Commit d007600b authored by unknown's avatar unknown
Browse files

ps.test, ps.result: a test case for Bug#6042 "constants 

propogation works only once (prepared statements)".


mysql-test/r/ps.result:
  Test case for Bug#6042: test results fixed
mysql-test/t/ps.test:
  A test case for Bug#6042 "constants propogation works only once
  (prepared statements).
parent 4855ff51

mysql-test/r/ps.result

+18 −0
Original line number Diff line number Diff line
@@ -318,3 +318,21 @@ execute stmt; 
a

drop table t1;

deallocate prepare stmt;

create table t1 (a int, b int);

insert into t1 (a, b) values (1,1), (1,2), (2,1), (2,2);

prepare stmt from

"explain select * from t1 where t1.a=2 and t1.a=t1.b and t1.b > 1 + ?";

set @v=5;

execute stmt using @v;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

-	-	-	-	-	-	-	-	NULL	Impossible WHERE

set @v=0;

execute stmt using @v;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

-	-	-	-	-	-	-	-	4	Using where

set @v=5;

execute stmt using @v;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

-	-	-	-	-	-	-	-	NULL	Impossible WHERE

drop table t1;

deallocate prepare stmt;

mysql-test/t/ps.test

+21 −0
Original line number Diff line number Diff line
@@ -342,4 +342,25 @@ execute stmt; 
drop table t1;

deallocate prepare stmt;



#

# Test case for Bug#6042 "constants propogation works only once (prepared

# statements): check that the query plan changes whenever we change

# placeholder value.

#

create table t1 (a int, b int);

insert into t1 (a, b) values (1,1), (1,2), (2,1), (2,2);

prepare stmt from

"explain select * from t1 where t1.a=2 and t1.a=t1.b and t1.b > 1 + ?";

--replace_column 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 -

set @v=5;

execute stmt using @v;

--replace_column 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 -

set @v=0;

execute stmt using @v;

--replace_column 1 - 2 - 3 - 4 - 5 - 6 - 7 - 8 -

set @v=5;

execute stmt using @v;

drop table t1;

deallocate prepare stmt;