[DDC-2110] fixed problem with existing table columns (postgresql)

lib/Doctrine/DBAL/Platforms/PostgreSqlPlatform.php

@@ -254,7 +254,7 @@ class PostgreSqlPlatform extends AbstractPlatform
             list($schema, $table) = explode(".", $table);
             $schema = "'" . $schema . "'";
         } else {
-            $schema = "ANY(string_to_array((select setting from pg_catalog.pg_settings where name = 'search_path'),','))";
+            $schema = "ANY(string_to_array((select replace(setting,'\"\$user\"',(SELECT user)) from pg_catalog.pg_settings where name = 'search_path'),','))";
         }
         $whereClause .= "$classAlias.relname = '" . $table . "' AND $namespaceAlias.nspname = $schema";