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fixing wrong value for "examined rows" when UNION's are used.

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Sinisa@sinisa.nasamreza.org 2005-01-18 23:13:29 +02:00
parent 0e56df7572
commit 477047401c
3 changed files with 27 additions and 4 deletions
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16
mysql-test/r/union.result
View File

@ -872,6 +872,22 @@ count(*)
show status like 'Slow_queries';
Variable_name Value
Slow_queries 3
flush status;
select a from t1 where b not in (1,2,3) union select a from t1 where b not in (4,5,6);
a
4
5
3
6
7
8
9
10
1
2
show status like 'Slow_queries';
Variable_name Value
Slow_queries 1
drop table t1;
create table t1 ( RID int(11) not null default '0', IID int(11) not null default '0', nada varchar(50) not null,NAME varchar(50) not null,PHONE varchar(50) not null) engine=MyISAM;
insert into t1 ( RID,IID,nada,NAME,PHONE) values (1, 1, 'main', 'a', '111'), (2, 1, 'main', 'b', '222'), (3, 1, 'main', 'c', '333'), (4, 1, 'main', 'd', '444'), (5, 1, 'main', 'e', '555'), (6, 2, 'main', 'c', '333'), (7, 2, 'main', 'd', '454'), (8, 2, 'main', 'e', '555'), (9, 2, 'main', 'f', '666'), (10, 2, 'main', 'g', '777');

4
mysql-test/t/union.test
View File

@ -481,6 +481,10 @@ select count(*) from t1 where b=13 union select count(*) from t1 where a=7;
show status like 'Slow_queries';
select count(*) from t1 where a=7 union select count(*) from t1 where b=13;
show status like 'Slow_queries';
# additional test for examined rows
flush status;
select a from t1 where b not in (1,2,3) union select a from t1 where b not in (4,5,6);
show status like 'Slow_queries';
drop table t1;
#

11
sql/sql_union.cc
View File

@ -466,11 +466,14 @@ int st_select_lex_unit::exec()
}
res= sl->join->error;
offset_limit_cnt= sl->offset_limit;
if (!res && union_result->flush())
if (!res)
{
examined_rows+= thd->examined_row_count;
thd->lex->current_select= lex_select_save;
DBUG_RETURN(1);
examined_rows+= thd->examined_row_count;
if (union_result->flush())
{
thd->lex->current_select= lex_select_save;
DBUG_RETURN(1);
}
}
}
if (res)