From 715dc5f99ddf852a5ef45bcb68c6c86298f6a7c3 Mon Sep 17 00:00:00 2001 From: Igor Babaev Date: Fri, 30 Sep 2011 18:55:02 -0700 Subject: Fixed a cost estimation bug introduced into in the function best_access_path of the 5.3 code line after a merge with 5.2 on 2010-10-28 in order not to allow the cost to access a joined table to be equal to 0 ever. Expanded data sets for many test cases to get the same execution plans as before. --- mysql-test/r/subselect2.result | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) (limited to 'mysql-test/r/subselect2.result') diff --git a/mysql-test/r/subselect2.result b/mysql-test/r/subselect2.result index 67b9ef0a2e9..a7b6e40d9c9 100644 --- a/mysql-test/r/subselect2.result +++ b/mysql-test/r/subselect2.result @@ -125,14 +125,14 @@ DOCID DOCNAME DOCTYPEID FOLDERID AUTHOR CREATED TITLE SUBTITLE DOCABSTRACT PUBLI c373e9f5ad07993f3859444553544200 Last Discussion c373e9f5ad079174ff17444553544200 c373e9f5ad0796c0eca4444553544200 Goldilocks 2003-06-09 11:21:06 Title: Last Discussion NULL Setting new abstract and keeping doc checked out 2003-06-09 10:51:26 2003-06-09 10:51:26 NULL NULL NULL 03eea05112b845949f3fd03278b5fe43 2003-06-09 11:21:06 admin 0 NULL Discussion NULL NULL EXPLAIN SELECT t2.*, t4.DOCTYPENAME, t1.CONTENTSIZE,t1.MIMETYPE FROM t2 INNER JOIN t4 ON t2.DOCTYPEID = t4.DOCTYPEID LEFT OUTER JOIN t1 ON t2.DOCID = t1.DOCID WHERE t2.FOLDERID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID IN(SELECT t3.FOLDERID FROM t3 WHERE t3.PARENTID='2f6161e879db43c1a5b82c21ddc49089' AND t3.FOLDERNAME = 'Level1') AND t3.FOLDERNAME = 'Level2') AND t3.FOLDERNAME = 'Level3') AND t3.FOLDERNAME = 'CopiedFolder') AND t3.FOLDERNAME = 'Movie Reviews') AND t2.DOCNAME = 'Last Discussion'; id select_type table type possible_keys key key_len ref rows Extra -1 PRIMARY t3 ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX CMFLDRPARNT_IDX 35 const 6 Using index condition; Using where -1 PRIMARY t3 ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX CMFLDRPARNT_IDX 35 test.t3.FOLDERID 1 Using where -1 PRIMARY t3 ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX CMFLDRPARNT_IDX 35 test.t3.FOLDERID 1 Using where -1 PRIMARY t3 ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX CMFLDRPARNT_IDX 35 test.t3.FOLDERID 1 Using where -1 PRIMARY t3 ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX CMFLDRPARNT_IDX 35 test.t3.FOLDERID 1 Using where +1 PRIMARY t4 ALL PRIMARY NULL NULL NULL 10 1 PRIMARY t2 ALL DDOCTYPEID_IDX,DFOLDERID_IDX NULL NULL NULL 9 Using where; Using join buffer (flat, BNL join) 1 PRIMARY t1 eq_ref PRIMARY PRIMARY 34 test.t2.DOCID 1 -1 PRIMARY t4 eq_ref PRIMARY PRIMARY 34 test.t2.DOCTYPEID 1 +1 PRIMARY t3 eq_ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX PRIMARY 34 test.t2.FOLDERID 1 Using where +1 PRIMARY t3 eq_ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX PRIMARY 34 test.t3.PARENTID 1 Using where +1 PRIMARY t3 eq_ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX PRIMARY 34 test.t3.PARENTID 1 Using where +1 PRIMARY t3 eq_ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX PRIMARY 34 test.t3.PARENTID 1 Using where +1 PRIMARY t3 eq_ref PRIMARY,FFOLDERID_IDX,CMFLDRPARNT_IDX PRIMARY 34 test.t3.PARENTID 1 Using where drop table t1, t2, t3, t4; CREATE TABLE t1 (a int(10) , PRIMARY KEY (a)) Engine=InnoDB; INSERT INTO t1 VALUES (1),(2); -- cgit v1.2.1