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Fix for bug #46456 [Ver->Prg]: HANDLER OPEN + TRUNCATE + DROP

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(temporary) TABLE, crash

Problem: if one has an open "HANDLER t1", further "TRUNCATE t1" 
doesn't close the handler and leaves handler table hash in an 
inconsistent state, that may lead to a server crash.

Fix: TRUNCATE should implicitly close all open handlers.

Doc. request: the fact should be described in the manual accordingly.
This commit is contained in:
Ramil Kalimullin
2009-08-21 10:55:35 +05:00
parent f4676ae522
commit f59400f4c3
3 changed files with 39 additions and 0 deletions
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16
mysql-test/r/handler_myisam.result
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@@ -741,3 +741,19 @@ USE information_schema;
HANDLER COLUMNS OPEN;
ERROR HY000: Incorrect usage of HANDLER OPEN and information_schema
USE test;
#
# BUG #46456: HANDLER OPEN + TRUNCATE + DROP (temporary) TABLE, crash
#
CREATE TABLE t1 AS SELECT 1 AS f1;
HANDLER t1 OPEN;
TRUNCATE t1;
HANDLER t1 READ FIRST;
ERROR 42S02: Unknown table 't1' in HANDLER
DROP TABLE t1;
CREATE TEMPORARY TABLE t1 AS SELECT 1 AS f1;
HANDLER t1 OPEN;
TRUNCATE t1;
HANDLER t1 READ FIRST;
ERROR 42S02: Unknown table 't1' in HANDLER
DROP TABLE t1;
End of 5.1 tests