- Fixed bug #48764 (PDO_pgsql::query always uses implicit prepared statements if v3 proto available)

# original patch by Mark Kirkwood

ext/pdo_pgsql/pdo_pgsql.c

@@ -85,8 +85,8 @@ ZEND_GET_MODULE(pdo_pgsql)
  */
 PHP_MINIT_FUNCTION(pdo_pgsql)
 {
-	php_pdo_register_driver(&pdo_pgsql_driver);
 	REGISTER_PDO_CLASS_CONST_LONG("PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT", PDO_PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT);
+	php_pdo_register_driver(&pdo_pgsql_driver);
 	return SUCCESS;
 }
 /* }}} */

ext/pdo_pgsql/pgsql_driver.c

@@ -239,15 +239,13 @@ static int pgsql_handle_preparer(pdo_dbh_t *dbh, const char *sql, long sql_len,
 	}
 
 #if HAVE_PQPREPARE
-
 	else if (driver_options) {
-		if (pdo_attr_lval(driver_options,
-				PDO_PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT, 0 TSRMLS_CC) == 1) {
-			emulate = 1;
-		} else if (pdo_attr_lval(driver_options, PDO_ATTR_EMULATE_PREPARES,
-				0 TSRMLS_CC) == 1) {
+		if (pdo_attr_lval(driver_options, PDO_PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT, H->disable_native_prepares TSRMLS_CC) == 1 ||
+			pdo_attr_lval(driver_options, PDO_ATTR_EMULATE_PREPARES, H->emulate_prepares TSRMLS_CC) == 1) {
 			emulate = 1;
 		}
+	} else {
+		emulate = H->disable_native_prepares || H->emulate_prepares;
 	}
 
 	if (!emulate && PQprotocolVersion(H->server) > 2) {
@@ -625,7 +623,21 @@ static const zend_function_entry *pdo_pgsql_get_driver_methods(pdo_dbh_t *dbh, i
 
 static int pdo_pgsql_set_attr(pdo_dbh_t *dbh, long attr, zval *val TSRMLS_DC)
 {
-	return 0;
+	pdo_pgsql_db_handle *H = (pdo_pgsql_db_handle *)dbh->driver_data;
+
+	switch (attr) {
+#if HAVE_PQPREPARE
+		case PDO_ATTR_EMULATE_PREPARES:
+			H->emulate_prepares = Z_LVAL_P(val);
+			return 1;
+		case PDO_PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT:
+			H->disable_native_prepares = Z_LVAL_P(val);
+			return 1;
+#endif
+
+		default:
+			return 0;
+	}
 }
 
 static struct pdo_dbh_methods pgsql_methods = {

ext/pdo_pgsql/php_pdo_pgsql_int.h

@@ -43,6 +43,13 @@ typedef struct {
 	unsigned 	_reserved:31;
 	pdo_pgsql_error_info	einfo;
 	Oid 		pgoid;
+#if HAVE_PQPREPARE
+	/* The following two variables have the same purpose. Unfortunately we need
+	   to keep track of two different attributes having the same effect.
+	   It might be worth to deprecate the driver specific one soon. */
+	int		emulate_prepares;
+	int		disable_native_prepares;
+#endif
 } pdo_pgsql_db_handle;
 
 typedef struct {

ext/pdo_pgsql/tests/bug48764.phpt

@@ -0,0 +1,134 @@
+--TEST--
+Bug #48764 (PDO_pgsql::query always uses implicit prepared statements if v3 proto available)
+--SKIPIF--
+<?php
+if (!extension_loaded('pdo') || !extension_loaded('pdo_pgsql')) die('skip not loaded');
+require dirname(__FILE__) . '/config.inc';
+require dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
+PDOTest::skip();
+
+$db = PDOTest::factory();
+
+$client_version = $db->getAttribute(PDO::ATTR_CLIENT_VERSION);
+$server_version = $db->getAttribute(PDO::ATTR_SERVER_VERSION);
+
+if (version_compare($server_version, '7.4', '<') || version_compare($client_version, '7.4', '<')) {
+        die('skip');
+}
+
+?>
+--FILE--
+<?php
+require dirname(__FILE__) . '/../../../ext/pdo/tests/pdo_test.inc';
+$db = PDOTest::test_factory(dirname(__FILE__) . '/common.phpt');
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+echo "Test 1\n";
+bug($db);
+
+echo "Test 2\n";
+bug($db, array(PDO::ATTR_EMULATE_PREPARES => 0));
+bug($db, array(PDO::ATTR_EMULATE_PREPARES => 1));
+
+echo "Test 3\n";
+bug($db, array(PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT => 0));
+bug($db, array(PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT => 1));
+
+echo "Test 4\n";
+$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 1);
+bug($db);
+$db->setAttribute(PDO::ATTR_EMULATE_PREPARES, 0);
+bug($db);
+
+echo "Test 5\n";
+$db->setAttribute(PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT, 1);
+bug($db);
+$db->setAttribute(PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT, 0);
+bug($db);
+
+
+putenv('PDOTEST_ATTR='.serialize(array(
+	PDO::ATTR_EMULATE_PREPARES => 1,
+)));
+$db = PDOTest::factory('PDO', false);
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+echo "Test 6\n";
+bug($db);
+bug($db, array(PDO::ATTR_EMULATE_PREPARES => 0));
+bug($db, array(PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT => 0));
+
+
+putenv('PDOTEST_ATTR='.serialize(array(
+	PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT => 1,
+)));
+
+$db = PDOTest::factory('PDO', false);
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+echo "Test 7\n";
+bug($db);
+bug($db, array(PDO::ATTR_EMULATE_PREPARES => 0));
+bug($db, array(PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT => 0));
+
+
+putenv('PDOTEST_ATTR='.serialize(array(
+	PDO::ATTR_EMULATE_PREPARES => 1,
+	PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT => 1,
+)));
+
+$db = PDOTest::factory('PDO', false);
+$db->setAttribute(PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION);
+
+echo "Test 8\n";
+bug($db);
+bug($db, array(PDO::ATTR_EMULATE_PREPARES => 0));
+bug($db, array(PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT => 0));
+bug($db, array(
+	PDO::ATTR_EMULATE_PREPARES => 0,
+	PDO::PGSQL_ATTR_DISABLE_NATIVE_PREPARED_STATEMENT => 0,
+));
+
+
+putenv('PDOTEST_ATTR');
+
+
+function bug($db, $options = array()) {
+	try {
+		$stmt = $db->prepare("SELECT ?", $options);
+		$stmt->execute(array(1));
+		echo "OK\n";
+	} catch (PDOException $e) {
+		// Indetermined data type when using native prepared statements
+		echo $e->getCode()."\n";
+	}
+}
+
+--EXPECT--
+Test 1
+42P18
+Test 2
+42P18
+OK
+Test 3
+42P18
+OK
+Test 4
+OK
+42P18
+Test 5
+OK
+42P18
+Test 6
+OK
+42P18
+OK
+Test 7
+OK
+OK
+42P18
+Test 8
+OK
+OK
+OK
+42P18