Bug #17299181 CREATE_TIME AND UPDATE_TIME ARE WRONG FOR PARTITIONED TABLES

PROBLEM

Create time is calculated as last status change time of .frm file.
The first problem was that innodb was passing file name as
"table_name#po#p0.frm" to the stat() call which calculates the create time.
Since there is no frm file with this name create_time will be stored as NULL.
The second problem is ha_partition::info() updates stats for create time
when HA_STATUS_CONST flag was set ,where as innodb calculates this statistic
when HA_STATUS_TIME is set,which causes create_time to be set as NULL.

Fix
Pass proper .frm name to stat() call and calculate create time when
HA_STATUS_CONST flag is set.

Author: aditya

mysql-test/r/partition_innodb.result

@@ -365,33 +365,33 @@ DROP TABLE t1;
 create table t1 (a int) engine=innodb partition by hash(a) ;
 show table status like 't1';
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	InnoDB	10	Compact	2	8192	16384	0	0	#	NULL	NULL	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
+t1	InnoDB	10	Compact	2	8192	16384	0	0	#	NULL	#	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
 drop table t1;
 create table t1 (a int)
 engine = innodb
 partition by key (a);
 show table status;
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	InnoDB	10	Compact	2	8192	16384	0	0	#	NULL	NULL	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
+t1	InnoDB	10	Compact	2	8192	16384	0	0	#	NULL	#	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
 insert into t1 values (0), (1), (2), (3);
 show table status;
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	InnoDB	10	Compact	4	4096	16384	0	0	#	NULL	NULL	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
+t1	InnoDB	10	Compact	4	4096	16384	0	0	#	NULL	#	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
 drop table t1;
 create table t1 (a int auto_increment primary key)
 engine = innodb
 partition by key (a);
 show table status;
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	InnoDB	10	Compact	2	8192	16384	0	0	#	1	NULL	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
+t1	InnoDB	10	Compact	2	8192	16384	0	0	#	1	#	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
 insert into t1 values (NULL), (NULL), (NULL), (NULL);
 show table status;
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	InnoDB	10	Compact	4	4096	16384	0	0	#	5	NULL	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
+t1	InnoDB	10	Compact	4	4096	16384	0	0	#	5	#	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
 insert into t1 values (NULL), (NULL), (NULL), (NULL);
 show table status;
 Name	Engine	Version	Row_format	Rows	Avg_row_length	Data_length	Max_data_length	Index_length	Data_free	Auto_increment	Create_time	Update_time	Check_time	Collation	Checksum	Create_options	Comment
-t1	InnoDB	10	Compact	8	2048	16384	0	0	#	9	NULL	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
+t1	InnoDB	10	Compact	8	2048	16384	0	0	#	9	#	NULL	NULL	latin1_swedish_ci	NULL	partitioned	
 drop table t1;
 create table t1 (a int)
 partition by key (a)
@@ -572,3 +572,14 @@ a	b
 1	2
 0	1
 DROP TABLE t1;
+#
+# Bug #17299181  CREATE_TIME AND UPDATE_TIME ARE
+#                WRONG FOR PARTITIONED TABLES
+#
+CREATE TABLE t1 (a int, PRIMARY KEY (a)) ENGINE=InnoDB
+PARTITION BY HASH (a) PARTITIONS 2;
+SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE
+CREATE_TIME IS NOT NULL AND TABLE_NAME='t1';
+COUNT(*)
+1
+DROP TABLE t1;

mysql-test/t/partition_innodb.test

@@ -387,7 +387,7 @@ DROP TABLE t1;
 create table t1 (a int) engine=innodb partition by hash(a) ;
 # Data_free for InnoDB tablespace varies depending on which
 # tests have been run before this one
---replace_column 10 #
+--replace_column 10 # 12 #
 show table status like 't1';
 drop table t1;
 
@@ -399,12 +399,12 @@ engine = innodb
 partition by key (a);
 # Data_free for InnoDB tablespace varies depending on which
 # tests have been run before this one
---replace_column 10 #
+--replace_column 10 # 12 #
 show table status;
 insert into t1 values (0), (1), (2), (3);
 # Data_free for InnoDB tablespace varies depending on which
 # tests have been run before this one
---replace_column 10 #
+--replace_column 10 # 12 #
 show table status;
 drop table t1;
 
@@ -413,17 +413,17 @@ engine = innodb
 partition by key (a);
 # Data_free for InnoDB tablespace varies depending on which
 # tests have been run before this one
---replace_column 10 #
+--replace_column 10 # 12 #
 show table status;
 insert into t1 values (NULL), (NULL), (NULL), (NULL);
 # Data_free for InnoDB tablespace varies depending on which
 # tests have been run before this one
---replace_column 10 #
+--replace_column 10 # 12 #
 show table status;
 insert into t1 values (NULL), (NULL), (NULL), (NULL);
 # Data_free for InnoDB tablespace varies depending on which
 # tests have been run before this one
---replace_column 10 #
+--replace_column 10 # 12 #
 show table status;
 drop table t1;
 
@@ -660,3 +660,15 @@ ALTER TABLE t1 ADD UNIQUE KEY (b);
 SHOW CREATE TABLE t1;
 SELECT * FROM t1;
 DROP TABLE t1;
+--echo #
+--echo # Bug #17299181  CREATE_TIME AND UPDATE_TIME ARE
+--echo #                WRONG FOR PARTITIONED TABLES
+--echo #
+
+CREATE TABLE t1 (a int, PRIMARY KEY (a)) ENGINE=InnoDB
+PARTITION BY HASH (a) PARTITIONS 2;
+
+SELECT COUNT(*) FROM INFORMATION_SCHEMA.TABLES WHERE
+CREATE_TIME IS NOT NULL AND TABLE_NAME='t1';
+
+DROP TABLE t1;

storage/innobase/handler/ha_innodb.cc

@@ -8172,17 +8172,6 @@ ha_innobase::info_low(
 			prebuilt->trx->op_info = "returning various info to MySQL";
 		}
 
-		my_snprintf(path, sizeof(path), "%s/%s%s",
-				mysql_data_home, ib_table->name, reg_ext);
-
-		unpack_filename(path,path);
-
-		/* Note that we do not know the access time of the table,
-		nor the CHECK TABLE time, nor the UPDATE or INSERT time. */
-
-		if (os_file_get_status(path,&stat_info)) {
-			stats.create_time = (ulong) stat_info.ctime;
-		}
 	}
 
 	if (flag & HA_STATUS_VARIABLE) {
@@ -8379,6 +8368,20 @@ ha_innobase::info_low(
 		}
 
 		dict_table_stats_unlock(ib_table, RW_S_LATCH);
+
+		my_snprintf(path, sizeof(path), "%s/%s%s",
+			    mysql_data_home,
+			    table->s->normalized_path.str,
+			    reg_ext);
+
+		unpack_filename(path,path);
+
+		/* Note that we do not know the access time of the table,
+		nor the CHECK TABLE time, nor the UPDATE or INSERT time. */
+
+		if (os_file_get_status(path,&stat_info)) {
+			stats.create_time = (ulong) stat_info.ctime;
+		}
 	}
 
 	if (srv_force_recovery >= SRV_FORCE_NO_IBUF_MERGE) {