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fix of yet another join_free bug

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decreased number of check of "!join->select_lex->dependent"
This commit is contained in:
bell@sanja.is.com.ua
2002-11-11 00:15:38 +02:00
parent 1582aafcb0
commit 46a74ce73b
3 changed files with 78 additions and 17 deletions
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21
mysql-test/r/subselect.result
View File

@ -220,3 +220,24 @@ id select_type table type possible_keys key key_len ref rows Extra
2 SUBSELECT No tables used
3 UNION No tables used
drop table searchconthardwarefr3;
drop table if exists forumconthardwarefr7, searchconthardwarefr7;
CREATE TABLE `forumconthardwarefr7` (
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
) TYPE=MyISAM ROW_FORMAT=FIXED;
INSERT INTO forumconthardwarefr7 (numeropost,maxnumrep) VALUES (40143,1),(43506,2);
CREATE TABLE `searchconthardwarefr7` (
`mot` varchar(30) NOT NULL default '',
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) NOT NULL default '',
PRIMARY KEY (`mot`,`pseudo`,`date`,`topic`)
) TYPE=MyISAM ROW_FORMAT=DYNAMIC;
INSERT INTO searchconthardwarefr7 (mot,topic,date,pseudo) VALUES ('joce','40143','2002-10-22','joce'), ('joce','43506','2002-10-22','joce');
SELECT numeropost,maxnumrep FROM forumconthardwarefr7 WHERE exists (SELECT 1 FROM searchconthardwarefr7 WHERE (mot='joce') AND date >= '2002-10-21' AND forumconthardwarefr7.numeropost = searchconthardwarefr7.topic) ORDER BY maxnumrep DESC LIMIT 0, 20;
numeropost maxnumrep
43506 2
40143 1
drop table forumconthardwarefr7, searchconthardwarefr7;

24
mysql-test/t/subselect.test
View File

@ -115,3 +115,27 @@ SELECT 1 FROM searchconthardwarefr3 WHERE 1=(SELECT 1 UNION SELECT 1) UNION ALL
SELECT 1 FROM searchconthardwarefr3 WHERE 1=(SELECT 1 UNION ALL SELECT 1) UNION SELECT 1;
EXPLAIN SELECT 1 FROM searchconthardwarefr3 WHERE 1=(SELECT 1 UNION SELECT 1);
drop table searchconthardwarefr3;
drop table if exists forumconthardwarefr7, searchconthardwarefr7;
CREATE TABLE `forumconthardwarefr7` (
`numeropost` mediumint(8) unsigned NOT NULL auto_increment,
`maxnumrep` int(10) unsigned NOT NULL default '0',
PRIMARY KEY (`numeropost`),
UNIQUE KEY `maxnumrep` (`maxnumrep`)
) TYPE=MyISAM ROW_FORMAT=FIXED;
INSERT INTO forumconthardwarefr7 (numeropost,maxnumrep) VALUES (40143,1),(43506,2);
CREATE TABLE `searchconthardwarefr7` (
`mot` varchar(30) NOT NULL default '',
`topic` mediumint(8) unsigned NOT NULL default '0',
`date` date NOT NULL default '0000-00-00',
`pseudo` varchar(35) NOT NULL default '',
PRIMARY KEY (`mot`,`pseudo`,`date`,`topic`)
) TYPE=MyISAM ROW_FORMAT=DYNAMIC;
INSERT INTO searchconthardwarefr7 (mot,topic,date,pseudo) VALUES ('joce','40143','2002-10-22','joce'), ('joce','43506','2002-10-22','joce');
SELECT numeropost,maxnumrep FROM forumconthardwarefr7 WHERE exists (SELECT 1 FROM searchconthardwarefr7 WHERE (mot='joce') AND date >= '2002-10-21' AND forumconthardwarefr7.numeropost = searchconthardwarefr7.topic) ORDER BY maxnumrep DESC LIMIT 0, 20;
drop table forumconthardwarefr7, searchconthardwarefr7;

20
sql/sql_select.cc
View File

@ -2911,6 +2911,23 @@ join_free(JOIN *join)
*/
if (join->tables > join->const_tables) // Test for not-const tables
free_io_cache(join->table[join->const_tables]);
if (join->select_lex->dependent)
for (tab=join->join_tab,end=tab+join->tables ; tab != end ; tab++)
{
if (tab->table)
{
if (tab->table->key_read)
{
tab->table->key_read= 0;
tab->table->file->extra(HA_EXTRA_NO_KEYREAD);
}
/* Don't free index if we are using read_record */
if (!tab->read_record.table)
tab->table->file->index_end();
}
}
else
{
for (tab=join->join_tab,end=tab+join->tables ; tab != end ; tab++)
{
delete tab->select;
@ -2929,10 +2946,9 @@ join_free(JOIN *join)
}
end_read_record(&tab->read_record);
}
//TODO: is enough join_free at the end of mysql_select?
if (!join->select_lex->dependent)
join->table= 0;
}
}
/*
We are not using tables anymore
Unlock all tables. We may be in an INSERT .... SELECT statement.