1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
|
--echo #
--echo # Test of prepared statements being rewritten.
--echo #
--source suite/query_rewrite_plugins/include/have_plugin_rewriter.inc
CREATE TABLE t1 ( a INTEGER, b CHAR(1) );
INSERT INTO t1 VALUES ( 1, 'a' ), ( 2, 'b' ), ( 3, 'c' );
--source suite/query_rewrite_plugins/include/install_rewriter.inc
INSERT INTO query_rewrite.rewrite_rules ( pattern, replacement )
VALUES ( 'SELECT a FROM test.t1 WHERE a = ?',
'SELECT b FROM test.t1 WHERE a = ?' ),
( 'SELECT 1, ?', 'SELECT "rewritten"' );
CALL query_rewrite.flush_rewrite_rules();
SELECT a FROM test.t1 WHERE a = 1;
PREPARE stmt1 FROM 'SELECT a FROM test.t1 WHERE a = 1';
EXECUTE stmt1;
PREPARE stmt2 FROM 'SELECT a FROM test.t1 WHERE a = ?';
SET @var = 1;
EXECUTE stmt2 USING @var;
SET @var = 2;
EXECUTE stmt2 USING @var;
SET @var = 3;
EXECUTE stmt2 USING @var;
PREPARE stmt3 FROM 'SELECT 1, ?';
SET @var= 1;
EXECUTE stmt3;
--echo # Can't be rewritten. We rewrite at prepare time, when we don't know
--echo # the value of the first '?'.
PREPARE stmt3 FROM 'SELECT ?, ?';
SET @var= 1;
EXECUTE stmt3 USING @var, @var;
DROP TABLE t1;
--source suite/query_rewrite_plugins/include/uninstall_rewriter.inc
|
