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Bug#42643: InnoDB does not support replication of TRUNCATE TABLE

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The problem was that TRUNCATE TABLE didn't take a exclusive
lock on a table if it resorted to truncating via delete of
all rows in the table. Specifically for InnoDB tables, this
could break proper isolation as InnoDB ends up aborting some
granted locks when truncating a table.

The solution is to take a exclusive metadata lock before
TRUNCATE TABLE can proceed. This guarantees that no other
transaction is using the table.

Incompatible change: Truncate via delete no longer fails
if sql_safe_updates is activated (this was a undocumented
side effect).
This commit is contained in:
Davi Arnaut
2010-05-25 17:01:38 -03:00
parent a3c080be7a
commit 3c279d9a5a
38 changed files with 1471 additions and 441 deletions
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8
mysql-test/r/truncate.result
View File

@ -99,7 +99,7 @@ LOCK TABLE t1 WRITE;
SELECT * FROM v1;
ERROR HY000: Table 'v1' was not locked with LOCK TABLES
TRUNCATE v1;
ERROR 42S02: Table 'test.v1' doesn't exist
ERROR HY000: Table 'v1' was not locked with LOCK TABLES
SELECT * FROM v1;
ERROR HY000: Table 'v1' was not locked with LOCK TABLES
UNLOCK TABLES;
@ -107,7 +107,7 @@ LOCK TABLE t1 WRITE, t2 WRITE;
SELECT * FROM v1;
ERROR HY000: Table 'v1' was not locked with LOCK TABLES
TRUNCATE v1;
ERROR 42S02: Table 'test.v1' doesn't exist
ERROR HY000: Table 'v1' was not locked with LOCK TABLES
SELECT * FROM v1;
ERROR HY000: Table 'v1' was not locked with LOCK TABLES
UNLOCK TABLES;
@ -117,7 +117,7 @@ c1
1
3
TRUNCATE v1;
ERROR 42S02: Table 'test.v1' doesn't exist
ERROR HY000: Table 'v1' was not locked with LOCK TABLES
SELECT * FROM v1;
c1
1
@ -129,7 +129,7 @@ c1
1
3
TRUNCATE v1;
ERROR 42S02: Table 'test.v1' doesn't exist
ERROR HY000: Table 'v1' was not locked with LOCK TABLES
SELECT * FROM v1;
c1
1