51.44. pg_rewrite
The catalog pg_rewrite stores rewrite rules for tables and views.
Table 51.44. pg_rewrite Columns
| Name | Type | References | Description |
|---|---|---|---|
oid | oid | Row identifier | |
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 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 |
Note
pg_class.relhasrulesmust be true if a table has any rules in this catalog.
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https://www.postgresql.org/docs/12/catalog-pg-rewrite.html