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Fixed a crash with pbxt.subselect when 'derived_merge' is set off in

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the optimizer switch.
This commit is contained in:
Igor Babaev 2011-07-22 21:39:55 -07:00
parent 2092436457
commit d117f51901
3 changed files with 1 additions and 9 deletions
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3
mysql-test/suite/pbxt/r/subselect.result
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@ -2627,8 +2627,6 @@ createDate datetime NOT NULL,
modifyDate timestamp NOT NULL
);
INSERT INTO t5 VALUES (5141,12,'2004-08-06','2004-08-06');
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=on';
select
count(distinct t2.userid) pass,
groupstuff.*,
@ -2670,7 +2668,6 @@ pass userid parentid parentgroup childid groupname grouptypeid crse categoryid c
1 5141 12 group2 12 group2 5 1 1 87 Oct04
1 5141 12 group2 12 group2 5 1 2 88 Oct04
1 5141 12 group2 12 group2 5 1 2 89 Oct04
set optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3, t4, t5;
create table t1 (a int);
insert into t1 values (1), (2), (3);

5
mysql-test/suite/pbxt/t/subselect.test
View File

@ -1674,9 +1674,6 @@ CREATE TABLE t5 (
);
INSERT INTO t5 VALUES (5141,12,'2004-08-06','2004-08-06');
set @save_optimizer_switch=@@optimizer_switch;
set optimizer_switch='derived_merge=on';
select
count(distinct t2.userid) pass,
groupstuff.*,
@ -1709,8 +1706,6 @@ join
group by
groupstuff.groupname, colhead , t2.courseid;
set optimizer_switch=@save_optimizer_switch;
drop table t1, t2, t3, t4, t5;
#

2
sql/sql_select.cc
View File

@ -5365,7 +5365,7 @@ best_access_path(JOIN *join,
/* Estimate the cost of the hash join access to the table */
ha_rows rnd_records= matching_candidates_in_table(s, found_constraint);
tmp= s->quick ? s->quick->read_time : s->table->file->scan_time();
tmp= s->quick ? s->quick->read_time : s->scan_time();
tmp+= (s->records - rnd_records)/(double) TIME_FOR_COMPARE;
/* We read the table as many times as join buffer becomes full. */