTRAINT pk;
+\d notnull_tbl3
+
-- Comments
-- Setup a low-level role to enforce non-superuser checks.
CREATE ROLE regress_constraint_comments;
CONSTRAINT check_b CHECK (b >= 0)
) FOR VALUES IN ('b');
-- conislocal should be false for any merged constraints, true otherwise
-SELECT conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass ORDER BY conislocal, coninhcount;
+SELECT conname, conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass ORDER BY coninhcount DESC, conname;
-- Once check_b is added to the parent, it should be made non-local for part_b
ALTER TABLE parted ADD CONSTRAINT check_b CHECK (b >= 0);
-SELECT conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass;
+SELECT conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass ORDER BY coninhcount DESC, conname;
-- Neither check_a nor check_b are droppable from part_b
ALTER TABLE part_b DROP CONSTRAINT check_a;
-- traditional inheritance where they will be left behind, because they would
-- be local constraints.
ALTER TABLE parted DROP CONSTRAINT check_a, DROP CONSTRAINT check_b;
-SELECT conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass;
+SELECT conname, conislocal, coninhcount FROM pg_constraint WHERE conrelid = 'part_b'::regclass ORDER BY coninhcount;
-- specify PARTITION BY for a partition
CREATE TABLE fail_part_col_not_found PARTITION OF parted FOR VALUES IN ('c') PARTITION BY RANGE (c);
alter table idxpart attach partition idxpart3 for values from (20, 20) to (30, 30);
select conname, contype, conrelid::regclass, conindid::regclass, conkey
from pg_constraint where conrelid::regclass::text like 'idxpart%'
- order by conname;
+ order by conrelid::regclass::text, conname;
drop table idxpart;
-- Verify that multi-layer partitioning honors the requirement that all
create table idxpart0 (like idxpart);
alter table idxpart0 add unique (a);
alter table idxpart attach partition idxpart0 default;
-alter table only idxpart add primary key (a); -- fail, no NOT NULL constraint
+alter table only idxpart add primary key (a); -- works, but idxpart0.a is nullable
+\d idxpart0
+alter index idxpart_pkey attach partition idxpart0_a_key; -- fails, lacks NOT NULL
alter table idxpart0 alter column a set not null;
-alter table only idxpart add primary key (a); -- now it works
+alter index idxpart_pkey attach partition idxpart0_a_key;
alter table idxpart0 alter column a drop not null; -- fail, pkey needs it
drop table idxpart;
select * from cnullparent where f1 = 2;
drop table cnullparent cascade;
+--
+-- Test inheritance of NOT NULL constraints
+--
+create table pp1 (f1 int);
+create table cc1 (f2 text, f3 int) inherits (pp1);
+\d cc1
+create table cc2(f4 float) inherits(pp1,cc1);
+\d cc2
+
+-- named NOT NULL constraint
+alter table cc1 add column a2 int constraint nn not null;
+\d cc1
+\d cc2
+alter table pp1 alter column f1 set not null;
+\d pp1
+\d cc1
+\d cc2
+
+-- have a look at pg_constraint
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('pp1'::regclass, 'cc1'::regclass, 'cc2'::regclass)
+ order by 2, 1;
+
+-- remove constraint from cc2: no dice, it's inherited
+alter table cc2 alter column a2 drop not null;
+
+-- remove constraint cc1, should succeed
+alter table cc1 alter column a2 drop not null;
+
+-- have a look at pg_constraint
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('pp1'::regclass, 'cc1'::regclass, 'cc2'::regclass)
+ order by 2, 1;
+
+-- same for cc2
+alter table cc2 alter column f1 drop not null;
+
+-- remove from cc1, should fail again
+alter table cc1 alter column f1 drop not null;
+
+-- remove from pp1, should succeed
+alter table pp1 alter column f1 drop not null;
+
+-- have a look at pg_constraint
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('pp1'::regclass, 'cc1'::regclass, 'cc2'::regclass)
+ order by 2, 1;
+
+drop table pp1 cascade;
+\d cc1
+\d cc2
+
+-- test "dropping" a not null constraint that's also inherited
+create table inh_parent (a int not null);
+create table inh_child (a int not null) inherits (inh_parent);
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal, connoinherit
+ from pg_constraint where contype in ('n','p') and
+ conrelid in ('inh_child'::regclass, 'inh_parent'::regclass);
+alter table inh_child alter a drop not null;
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal, connoinherit
+ from pg_constraint where contype in ('n','p') and
+ conrelid in ('inh_child'::regclass, 'inh_parent'::regclass);
+alter table inh_parent alter a drop not null;
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal, connoinherit
+ from pg_constraint where contype in ('n','p') and
+ conrelid in ('inh_child'::regclass, 'inh_parent'::regclass);
+drop table inh_parent, inh_child;
+
+-- NOT NULL NO INHERIT
+create table inh_parent(a int);
+create table inh_child() inherits (inh_parent);
+alter table inh_parent add not null a no inherit;
+create table inh_child2() inherits (inh_parent);
+select conrelid::regclass, conname, contype, conkey,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal, connoinherit
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent'::regclass, 'inh_child'::regclass, 'inh_child2'::regclass)
+ order by 2, 1;
+\d inh_parent
+\d inh_child
+\d inh_child2
+drop table inh_parent, inh_child, inh_child2;
+
+--
+-- test inherit/deinherit
+--
+create table inh_parent(f1 int);
+create table inh_child1(f1 int not null);
+create table inh_child2(f1 int);
+
+-- inh_child1 should have not null constraint
+alter table inh_child1 inherit inh_parent;
+
+-- should fail, missing NOT NULL constraint
+alter table inh_child2 inherit inh_child1;
+
+alter table inh_child2 alter column f1 set not null;
+alter table inh_child2 inherit inh_child1;
+
+-- add NOT NULL constraint recursively
+alter table inh_parent alter column f1 set not null;
+
+\d inh_parent
+\d inh_child1
+\d inh_child2
+
+select conrelid::regclass, conname, contype, coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent'::regclass, 'inh_child1'::regclass, 'inh_child2'::regclass)
+ order by 2, 1;
+
+--
+-- test deinherit procedure
+--
+
+-- deinherit inh_child1
+alter table inh_child1 no inherit inh_parent;
+\d inh_parent
+\d inh_child1
+\d inh_child2
+select conrelid::regclass, conname, contype, coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent'::regclass, 'inh_child1'::regclass, 'inh_child2'::regclass)
+ order by 2, 1;
+
+-- test inhcount of inh_child2, should fail
+alter table inh_child2 alter f1 drop not null;
+
+-- should succeed
+
+drop table inh_parent;
+drop table inh_child1 cascade;
+
+--
+-- test multi inheritance tree
+--
+create table inh_parent(f1 int not null);
+create table c1() inherits(inh_parent);
+create table c2() inherits(inh_parent);
+create table d1() inherits(c1, c2);
+
+-- show constraint info
+select conrelid::regclass, conname, contype, coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent'::regclass, 'c1'::regclass, 'c2'::regclass, 'd1'::regclass)
+ order by 2, 1;
+
+drop table inh_parent cascade;
+
+-- test child table with inherited columns and
+-- with explicitly specified not null constraints
+create table inh_parent_1(f1 int);
+create table inh_parent_2(f2 text);
+create table child(f1 int not null, f2 text not null) inherits(inh_parent_1, inh_parent_2);
+
+-- show constraint info
+select conrelid::regclass, conname, contype, coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid in ('inh_parent_1'::regclass, 'inh_parent_2'::regclass, 'child'::regclass)
+ order by 2, 1;
+
+-- also drops child table
+drop table inh_parent_1 cascade;
+drop table inh_parent_2;
+
+-- test multi layer inheritance tree
+create table inh_p1(f1 int not null);
+create table inh_p2(f1 int not null);
+create table inh_p3(f2 int);
+create table inh_p4(f1 int not null, f3 text not null);
+
+create table inh_multiparent() inherits(inh_p1, inh_p2, inh_p3, inh_p4);
+
+-- constraint on f1 should have three parents
+select conrelid::regclass, contype, conname,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid::regclass in ('inh_p1', 'inh_p2', 'inh_p3', 'inh_p4',
+ 'inh_multiparent')
+ order by 1, 2;
+
+create table inh_multiparent2 (a int not null, f1 int) inherits(inh_p3, inh_multiparent);
+select conrelid::regclass, contype, conname,
+ (select attname from pg_attribute where attrelid = conrelid and attnum = conkey[1]),
+ coninhcount, conislocal
+ from pg_constraint where contype = 'n' and
+ conrelid::regclass in ('inh_p3', 'inh_multiparent', 'inh_multiparent2')
+ order by 1, 2;
+
+drop table inh_p1, inh_p2, inh_p3, inh_p4 cascade;
+
--
-- Check use of temporary tables with inheritance trees
--
ATTACH PARTITION test_replica_identity4_1_pkey;
\d+ test_replica_identity4
+-- Dropping the primary key is not allowed if that would leave the replica
+-- identity as nullable
+CREATE TABLE test_replica_identity5 (a int not null, b int, c int,
+ PRIMARY KEY (b, c));
+CREATE UNIQUE INDEX test_replica_identity5_a_b_key ON test_replica_identity5 (a, b);
+ALTER TABLE test_replica_identity5 REPLICA IDENTITY USING INDEX test_replica_identity5_a_b_key;
+ALTER TABLE test_replica_identity5 DROP CONSTRAINT test_replica_identity5_pkey;
+ALTER TABLE test_replica_identity5 ALTER b SET NOT NULL;
+ALTER TABLE test_replica_identity5 DROP CONSTRAINT test_replica_identity5_pkey;
+ALTER TABLE test_replica_identity5 ALTER b DROP NOT NULL;
+
DROP TABLE test_replica_identity;
DROP TABLE test_replica_identity2;
DROP TABLE test_replica_identity3;
DROP TABLE test_replica_identity4;
+DROP TABLE test_replica_identity5;
DROP TABLE test_replica_identity_othertable;
projects / postgresql-pgindent.git / commitdiff