51.45. pg_rewrite

51.45. `pg_rewrite`
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## 51.45. `pg_rewrite` #

The catalog `pg_rewrite` stores rewrite rules for tables and views.

Table 51.45. `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

### Note

`pg_class.relhasrules` must be true if a table has any rules in this catalog.

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