Fix for BUG#13317: Make range optimizer able to produce ranges for "view.field IN (c1,c2)"

and "view.field BETWEEN c1 AND c2"


mysql-test/r/range.result:
  Testcase for BUG#13317
mysql-test/t/range.test:
  Testcase for BUG#13317

mysql-test/r/range.result

@@ -768,3 +768,22 @@ SELECT * FROM t1;
 a
 2
 DROP TABLE t1;
+create table t1 (a int, b int, primary key(a,b));
+create view v1 as select a, b from t1;
+INSERT INTO `t1` VALUES
+(0,0),(1,0),(2,0),(3,0),(4,0),(5,1),(6,1),(7,1),(8,1),(9,1),(10,2),(11,2),(12,2)
+,(13,2),(14,2),(15,3),(16,3),(17,3),(18,3),(19,3);
+explain select * from t1 where a in (3,4)  and b in (1,2,3);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	range	PRIMARY	PRIMARY	8	NULL	#	Using where; Using index
+explain select * from v1 where a in (3,4)  and b in (1,2,3);
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	range	PRIMARY	PRIMARY	8	NULL	#	Using where; Using index
+explain select * from t1 where a between 3 and 4 and b between 1 and 2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	SIMPLE	t1	range	PRIMARY	PRIMARY	8	NULL	#	Using where; Using index
+explain select * from v1 where a between 3 and 4 and b between 1 and 2;
+id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
+1	PRIMARY	t1	range	PRIMARY	PRIMARY	8	NULL	#	Using where; Using index
+drop view v1;
+drop table t1;

mysql-test/t/range.test

@@ -578,3 +578,25 @@ DELETE FROM t1 WHERE NOT(a <=> 2);
 SELECT * FROM t1;
 
 DROP TABLE t1;
+
+#
+# BUG#13317: range optimization doesn't work for IN over VIEW.
+#
+create table t1 (a int, b int, primary key(a,b));
+create view v1 as select a, b from t1;
+
+INSERT INTO `t1` VALUES
+(0,0),(1,0),(2,0),(3,0),(4,0),(5,1),(6,1),(7,1),(8,1),(9,1),(10,2),(11,2),(12,2)
+,(13,2),(14,2),(15,3),(16,3),(17,3),(18,3),(19,3);
+
+--replace_column 9 #
+explain select * from t1 where a in (3,4)  and b in (1,2,3);
+--replace_column 9 #
+explain select * from v1 where a in (3,4)  and b in (1,2,3);
+--replace_column 9 #
+explain select * from t1 where a between 3 and 4 and b between 1 and 2;
+--replace_column 9 #
+explain select * from v1 where a between 3 and 4 and b between 1 and 2;
+ 
+drop view v1;
+drop table t1;

sql/opt_range.cc

@@ -3533,17 +3533,17 @@ static SEL_TREE *get_mm_tree(PARAM *param,COND *cond)
 
   switch (cond_func->functype()) {
   case Item_func::BETWEEN:
-    if (cond_func->arguments()[0]->type() != Item::FIELD_ITEM)
+    if (cond_func->arguments()[0]->real_item()->type() != Item::FIELD_ITEM)
       DBUG_RETURN(0);
-    field_item= (Item_field*) (cond_func->arguments()[0]);
+    field_item= (Item_field*) (cond_func->arguments()[0]->real_item());
     value= NULL;
     break;
   case Item_func::IN_FUNC:
   {
     Item_func_in *func=(Item_func_in*) cond_func;
-    if (func->key_item()->type() != Item::FIELD_ITEM)
+    if (func->key_item()->real_item()->type() != Item::FIELD_ITEM)
       DBUG_RETURN(0);
-    field_item= (Item_field*) (func->key_item());
+    field_item= (Item_field*) (func->key_item()->real_item());
     value= NULL;
     break;
   }