Bug #58621 perfschema.dml_ews_by_thread_by_event_name test failure

Description:
Seen in mysql-trunk-stage:

perfschema.dml_ews_by_thread_by_event_name [ fail ]
        Test ended at 2010-11-30 20:41:14

CURRENT_TEST: perfschema.dml_ews_by_thread_by_event_name
--- /export/home/pb2/test/sb_1-2613083-1291143967.39/mysql-5.6.1-m5-freebsd7.0-i386-test/mysql-test/suite/perfschema/r/dml_ews_by_thread_by_event_name.result	2010-11-30 17:37:33.000000000 +0300
+++ /export/home/pb2/test/sb_1-2613083-1291143967.39/mysql-5.6.1-m5-freebsd7.0-i386-test/mysql-test/suite/perfschema/r/dml_ews_by_thread_by_event_name.reject	2010-11-30 22:41:13.000000000 +0300
@@ -1,7 +1,6 @@
 select * from performance_schema.events_waits_summary_by_thread_by_event_name
 where event_name like 'Wait/Synch/%' limit 1;
 THREAD_ID	EVENT_NAME	COUNT_STAR	SUM_TIMER_WAIT	MIN_TIMER_WAIT	AVG_TIMER_WAIT	MAX_TIMER_WAIT
-#	#	#	#	#	#	#
 select * from performance_schema.events_waits_summary_by_thread_by_event_name
 where event_name='FOO';
 THREAD_ID	EVENT_NAME	COUNT_STAR	SUM_TIMER_WAIT	MIN_TIMER_WAIT	AVG_TIMER_WAIT	MAX_TIMER_WAIT

mysqltest: Result content mismatch

 - saving '/export/home/pb2/test/sb_1-2613083-1291143967.39/mysql-5.6.1-m5-freebsd7.0-i386-test/mysql-test/var-n_mix/log/perfschema.dml_ews_by_thread_by_event_name/' to '/export/home/pb2/test/sb_1-2613083-1291143967.39/mysql-5.6.1-m5-freebsd7.0-i386-test/mysql-test/var-n_mix/log/perfschema.dml_ews_by_thread_by_event_name/'

Retrying test perfschema.dml_ews_by_thread_by_event_name, attempt(2/3)...

perfschema.dml_ews_by_thread_by_event_name [ retry-fail ]
        Test ended at 2010-11-30 20:41:20

Problem:
using the construct:

--replace_column 1 # 2 # 3 # 4 # 5 # 6 # 7 #
select * from performance_schema.events_waits_summary_by_thread_by_event_name
  where event_name like 'Wait/Synch/%' limit 1;

is too sensitive to the table content, which is not the point of the test.

This is a test script issue.

How to repeat:
N/A

Suggested fix:
Fix the script to use --disable_query_log instead, for all the dml_*.test scripts: this will make the test script more robust.

A patch for this bug has been committed. After review, it may
be pushed to the relevant source trees for release in the next
version. You can access the patch from:

  http://lists.mysql.com/commits/125604

3158 Marc Alff	2010-12-01
      Bug#58621 perfschema.dml_ews_by_thread_by_event_name test failure
      
      This fix affects the test suite only.
      
      Before this fix, performance schema tests dml_*.test could
      fail with spurious failure, depending on the table content.
      
      This fix simplifies the SELECT tests in the dml_*.test scripts,
      to only verify that the SELECT operation passed the security checks
      and succeeded, which was the original intent of the test.
      
      Usage of 
        --replace_column 1 # 2 # 3 # 4 # ...
      to discard the test output was replaced by a simpler and more maintainable 
        --disable_result_log
      which also work for empty tables.

Patch approved.

Pushed into:
- mysql-5.5-bugteam
- mysql-trunk-bugfixing

Pushed into mysql-trunk 5.6.1 (revid:alexander.nozdrin@oracle.com-20101205122447-6x94l4fmslpbttxj) (version source revid:alexander.nozdrin@oracle.com-20101205122447-6x94l4fmslpbttxj) (merge vers: 5.6.1) (pib:23)

Changes to test suite. No changelog entry needed.

Pushed into mysql-5.5 5.5.9 (revid:georgi.kodinov@oracle.com-20101217124733-p1ivu6higouawv8l) (version source revid:marc.alff@oracle.com-20101201080104-j851s2tsdj1rarr6) (merge vers: 5.5.8) (pib:24)