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Fix for bug lp:1039277 "Crash in sql_cache.cc".

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The crash happend when combining query cache, prepared statements and using a read only cursor.

sql/sql_cache.cc:
  Fixed unlikely error when one adjust query cache size in middle of operation
sql/sql_cursor.cc:
  Disable query cache when using cursors. This fixed lp:1039277
tests/mysql_client_test.c:
  Test case for lp:1039277
This commit is contained in:
Michael Widenius
2012-08-21 08:46:32 +03:00
parent 75e8ce6d73
commit a45c451e40
3 changed files with 52 additions and 0 deletions
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2
sql/sql_cursor.cc
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@@ -115,6 +115,8 @@ int mysql_open_cursor(THD *thd, select_result *result,
&thd->security_ctx->priv_user[0],
(char *) thd->security_ctx->host_or_ip,
2);
/* Mark that we can't use query cache with cursors */
thd->query_cache_is_applicable= 0;
rc= mysql_execute_command(thd);
MYSQL_QUERY_EXEC_DONE(rc);