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branches/5.1: Copy the maximum AUTOINC value from the old table to the new

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table when MySQL does a CREATE INDEX ON T. This is required because MySQL
does a table copy, rename and drops the old table.
Fix Bug#47125: auto_increment start value is ignored if an index is created and engine=innodb
rb://168
This commit is contained in:
sunny
2009-10-12 03:37:49 +00:00
parent c8bc16ac83
commit 35c0f9ce93
3 changed files with 40 additions and 10 deletions
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22
handler/ha_innodb.cc
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@ -5510,18 +5510,22 @@ ha_innobase::create(
setup at this stage and so we use thd. */ setup at this stage and so we use thd. */
/* We need to copy the AUTOINC value from the old table if /* We need to copy the AUTOINC value from the old table if
this is an ALTER TABLE. */ this is an ALTER TABLE or CREATE INDEX because CREATE INDEX
does a table copy too. */
if (((create_info->used_fields & HA_CREATE_USED_AUTO) if (((create_info->used_fields & HA_CREATE_USED_AUTO)
|| thd_sql_command(thd) == SQLCOM_ALTER_TABLE) || thd_sql_command(thd) == SQLCOM_ALTER_TABLE
&& create_info->auto_increment_value != 0) { || thd_sql_command(thd) == SQLCOM_CREATE_INDEX)
&& create_info->auto_increment_value > 0) {
/* Query was ALTER TABLE...AUTO_INCREMENT = x; or /* Query was one of :
CREATE TABLE ...AUTO_INCREMENT = x; Find out a table CREATE TABLE ...AUTO_INCREMENT = x; or
definition from the dictionary and get the current value ALTER TABLE...AUTO_INCREMENT = x; or
of the auto increment field. Set a new value to the CREATE INDEX x on t(...);
auto increment field if the value is greater than the Find out a table definition from the dictionary and get
maximum value in the column. */ the current value of the auto increment field. Set a new
value to the auto increment field if the value is greater
than the maximum value in the column. */
auto_inc_value = create_info->auto_increment_value; auto_inc_value = create_info->auto_increment_value;

15
mysql-test/innodb-autoinc.result
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@ -1111,3 +1111,18 @@ c1 c2
3 innodb 3 innodb
4 NULL 4 NULL
DROP TABLE t1; DROP TABLE t1;
CREATE TABLE T1 (c1 INT AUTO_INCREMENT, c2 INT, PRIMARY KEY(c1)) AUTO_INCREMENT=10 ENGINE=InnoDB;
CREATE INDEX i1 on T1(c2);
SHOW CREATE TABLE T1;
Table Create Table
T1 CREATE TABLE `T1` (
`c1` int(11) NOT NULL AUTO_INCREMENT,
`c2` int(11) DEFAULT NULL,
PRIMARY KEY (`c1`),
KEY `i1` (`c2`)
) ENGINE=InnoDB AUTO_INCREMENT=10 DEFAULT CHARSET=latin1
INSERT INTO T1 (c2) values (0);
SELECT * FROM T1;
c1 c2
10 0
DROP TABLE T1;

13
mysql-test/innodb-autoinc.test
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@ -607,5 +607,16 @@ INSERT INTO t1 VALUES (NULL, NULL);
SHOW CREATE TABLE t1; SHOW CREATE TABLE t1;
SELECT * FROM t1; SELECT * FROM t1;
DROP TABLE t1; DROP TABLE t1;
#
# End negative number check # End negative number check
##
# 47125: auto_increment start value is ignored if an index is created
# and engine=innodb
#
CREATE TABLE T1 (c1 INT AUTO_INCREMENT, c2 INT, PRIMARY KEY(c1)) AUTO_INCREMENT=10 ENGINE=InnoDB;
CREATE INDEX i1 on T1(c2);
SHOW CREATE TABLE T1;
INSERT INTO T1 (c2) values (0);
SELECT * FROM T1;
DROP TABLE T1;