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#
# Test of prepared statements being rewritten.
#
CREATE TABLE t1 ( a INTEGER, b CHAR(1) );
INSERT INTO t1 VALUES ( 1, 'a' ), ( 2, 'b' ), ( 3, 'c' );
# Query rewrite plugin was installed.
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;
b
a
Warnings:
Note 1105 Query 'SELECT a FROM test.t1 WHERE a = 1' rewritten to 'SELECT b FROM test.t1 WHERE a = 1' by a query rewrite plugin
PREPARE stmt1 FROM 'SELECT a FROM test.t1 WHERE a = 1';
Warnings:
Note 1105 Query 'SELECT a FROM test.t1 WHERE a = 1' rewritten to 'SELECT b FROM test.t1 WHERE a = 1' by a query rewrite plugin
EXECUTE stmt1;
b
a
PREPARE stmt2 FROM 'SELECT a FROM test.t1 WHERE a = ?';
Warnings:
Note 1105 Query 'SELECT a FROM test.t1 WHERE a = ?' rewritten to 'SELECT b FROM test.t1 WHERE a = ?' by a query rewrite plugin
SET @var = 1;
EXECUTE stmt2 USING @var;
b
a
SET @var = 2;
EXECUTE stmt2 USING @var;
b
b
SET @var = 3;
EXECUTE stmt2 USING @var;
b
c
PREPARE stmt3 FROM 'SELECT 1, ?';
Warnings:
Note 1105 Query 'SELECT 1, ?' rewritten to 'SELECT "rewritten"' by a query rewrite plugin
SET @var= 1;
EXECUTE stmt3;
rewritten
rewritten
# Can't be rewritten. We rewrite at prepare time, when we don't know
# the value of the first '?'.
PREPARE stmt3 FROM 'SELECT ?, ?';
SET @var= 1;
EXECUTE stmt3 USING @var, @var;
? ?
1 1
DROP TABLE t1;
Warnings:
Warning 1620 Plugin is busy and will be uninstalled on shutdown
# Query rewrite plugin was queued for uninstalling.
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