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a fix.

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(Bug#3738: SQL_CALC_FOUND_ROWS ignores WHERE if LIMIT used,
 Bug#3845: wrong FOUND_ROWS result)
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unknown
2004-05-28 15:01:16 +05:00
parent a4237f3dd9
commit 0cb0e7f5b9
3 changed files with 40 additions and 2 deletions
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17
mysql-test/r/select_found.result
View File

@ -206,3 +206,20 @@ WHERE ( r = 1 AND a IN ( 1, 2 ) AND ( u = 'w' OR u LIKE 'w/%' ) )
OR ( r = 1 AND a IN ( 3 ) AND ( u = 'w/U' OR u LIKE 'w/U/%' ) )
OR ( r = 1 AND a IN ( 1, 2, 3 ) AND ( u = 'w' ) );
drop table t1;
CREATE TABLE t1 (a VARCHAR(16), UNIQUE(a));
INSERT INTO t1 VALUES ('1'), ('2'), ('3');
SELECT SQL_CALC_FOUND_ROWS * FROM t1 WHERE a = '2' LIMIT 0, 1;
a
2
SELECT FOUND_ROWS();
FOUND_ROWS()
1
DROP TABLE t1;
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (0), (0), (1), (2);
SELECT SQL_CALC_FOUND_ROWS * FROM t1 WHERE a = 0 GROUP BY a HAVING a > 10;
a
SELECT FOUND_ROWS();
FOUND_ROWS()
0
DROP TABLE t1;

19
mysql-test/t/select_found.test
View File

@ -127,3 +127,22 @@ WHERE ( r = 1 AND a IN ( 1, 2 ) AND ( u = 'w' OR u LIKE 'w/%' ) )
OR ( r = 1 AND a IN ( 1, 2, 3 ) AND ( u = 'w' ) );
drop table t1;
#
# Bug #3738: we have a ref key
#
CREATE TABLE t1 (a VARCHAR(16), UNIQUE(a));
INSERT INTO t1 VALUES ('1'), ('2'), ('3');
SELECT SQL_CALC_FOUND_ROWS * FROM t1 WHERE a = '2' LIMIT 0, 1;
SELECT FOUND_ROWS();
DROP TABLE t1;
#
# Bug #3845: group by, having and empty result
#
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (0), (0), (1), (2);
SELECT SQL_CALC_FOUND_ROWS * FROM t1 WHERE a = 0 GROUP BY a HAVING a > 10;
SELECT FOUND_ROWS();
DROP TABLE t1;

4
sql/sql_select.cc
View File

@ -5348,7 +5348,8 @@ end_send(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)),
if ((join->tables == 1) && !join->tmp_table && !join->sort_and_group
&& !join->send_group_parts && !join->having && !jt->select_cond &&
!(jt->select && jt->select->quick) &&
!(jt->table->file->table_flags() & HA_NOT_EXACT_COUNT))
!(jt->table->file->table_flags() & HA_NOT_EXACT_COUNT) &&
(jt->ref.key < 0))
{
/* Join over all rows in table; Return number of found rows */
TABLE *table=jt->table;
@ -5429,6 +5430,7 @@ end_send_group(JOIN *join, JOIN_TAB *join_tab __attribute__((unused)),
DBUG_RETURN(-1); /* purecov: inspected */
if (end_of_records)
{
if (!error)
join->send_records++;
DBUG_RETURN(0);
}