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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.


mysql-test/r/handler_myisam.result:
  Fix for bug #46456 [Ver->Prg]: HANDLER OPEN + TRUNCATE + DROP
  (temporary) TABLE, crash
    - test result.
mysql-test/t/handler_myisam.test:
  Fix for bug #46456 [Ver->Prg]: HANDLER OPEN + TRUNCATE + DROP
  (temporary) TABLE, crash
    - test case.
sql/sql_delete.cc:
  Fix for bug #46456 [Ver->Prg]: HANDLER OPEN + TRUNCATE + DROP
   (temporary) TABLE, crash
    - remove all truncated tables from the HANDLER's hash.
This commit is contained in:
Ramil Kalimullin
2009-08-21 10:55:35 +05:00
parent 1317d24b33
commit fb9ba3734b
3 changed files with 39 additions and 0 deletions
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19
mysql-test/t/handler_myisam.test
View File

@ -19,3 +19,22 @@ let $other_engine_type= MEMORY;
let $other_handler_engine_type= MyISAM;
--source include/handler.inc
--echo #
--echo # BUG #46456: HANDLER OPEN + TRUNCATE + DROP (temporary) TABLE, crash
--echo #
CREATE TABLE t1 AS SELECT 1 AS f1;
HANDLER t1 OPEN;
TRUNCATE t1;
--error ER_UNKNOWN_TABLE
HANDLER t1 READ FIRST;
DROP TABLE t1;
CREATE TEMPORARY TABLE t1 AS SELECT 1 AS f1;
HANDLER t1 OPEN;
TRUNCATE t1;
--error ER_UNKNOWN_TABLE
HANDLER t1 READ FIRST;
DROP TABLE t1;
--echo End of 5.1 tests