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Reproduce unexpected MySQL warnings for binary values

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The prepared statement emulation layer is handling binary content in a
way that creates warnings in MySQL.

When analysing the query logs, we saw that the content sent to the
server is missing `0x5C` characters when the using emulated prepares.

This introduces a minimal test case that reproduces the issue to aid the
solution.

More info: https://github.com/doctrine/dbal/pull/6522#issuecomment-2340939347

Signed-off-by: Luís Cobucci <lcobucci@gmail.com>
This commit is contained in:
Luís Cobucci 2024-09-18 20:14:33 +02:00 • committed by Matteo Beccati
parent 5c7c5d93ae
commit 93c68caeb5
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ext/pdo_mysql/tests/pdo_mysql_prepare_emulated_binary.phpt Normal file
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--TEST--
MySQL PDO->prepare(), no warnings should be raised for binary values using emulated PS
--EXTENSIONS--
pdo_mysql
--SKIPIF--
<?php
require_once __DIR__ . '/inc/mysql_pdo_test.inc';
MySQLPDOTest::skip();
?>
--FILE--
<?php
require_once __DIR__ . '/inc/mysql_pdo_test.inc';
$db = MySQLPDOTest::factory();
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, true);
$content = '0191D886E6DC73E7AF1FEE7F99EC6235';
$statement = $db->prepare('SELECT HEX(?) as test');
$statement->bindValue(1, hex2bin($content), PDO::PARAM_LOB);
$statement->execute();
var_dump($statement->fetchAll(PDO::FETCH_ASSOC)[0]['test'] === $content);
var_dump($db->query('SHOW WARNINGS')->fetchAll(PDO::FETCH_ASSOC));
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, false);
$statement2 = $db->prepare('SELECT HEX(?) as test');
$statement2->bindValue(1, hex2bin($content), PDO::PARAM_LOB);
$statement2->execute();
var_dump($statement2->fetchAll(PDO::FETCH_ASSOC)[0]['test'] === $content);
$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, true); // SHOW WARNINGS can only be used when PDO::ATTR_EMULATE_PREPARES=true
var_dump($db->query('SHOW WARNINGS')->fetchAll(PDO::FETCH_ASSOC));
print "done!";
?>
--EXPECTF--
bool(true)
array(0) {
}
bool(true)
array(0) {
}
done!