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Bug#30837086 : SELECT FROM I_S.INNODB_COLUMNS IS SLOW IN 8.0
 Post push fix. Reviewed by : DEBARUN BANERJEE <[email protected]>
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‎mysql-test/suite/innodb/r/partition_debug.result‎

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#
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# Test that INFORMATION_SCHEMA.INNODB_COLUMNS shows warning
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# if the table is dropped while filling metadata
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#
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CREATE TABLE t_part (a INT PRIMARY KEY, b INT, c VARCHAR(64))
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PARTITION BY HASH (a) PARTITIONS 5;
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SELECT lower(t.name), lower(c.name) FROM
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INFORMATION_SCHEMA.INNODB_COLUMNS c
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JOIN INFORMATION_SCHEMA.INNODB_TABLES t
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WHERE t.table_id = c.table_id AND t.name LIKE '%t_part%'
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ORDER BY t.name, c.name;
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lower(t.name) lower(c.name)
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test/t_part#p#p0 a
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test/t_part#p#p0 b
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test/t_part#p#p0 c
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test/t_part#p#p1 a
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test/t_part#p#p1 b
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test/t_part#p#p1 c
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test/t_part#p#p2 a
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test/t_part#p#p2 b
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test/t_part#p#p2 c
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test/t_part#p#p3 a
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test/t_part#p#p3 b
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test/t_part#p#p3 c
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test/t_part#p#p4 a
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test/t_part#p#p4 b
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test/t_part#p#p4 c
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SET DEBUG_SYNC = 'RESET';
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SET DEBUG='+d,do_before_filling_i_s_innodb_columns';
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SET DEBUG_SYNC='wait_before_filling_i_s_innodb_columns SIGNAL parked WAIT_FOR go';
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SELECT lower(t.name), lower(c.name) FROM
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INFORMATION_SCHEMA.INNODB_COLUMNS c
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JOIN INFORMATION_SCHEMA.INNODB_TABLES t
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WHERE t.table_id = c.table_id AND t.name LIKE '%t_part%'
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ORDER BY t.name, c.name;
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SET DEBUG_SYNC='now WAIT_FOR parked';
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SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST;
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COUNT(*)
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3
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DROP TABLE t_part;
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SET DEBUG_SYNC='now SIGNAL go';
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lower(t.name) lower(c.name)
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SHOW WARNINGS;
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Level Code Message
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Pattern "Unable to open innodb table with id = .* in the data dictionary." found
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SET DEBUG_SYNC='RESET';
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SET DEBUG='-d,do_before_filling_i_s_innodb_columns';
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#
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# Test that INFORMATION_SCHEMA.INNODB_COLUMNS shows warning
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# if the table is locked while filling metadata
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#
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CREATE TABLE t_nopart (a INT PRIMARY KEY, b INT, c VARCHAR(64));
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INSERT INTO t_nopart VALUES (1, 1, 'v');
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SET DEBUG='+d,do_before_filling_i_s_innodb_columns';
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SET DEBUG_SYNC='wait_before_filling_i_s_innodb_columns SIGNAL parked1 WAIT_FOR go1';
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SET SESSION lock_wait_timeout=1;
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SELECT lower(t.name), lower(c.name) FROM
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INFORMATION_SCHEMA.INNODB_COLUMNS c
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JOIN INFORMATION_SCHEMA.INNODB_TABLES t
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WHERE t.table_id = c.table_id AND t.name LIKE '%t_nopart%'
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ORDER BY t.name, c.name;
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SET DEBUG_SYNC='now WAIT_FOR parked1';
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SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST;
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COUNT(*)
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3
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SET DEBUG_SYNC='mysql_rm_table_after_lock_table_names SIGNAL parked2 WAIT_FOR go2';
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DROP TABLE t_nopart;
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SET DEBUG_SYNC='now WAIT_FOR parked2';
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SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST;
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COUNT(*)
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4
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SET DEBUG_SYNC='now SIGNAL go1';
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ERROR HY000: Lock wait timeout exceeded; try restarting transaction
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SHOW WARNINGS;
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Level Code Message
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Error 1205 Lock wait timeout exceeded; try restarting transaction
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Warning 1205 Lock wait timeout exceeded; try restarting transaction
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SET DEBUG_SYNC='now SIGNAL go2';
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SET SESSION lock_wait_timeout=default;
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SET DEBUG='-d,do_before_filling_i_s_innodb_columns';
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# Different partitions can have different row format
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# Case one: between dynamic and redundant
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#

‎mysql-test/suite/innodb/t/partition_debug.test‎

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--source include/have_innodb_max_16k.inc
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--source include/have_debug_sync.inc
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--echo #
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--echo # Test that INFORMATION_SCHEMA.INNODB_COLUMNS shows warning
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--echo # if the table is dropped while filling metadata
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--echo #
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--disable_query_log
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CALL mtr.add_suppression("Unable to open innodb table with id = .* in the data dictionary.");
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--enable_query_log
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CREATE TABLE t_part (a INT PRIMARY KEY, b INT, c VARCHAR(64))
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PARTITION BY HASH (a) PARTITIONS 5;
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SELECT lower(t.name), lower(c.name) FROM
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INFORMATION_SCHEMA.INNODB_COLUMNS c
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JOIN INFORMATION_SCHEMA.INNODB_TABLES t
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WHERE t.table_id = c.table_id AND t.name LIKE '%t_part%'
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ORDER BY t.name, c.name;
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SET DEBUG_SYNC = 'RESET';
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SET DEBUG='+d,do_before_filling_i_s_innodb_columns';
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SET DEBUG_SYNC='wait_before_filling_i_s_innodb_columns SIGNAL parked WAIT_FOR go';
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SEND SELECT lower(t.name), lower(c.name) FROM
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INFORMATION_SCHEMA.INNODB_COLUMNS c
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JOIN INFORMATION_SCHEMA.INNODB_TABLES t
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WHERE t.table_id = c.table_id AND t.name LIKE '%t_part%'
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ORDER BY t.name, c.name;
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CONNECT (con1, localhost, root,,);
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SET DEBUG_SYNC='now WAIT_FOR parked';
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SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST;
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DROP TABLE t_part;
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SET DEBUG_SYNC='now SIGNAL go';
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CONNECTION default;
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--reap
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SHOW WARNINGS;
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# Search the warning message in the error file
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--let SEARCH_FILE=$MYSQLTEST_VARDIR/log/mysqld.1.err
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--let SEARCH_PATTERN= Unable to open innodb table with id = .* in the data dictionary.
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--source include/search_pattern.inc
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DISCONNECT con1;
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SET DEBUG_SYNC='RESET';
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SET DEBUG='-d,do_before_filling_i_s_innodb_columns';
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--echo #
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--echo # Test that INFORMATION_SCHEMA.INNODB_COLUMNS shows warning
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--echo # if the table is locked while filling metadata
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--echo #
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CREATE TABLE t_nopart (a INT PRIMARY KEY, b INT, c VARCHAR(64));
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INSERT INTO t_nopart VALUES (1, 1, 'v');
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SET DEBUG='+d,do_before_filling_i_s_innodb_columns';
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SET DEBUG_SYNC='wait_before_filling_i_s_innodb_columns SIGNAL parked1 WAIT_FOR go1';
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SET SESSION lock_wait_timeout=1;
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SEND SELECT lower(t.name), lower(c.name) FROM
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INFORMATION_SCHEMA.INNODB_COLUMNS c
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JOIN INFORMATION_SCHEMA.INNODB_TABLES t
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WHERE t.table_id = c.table_id AND t.name LIKE '%t_nopart%'
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ORDER BY t.name, c.name;
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CONNECT (con2, localhost, root,,);
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SET DEBUG_SYNC='now WAIT_FOR parked1';
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SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST;
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SET DEBUG_SYNC='mysql_rm_table_after_lock_table_names SIGNAL parked2 WAIT_FOR go2';
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SEND DROP TABLE t_nopart;
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CONNECT (con3, localhost, root,,);
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SET DEBUG_SYNC='now WAIT_FOR parked2';
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SELECT COUNT(*) FROM INFORMATION_SCHEMA.PROCESSLIST;
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SET DEBUG_SYNC='now SIGNAL go1';
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CONNECTION default;
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--error 1205
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--reap
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# There will be an error and a warning because the MDL lock is held
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# at two different places while filling metadata
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SHOW WARNINGS;
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SET DEBUG_SYNC='now SIGNAL go2';
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CONNECTION con2;
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--reap
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DISCONNECT con2;
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DISCONNECT con3;
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CONNECTION default;
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SET SESSION lock_wait_timeout=default;
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SET DEBUG='-d,do_before_filling_i_s_innodb_columns';
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--echo # Different partitions can have different row format
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--echo # Case one: between dynamic and redundant
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--echo #

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