detect syntax error in conditional union (#128)

Co-authored-by: Markus Staab <[email protected]>

Author: staabm

.phpstan-dba.cache

@@ -65,6 +65,10 @@ public function testSyntaxErrorInQueryRule(): void
                 "Query error: Unknown column 'asdsa' in 'where clause' (1054).",
                 103,
             ],
+            [
+                "Query error: Unknown column 'xy' in 'group statement' (1054).",
+                118,
+            ],
         ]);
     }
 }

.phpunit-phpstan-dba.cache

@@ -107,4 +107,14 @@ public function validPrepare(PDO $pdo)
     {
         $pdo->prepare('SELECT email, adaid, gesperrt, freigabe1u1 FROM ada WHERE adaid=?');
     }
+
+    public function conditionalSyntaxErrorInQueryUnion(PDO $pdo)
+    {
+        $add = "WHERE email='my_other_table'";
+        if (rand(0, 1)) {
+            $add = 'GROUP BY xy';
+        }
+
+        $pdo->query('SELECT email, adaid FROM ada '.$add.' LIMIT 1', PDO::FETCH_ASSOC);
+    }
 }