pg_rewrite stores rewrite rules for tables and views.
Row identifier (hidden attribute; must be explicitly selected)
The table this rule is for
Event type that the rule is for: 1 =
Controls in which session_replication_role modes the rule fires.
True if the rule is an
Expression tree (in the form of a
Query tree (in the form of a
pg_class.relhasrules must be true if a table has any rules in this catalog.