php-src/ext/pdo_mysql/tests/pdo_mysql_stmt_variable_columncount.phpt

--TEST--
MySQL Prepared Statements and different column counts
--SKIPIF--
<?php
require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'skipif.inc');
require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'mysql_pdo_test.inc');
MySQLPDOTest::skip();
$db = MySQLPDOTest::factory();

$row = $db->query('SELECT VERSION() as _version')->fetch(PDO::FETCH_ASSOC);
$matches = array();
if (!preg_match('/^(\d+)\.(\d+)\.(\d+)/ismU', $row['_version'], $matches))
	die(sprintf("skip Cannot determine MySQL Server version\n"));

$version = $matches[0] * 10000 + $matches[1] * 100 + $matches[2];
if ($version < 50000)
	die(sprintf("skip Need MySQL Server 5.0.0+, found %d.%02d.%02d (%d)\n",
		$matches[0], $matches[1], $matches[2], $version));
?>
--FILE--
<?php
	require_once(dirname(__FILE__) . DIRECTORY_SEPARATOR . 'mysql_pdo_test.inc');
	$db = MySQLPDOTest::factory();

	function check_result($offset, $stmt, $columns) {

		do {
				$row = $stmt->fetch(PDO::FETCH_ASSOC);
		} while ($stmt->nextRowSet());

		if (!isset($row['one']) || ($row['one'] != 1)) {
				printf("[%03d + 1] Expecting array('one' => 1), got %s\n", $offset, var_export($row, true));
				return false;
		}

		if (($columns == 2) &&
			(!isset($row['two']) || ($row['two'] != 2))) {
				printf("[%03d + 2] Expecting array('one' => 1, 'two' => 2), got %s\n", $offset, var_export($row, true));
				return false;
		} else if (($columns == 1) && isset($row['two'])) {
				printf("[%03d + 3] Expecting one array element got two\n", $offset);
				return false;
		}

		return true;
	}

	try {

		// What will happen if a PS returns a differen number of result set column upon each execution?
		// Lets try with a SP accepting parameters...
		$db->exec('DROP PROCEDURE IF EXISTS p');
		$db->exec('CREATE PROCEDURE p(IN cols INT) BEGIN IF cols < 2 THEN SELECT cols AS "one"; ELSE SELECT 1 AS "one", cols AS "two"; END IF; END;');

		// Emulates PS first
		$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 1);
		$stmt = $db->prepare('CALL p(?)');

		$columns = null;
		$stmt->bindParam(1, $columns);
		for ($i = 0; $i < 5; $i++) {
			$columns = ($i % 2) + 1;
			$stmt->execute();
			check_result($i, $stmt, $columns);
		}

		if (MySQLPDOTest::isPDOMySQLnd()) {
			// Native PS
			// Libmysql cannot handle such a stored procedure. You will see leaks with libmysql
			$db = MySQLPDOTest::factory();
			$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 0);
			$db->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, 1);
			$stmt = $db->prepare('CALL p(?)');
			$stmt->bindParam(1, $columns);
			for ($i = 5; $i < 10; $i++) {
				$columns = ($i % 2) + 1;
				$stmt->execute();
				check_result($i, $stmt, $columns);
			}
		}

		// And now without parameters... - this gives a different control flow inside PDO
		$db->exec('DROP PROCEDURE IF EXISTS p');
		$db->exec('CREATE PROCEDURE p() BEGIN DECLARE cols INT; SELECT @numcols INTO cols; IF cols < 2 THEN SET @numcols = 2; SELECT cols AS "one"; ELSE SET @numcols = 1; SELECT 1 AS "one", cols AS "two"; END IF; END;');

				// Emulates PS first
		$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 1);
		$db->exec('SET @numcols = 1');
		$stmt = $db->prepare('CALL p()');
		$stmt->execute();
		check_result(11, $stmt, 1);
		$stmt->execute();
		check_result(12, $stmt, 2);
		$db->exec('SET @numcols = 1');
		$stmt->execute();
		check_result(13, $stmt, 1);

		if (MySQLPDOTest::isPDOMySQLnd()) {
			// Native PS
			// Libmysql cannot handle such a stored procedure. You will see leaks with libmysql
			$db = MySQLPDOTest::factory();
			$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 0);
			$db->setAttribute(PDO::MYSQL_ATTR_USE_BUFFERED_QUERY, 1);
			$db->exec('SET @numcols = 1');
			$stmt = $db->prepare('CALL p()');
			$stmt->execute();
			check_result(14, $stmt, 1);
			$stmt->execute();
			check_result(15, $stmt, 2);
			$db->exec('SET @numcols = 1');
			$stmt->execute();
			check_result(16, $stmt, 1);
		}

	} catch (PDOException $e) {
		printf("[99] %s [%s] %s\n",
			$e->getMessage(), $db->errorCode(), implode(' ', $db->errorInfo()));
	}

	print "done!";
?>
--EXPECTF--
done!