Fix for BUG#9348: when computing union of two intervals set lower bound to

minimum of lower bounds of two joined intervals.

mysql-test/r/range.result

@@ -577,3 +577,22 @@ id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 explain select * from t1 where a='aaa' collate latin1_german1_ci;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	SIMPLE	t1	ALL	a	NULL	NULL	NULL	9	Using where
+drop table t1;
+CREATE TABLE t1 (
+`CLIENT` char(3) character set latin1 collate latin1_bin NOT NULL default '000',
+`ARG1` char(3) character set latin1 collate latin1_bin NOT NULL default '',
+`ARG2` char(3) character set latin1 collate latin1_bin NOT NULL default '',
+`FUNCTION` varchar(10) character set latin1 collate latin1_bin NOT NULL default '',
+`FUNCTINT` int(11) NOT NULL default '0',
+KEY `VERI_CLNT~2` (`ARG1`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+INSERT INTO t1 VALUES ('000',' 0',' 0','Text 001',0), ('000',' 0',' 1','Text 002',0),
+('000',' 1',' 2','Text 003',0), ('000',' 2',' 3','Text 004',0),
+('001',' 3',' 0','Text 017',0);
+SELECT count(*) FROM t1 WHERE CLIENT='000' AND (ARG1 != ' 1' OR ARG1 != ' 2');
+count(*)
+4
+SELECT count(*) FROM t1 WHERE CLIENT='000' AND (ARG1 != ' 2' OR ARG1 != ' 1');
+count(*)
+4
+drop table t1;

mysql-test/t/range.test

@@ -445,3 +445,24 @@ explain select * from t1 where a=binary 'aaa';
 explain select * from t1 where a='aaa' collate latin1_bin;
 # this one cannot:
 explain select * from t1 where a='aaa' collate latin1_german1_ci;
+drop table t1;
+
+# Test for BUG#9348 "result for WHERE A AND (B OR C) differs from WHERE a AND (C OR B)"
+CREATE TABLE t1 (
+  `CLIENT` char(3) character set latin1 collate latin1_bin NOT NULL default '000',
+  `ARG1` char(3) character set latin1 collate latin1_bin NOT NULL default '',
+  `ARG2` char(3) character set latin1 collate latin1_bin NOT NULL default '',
+  `FUNCTION` varchar(10) character set latin1 collate latin1_bin NOT NULL default '',
+  `FUNCTINT` int(11) NOT NULL default '0',
+  KEY `VERI_CLNT~2` (`ARG1`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
+INSERT INTO t1 VALUES ('000',' 0',' 0','Text 001',0), ('000',' 0',' 1','Text 002',0),
+  ('000',' 1',' 2','Text 003',0), ('000',' 2',' 3','Text 004',0),
+  ('001',' 3',' 0','Text 017',0);
+
+SELECT count(*) FROM t1 WHERE CLIENT='000' AND (ARG1 != ' 1' OR ARG1 != ' 2');
+
+SELECT count(*) FROM t1 WHERE CLIENT='000' AND (ARG1 != ' 2' OR ARG1 != ' 1');
+drop table t1;
+

sql/opt_range.cc

@@ -1683,6 +1683,7 @@ key_or(SEL_ARG *key1,SEL_ARG *key2)
 	  last=last->next;
 	  key1=key1->tree_delete(save);
 	}
+        last->copy_min(tmp);
 	if (last->copy_min(key2) || last->copy_max(key2))
 	{					// Full range
 	  key1->free_tree();