having to do with machinery: a mechanical failure. 2. being a machine; operated by machinery: a mechanical toy. 3. caused by or derived from machinery: mechanical propulsion.
ERROR: cannot alter type of a column used by a view or rule DETAIL: rule _RETURN on view v_change_me depends on column too_short. Though PostgreSQL tells us which view and column prompted this error, thatâs the last favor it provides.
Restrictions. User-defined table types have the following restrictions: A user-defined table type cannot be used as a column in a table or a field in a structured user-defined type. Alias types based on a user-defined table type. The [NOT FOR REPLICATION] option is not allowed.CHECK constraints require a computed column to be persisted.ser-defined table types have the following restrictions: A user-defined table type cannot be used as a column in a table or a field in a structured user-defined type.