John Burski <John(dot)Burski(at)911ep(dot)com> writes:
> clocker=# DELETE FROM employee_tbl WHERE emp_id = '1119';
> ERROR: Unable to identify an operator '=' for types 'varchar' and 'bpchar'
> You will have to retype this query using an explicit cast
I'll bet you have a foreign-key constraint referencing this table,
and the other column is varchar not char. 7.1 detects unexecutable
FK constraints when you try to create one, but 7.0 didn't, IIRC.
regards, tom lane