Commit 7b1f0820 authored by gkodinov/kgeorge@magare.gmz's avatar gkodinov/kgeorge@magare.gmz

Merge gkodinov@bk-internal.mysql.com:/home/bk/mysql-5.0-opt

into  magare.gmz:/home/kgeorge/mysql/autopush/B32268-5.0-opt
parents 410cc112 50d85111
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...@@ -2307,3 +2307,49 @@ a ...@@ -2307,3 +2307,49 @@ a
2 2
4 4
DROP TABLE t1; DROP TABLE t1;
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3);
INSERT INTO t1 SELECT a + 1, b FROM t1;
INSERT INTO t1 SELECT a + 2, b FROM t1;
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 ALL NULL NULL NULL NULL 12 Using temporary; Using filesort
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
a MIN(b) MAX(b)
4 1 3
3 1 3
2 1 3
1 1 3
CREATE INDEX break_it ON t1 (a, b);
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range NULL break_it 10 NULL 7 Using index for group-by
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
a MIN(b) MAX(b)
1 1 3
2 1 3
3 1 3
4 1 3
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 range NULL break_it 10 NULL 7 Using index for group-by; Using temporary; Using filesort
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
a MIN(b) MAX(b)
4 1 3
3 1 3
2 1 3
1 1 3
EXPLAIN
SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE t1 index NULL break_it 10 NULL 12 Using index
SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
a MIN(b) MAX(b) AVG(b)
4 1 3 2.0000
3 1 3 2.0000
2 1 3 2.0000
1 1 3 2.0000
DROP TABLE t1;
...@@ -888,7 +888,31 @@ SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1; ...@@ -888,7 +888,31 @@ SELECT SQL_BIG_RESULT DISTINCT(a) FROM t1;
DROP TABLE t1; DROP TABLE t1;
#
# Bug #32268: Indexed queries give bogus MIN and MAX results
#
CREATE TABLE t1 (a INT, b INT);
INSERT INTO t1 (a, b) VALUES (1,1), (1,2), (1,3);
INSERT INTO t1 SELECT a + 1, b FROM t1;
INSERT INTO t1 SELECT a + 2, b FROM t1;
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
CREATE INDEX break_it ON t1 (a, b);
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a;
EXPLAIN
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
SELECT a, MIN(b), MAX(b) FROM t1 GROUP BY a ORDER BY a DESC;
EXPLAIN
SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
SELECT a, MIN(b), MAX(b), AVG(b) FROM t1 GROUP BY a ORDER BY a DESC;
DROP TABLE t1;
...@@ -10261,7 +10261,8 @@ Next_select_func setup_end_select_func(JOIN *join) ...@@ -10261,7 +10261,8 @@ Next_select_func setup_end_select_func(JOIN *join)
/* Set up select_end */ /* Set up select_end */
if (table) if (table)
{ {
if (table->group && tmp_tbl->sum_func_count) if (table->group && tmp_tbl->sum_func_count &&
!tmp_tbl->precomputed_group_by)
{ {
if (table->s->keys) if (table->s->keys)
{ {
......
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