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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
View File

@ -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;

27
mysql-test/t/innodb_mysql_sync.test
View File

@ -253,26 +253,23 @@ connection con1;
--reap
--echo # Test 4: Secondary unique index, should not block reads.
# This requires HA_INPLACE_ADD_UNIQUE_INDEX_NO_WRITE to be supported
# by InnoDB. Adding this flag currently introduces a regression so
# this test is disabled until the regression has been fixed.
--echo # Connection default
connection default;
#SET DEBUG_SYNC= "alter_table_manage_keys SIGNAL manage WAIT_FOR query";
#--echo # Sending:
#--send ALTER TABLE t1 ADD UNIQUE (b)
SET DEBUG_SYNC= "alter_table_manage_keys SIGNAL manage WAIT_FOR query";
--echo # Sending:
--send ALTER TABLE t1 ADD UNIQUE (b)
#--echo # Connection con1
#connection con1;
#SET DEBUG_SYNC= "now WAIT_FOR manage";
#SELECT * FROM t1;
#SET DEBUG_SYNC= "now SIGNAL query";
--echo # Connection con1
connection con1;
SET DEBUG_SYNC= "now WAIT_FOR manage";
SELECT * FROM t1;
SET DEBUG_SYNC= "now SIGNAL query";
#--echo # Connection default
#connection default;
#--echo # Reaping: ALTER TABLE t1 ADD UNIQUE (b)
#--reap
--echo # Connection default
connection default;
--echo # Reaping: ALTER TABLE t1 ADD UNIQUE (b)
--reap
disconnect con1;
disconnect con2;

1
storage/innobase/handler/ha_innodb.cc
View File

@ -2597,6 +2597,7 @@ innobase_alter_table_flags(
| HA_INPLACE_ADD_INDEX_NO_WRITE
| HA_INPLACE_DROP_INDEX_NO_READ_WRITE
| HA_INPLACE_ADD_UNIQUE_INDEX_NO_READ_WRITE
| HA_INPLACE_ADD_UNIQUE_INDEX_NO_WRITE
| HA_INPLACE_DROP_UNIQUE_INDEX_NO_READ_WRITE
| HA_INPLACE_ADD_PK_INDEX_NO_READ_WRITE);
}