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Bug #11784056 ENABLE CONCURRENT READS WHILE CREATING

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NON-PRIMARY UNIQUE INDEX USING INNODB

This patch adds the HA_INPLACE_ADD_UNIQUE_INDEX_NO_WRITE
capability flag to InnoDB, indicating that concurrent reads
can be allowed while non-primary unique indexes are created.

This is an follow-up to Bug #11751388 which enabled concurrent
reads when creating non-primary non-unique indexes.

Test case added to innodb_mysql_sync.test.
This commit is contained in:
Jon Olav Hauglid
2011-03-07 14:30:49 +01:00
parent c2dc4b022a
commit c171d99ded
3 changed files with 23 additions and 15 deletions
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10
mysql-test/r/innodb_mysql_sync.result
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@ -153,5 +153,15 @@ SET DEBUG_SYNC= "now SIGNAL query";
a b
# Test 4: Secondary unique index, should not block reads.
# Connection default
SET DEBUG_SYNC= "alter_table_manage_keys SIGNAL manage WAIT_FOR query";
# Sending:
ALTER TABLE t1 ADD UNIQUE (b);
# Connection con1
SET DEBUG_SYNC= "now WAIT_FOR manage";
SELECT * FROM t1;
a b
SET DEBUG_SYNC= "now SIGNAL query";
# Connection default
# Reaping: ALTER TABLE t1 ADD UNIQUE (b)
SET DEBUG_SYNC= "RESET";
DROP TABLE t1;