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BUG#21096: locking issue ; temporary table conflicts.

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The problem was that during DROP TEMPORARY TABLE we tried to acquire
the name lock, though temporary tables belongs to one connection, and
no race is possible.

The solution is to not use table name locking while executing
DROP TEMPORARY TABLE.


mysql-test/r/temp_table.result:
  Add result for bug#21096: locking issue ; temporary table conflicts.
mysql-test/t/temp_table.test:
  Add test case for bug#21096: locking issue ; temporary table conflicts.
sql/sql_table.cc:
  Do not use table name locking while executing DROP TEMPORARY TABLE.
This commit is contained in:
unknown
2006-08-29 16:59:20 +04:00
parent 04d60b3897
commit 4ed1ce6f58
3 changed files with 67 additions and 3 deletions
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17
mysql-test/r/temp_table.result
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@ -108,3 +108,20 @@ d c
bar 2
foo 1
drop table t1, t2;
DROP TABLE IF EXISTS t1;
CREATE TABLE t1 (i INT);
LOCK TABLE t1 WRITE;
CREATE TEMPORARY TABLE t1 (i INT);
The following command should not block
DROP TEMPORARY TABLE t1;
DROP TABLE t1;
CREATE TABLE t1 (i INT);
CREATE TEMPORARY TABLE t2 (i INT);
DROP TEMPORARY TABLE t2, t1;
ERROR 42S02: Unknown table 't1'
SELECT * FROM t2;
ERROR 42S02: Table 'test.t2' doesn't exist
SELECT * FROM t1;
i
DROP TABLE t1;
End of 4.1 tests.