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Fixed issue with slow query logging where examined rows where wrong

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Reset 'examined_rows_count' in union to not count same rows twice

mysql-test/r/subselect_mat_cost.result:
  Test also slow query logging
mysql-test/t/subselect_mat_cost.test:
  Test also slow query logging
sql/sql_union.cc:
  Reset 'examined_rows_count' in union to not count same rows twice
This commit is contained in:
Michael Widenius 2011-09-23 13:55:01 +03:00
parent 22e793639a
commit f0c6ce9ade
3 changed files with 7 additions and 0 deletions
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1
mysql-test/r/subselect_mat_cost.result
View file

@ -1,5 +1,6 @@
set @subselect_mat_cost=@@optimizer_switch;
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
set log_slow_time=0.1;
TEST GROUP 1:
Typical cases of in-to-exists and materialization subquery strategies
=====================================================================

5
mysql-test/t/subselect_mat_cost.test
View file

@ -15,6 +15,11 @@
set @subselect_mat_cost=@@optimizer_switch;
set optimizer_switch='mrr=on,mrr_sort_keys=on,index_condition_pushdown=on';
#
# Test logging to slow log (there was some errors in the log files about
# the slow log when running under valgrind, so better to get this tested)
#
set log_slow_time=0.1;
-- echo TEST GROUP 1:

1
sql/sql_union.cc
View file

@ -645,6 +645,7 @@ bool st_select_lex_unit::exec()
if (!saved_error)
{
examined_rows+= thd->examined_row_count;
thd->examined_row_count= 0;
if (union_result->flush())
{
thd->lex->current_select= lex_select_save;