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Merge sanja.is.com.ua:/home/bell/mysql/bk/mysql-4.1

Browse source 
into sanja.is.com.ua:/home/bell/mysql/bk/work-union-4.1
This commit is contained in:
bell@sanja.is.com.ua 2003-09-18 10:50:53 +03:00
commit 0e1f26c2a4
5 changed files with 32 additions and 14 deletions
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5
mysql-test/r/subselect.result
View file

@ -1046,8 +1046,9 @@ t1 CREATE TABLE `t1` (
) TYPE=MyISAM CHARSET=latin1
drop table t1;
CREATE TABLE t1 SELECT (SELECT 1 as a UNION SELECT 1+1 limit 1,1) as a;
Warnings:
Warning 1262 Data truncated, NULL supplied to NOT NULL column 'a' at row 1
select * from t1;
a
2
SHOW CREATE TABLE t1;
Table Create Table
t1 CREATE TABLE `t1` (

4
mysql-test/r/union.result
View file

@ -409,7 +409,7 @@ found_rows()
SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2,2;
a
3
5
4
select found_rows();
found_rows()
6
@ -423,7 +423,7 @@ found_rows()
5
SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a desc LIMIT 1;
a
3
5
(SELECT * FROM t1 ORDER by a) UNION ALL (SELECT * FROM t2 ORDER BY a) ORDER BY A desc LIMIT 4;
a
5

1
mysql-test/t/subselect.test
View file

@ -606,6 +606,7 @@ CREATE TABLE t1 SELECT * FROM (SELECT 1 as a,(SELECT a+0)) a;
SHOW CREATE TABLE t1;
drop table t1;
CREATE TABLE t1 SELECT (SELECT 1 as a UNION SELECT 1+1 limit 1,1) as a;
select * from t1;
SHOW CREATE TABLE t1;
drop table t1;

4
sql/sql_parse.cc
View file

@ -1723,6 +1723,10 @@ mysql_execute_command(THD *thd)
break; // Error message is given
}
/*
In case of single SELECT unit->global_parameters points on first SELECT
TODO: move counters to SELECT_LEX
*/
unit->offset_limit_cnt= (ha_rows) unit->global_parameters->offset_limit;
unit->select_limit_cnt= (ha_rows) (unit->global_parameters->select_limit+
unit->global_parameters->offset_limit);

32
sql/sql_union.cc
View file

@ -262,8 +262,23 @@ int st_select_lex_unit::exec()
res= sl->join->reinit();
else
{
offset_limit_cnt= sl->offset_limit;
select_limit_cnt= sl->select_limit+sl->offset_limit;
if (sl != global_parameters)
{
offset_limit_cnt= sl->offset_limit;
select_limit_cnt= sl->select_limit+sl->offset_limit;
}
else
{
offset_limit_cnt= 0;
/*
We can't use LIMIT at this stage if we are using ORDER BY for the
whole query
*/
if (sl->order_list.first)
select_limit_cnt= HA_POS_ERROR;
else
select_limit_cnt= sl->select_limit+sl->offset_limit;
}
if (select_limit_cnt < sl->select_limit)
select_limit_cnt= HA_POS_ERROR; // no limit
@ -352,14 +367,11 @@ int st_select_lex_unit::exec()
{
ulong options= thd->options;
thd->lex.current_select= fake_select_lex;
if (select_cursor->braces)
{
offset_limit_cnt= global_parameters->offset_limit;
select_limit_cnt= global_parameters->select_limit +
global_parameters->offset_limit;
if (select_limit_cnt < global_parameters->select_limit)
select_limit_cnt= HA_POS_ERROR; // no limit
}
offset_limit_cnt= global_parameters->offset_limit;
select_limit_cnt= global_parameters->select_limit +
global_parameters->offset_limit;
if (select_limit_cnt < global_parameters->select_limit)
select_limit_cnt= HA_POS_ERROR; // no limit
if (select_limit_cnt == HA_POS_ERROR)
options&= ~OPTION_FOUND_ROWS;
else if (found_rows_for_union && !describe)