pg_rewrite
The catalog pg_rewrite stores rewrite rules for tables and views.
pg_rewrite Columns
| Column Type | Description |
|---|---|
oid oid | Row identifier |
rulename name | Rule name |
ev_class oid (references 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” modes the rule fires. O = rule fires in “origin” and “local” modes, D = rule is disabled, R = rule fires in “replica” mode, A = rule fires always. |
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 |
pg_class.relhasrules must be true if a table has any rules in this catalog.