pg_rewrite
The pg_rewrite system catalog table stores rewrite rules for tables and views. pg_class.relhasrules must be true if a table has any rules in this catalog.
| column | type | references | description |
|---|---|---|---|
| rulename | name | Rule name. | |
| ev_class | oid | pg_class.oid | The table this rule is for. |
| ev_type | char | Event type that the rule is for: 1 = SELECT, 2 = UPDATE, 3 = INSERT, 4 = DELETE | |
| ev_enabled | char | Controls in which session replication role mode the rule fires. Always O, rule fires in origin mode. | |
| is_instead | bool | True if the rule is an INSTEAD rule | |
| ev_qual | pg_node_tree | Expression tree (in the form of a nodeToString() representation) for the rule’s qualifying condition | |
| ev_action | pg_node_tree | Query tree (in the form of a nodeToString() representation) for the rule’s action |