This system catalog stores rewrite rules for tables and views.
Table 3-17. pg_rewrite Columns
| Name | Type | References | Description |
|---|---|---|---|
| rulename | name | Rule name | |
| ev_type | char | Event type that the rule is for: '1' = SELECT, '2' = UPDATE, '3' = INSERT, '4' = DELETE | |
| ev_class | oid | pg_class.oid | The table this rule is for |
| ev_attr | int2 | The column this rule is for (currently, always zero to indicate the whole table) | |
| is_instead | bool | True if the rule is an INSTEAD rule | |
| ev_qual | text | Expression tree (in the form of a nodeToString representation) for the rule's qualifying condition | |
| ev_action | text | 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.