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A fix (bug #6089: FOUND_ROWS returns wrong values when no table/view is used).

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This commit is contained in:
ram@gw.mysql.r18.ru
2004-10-27 14:51:17 +05:00
parent cce8f5449d
commit 07743423f7
5 changed files with 45 additions and 2 deletions
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2
mysql-test/r/ps.result
View File

@ -135,7 +135,7 @@ FOUND_ROWS()
1
execute stmt1;
FOUND_ROWS()
0
1
deallocate prepare stmt1;
drop table t1;
create table t1

25
mysql-test/r/select_found.result
View File

@ -246,3 +246,28 @@ SELECT FOUND_ROWS();
FOUND_ROWS()
0
DROP TABLE t1;
SELECT 'foo';
foo
foo
SELECT FOUND_ROWS();
FOUND_ROWS()
1
SELECT SQL_CALC_FOUND_ROWS 'foo';
foo
foo
SELECT FOUND_ROWS();
FOUND_ROWS()
1
SELECT SQL_CALC_FOUND_ROWS 'foo' limit 0;
foo
SELECT FOUND_ROWS();
FOUND_ROWS()
1
SELECT FOUND_ROWS();
FOUND_ROWS()
1
SELECT SQL_CALC_FOUND_ROWS 'foo' UNION SELECT 'bar' LIMIT 0;
foo
SELECT FOUND_ROWS();
FOUND_ROWS()
2

15
mysql-test/t/select_found.test
View File

@ -166,3 +166,18 @@ 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;
#
# Bug #6089: queries which don't use any tables
#
SELECT 'foo';
SELECT FOUND_ROWS();
SELECT SQL_CALC_FOUND_ROWS 'foo';
SELECT FOUND_ROWS();
SELECT SQL_CALC_FOUND_ROWS 'foo' limit 0;
SELECT FOUND_ROWS();
SELECT FOUND_ROWS();
SELECT SQL_CALC_FOUND_ROWS 'foo' UNION SELECT 'bar' LIMIT 0;
SELECT FOUND_ROWS();

1
sql/sql_class.cc
View File

@ -177,6 +177,7 @@ THD::THD()
lock=locked_tables=0;
used_tables=0;
cuted_fields= sent_row_count= 0L;
limit_found_rows= 0;
statement_id_counter= 0UL;
// Must be reset to handle error with THD's created for init of mysqld
lex->current_select= 0;

4
sql/sql_select.cc
View File

@ -1067,7 +1067,9 @@ JOIN::exec()
else
error=(int) result->send_eof();
}
thd->limit_found_rows= thd->examined_row_count= 0;
/* Single select (without union and limit) always returns 1 row */
thd->limit_found_rows= 1;
thd->examined_row_count= 0;
DBUG_VOID_RETURN;
}
thd->limit_found_rows= thd->examined_row_count= 0;