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| author | unknown <gkodinov/kgeorge@macbook.gmz> | 2006-09-27 12:53:53 +0300 |
|---|---|---|
| committer | unknown <gkodinov/kgeorge@macbook.gmz> | 2006-09-27 12:53:53 +0300 |
| commit | ca5e29475c8ae52035214c710be04bcb1ed13177 (patch) | |
| tree | 6b273392cc6ed990e8b13d8e01148bd29035afd3 | |
| parent | c6af7ee164eb1487d0b54fcd3fe7753978f6a3a1 (diff) | |
| download | mariadb-git-ca5e29475c8ae52035214c710be04bcb1ed13177.tar.gz | |
Bug #21174: Index degrades sort performance and optimizer does not honor IGNORE INDEX
- reversed the patch for 5.0 and moved to 5.1
mysql-test/r/group_by.result:
Bug #21174: Index degrades sort performance and optimizer does not honor IGNORE INDEX
- reversed the patch for 5.0
mysql-test/t/group_by.test:
Bug #21174: Index degrades sort performance and optimizer does not honor IGNORE INDEX
- reversed the patch for 5.0
sql/sql_select.cc:
Bug #21174: Index degrades sort performance and optimizer does not honor IGNORE INDEX
- reversed the patch for 5.0
| -rw-r--r-- | mysql-test/r/group_by.result | 9 | ||||
| -rw-r--r-- | mysql-test/t/group_by.test | 12 | ||||
| -rw-r--r-- | sql/sql_select.cc | 2 |
3 files changed, 0 insertions, 23 deletions
diff --git a/mysql-test/r/group_by.result b/mysql-test/r/group_by.result index ef057e04d1a..5eb2e5744c1 100644 --- a/mysql-test/r/group_by.result +++ b/mysql-test/r/group_by.result @@ -821,12 +821,3 @@ a b real_b 68 France France DROP VIEW v1; DROP TABLE t1,t2; -CREATE TABLE t1 (a INT, b INT, KEY(a)); -INSERT INTO t1 VALUES (1, 1), (2, 2), (3,3), (4,4); -EXPLAIN SELECT a, SUM(b) FROM t1 GROUP BY a LIMIT 2; -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 index NULL a 5 NULL 4 -EXPLAIN SELECT a, SUM(b) FROM t1 IGNORE INDEX (a) GROUP BY a LIMIT 2; -id select_type table type possible_keys key key_len ref rows Extra -1 SIMPLE t1 ALL NULL NULL NULL NULL 4 Using temporary; Using filesort -DROP TABLE t1; diff --git a/mysql-test/t/group_by.test b/mysql-test/t/group_by.test index 8a514108dc3..ce1e4e59600 100644 --- a/mysql-test/t/group_by.test +++ b/mysql-test/t/group_by.test @@ -655,15 +655,3 @@ where t2.b=v1.a GROUP BY t2.b; DROP VIEW v1; DROP TABLE t1,t2; - -# -# Bug #21174: Index degrades sort performance and -# optimizer does not honor IGNORE INDEX -# -CREATE TABLE t1 (a INT, b INT, KEY(a)); -INSERT INTO t1 VALUES (1, 1), (2, 2), (3,3), (4,4); - -EXPLAIN SELECT a, SUM(b) FROM t1 GROUP BY a LIMIT 2; -EXPLAIN SELECT a, SUM(b) FROM t1 IGNORE INDEX (a) GROUP BY a LIMIT 2; - -DROP TABLE t1; diff --git a/sql/sql_select.cc b/sql/sql_select.cc index c38a9f4e637..d43f9fa214f 100644 --- a/sql/sql_select.cc +++ b/sql/sql_select.cc @@ -11735,8 +11735,6 @@ test_if_skip_sort_order(JOIN_TAB *tab,ORDER *order,ha_rows select_limit, We must not try to use disabled keys. */ usable_keys= table->s->keys_in_use; - /* we must not consider keys that are disabled by IGNORE INDEX */ - usable_keys.intersect(table->keys_in_use_for_query); for (ORDER *tmp_order=order; tmp_order ; tmp_order=tmp_order->next) { |