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The catalog pg_rewrite stores rewrite rules for tables and views.
Table 43-28. pg_rewrite Columns
| Name | Type | References | Description |
|---|---|---|---|
| rulename | name | Rule name | |
| 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) | |
| ev_type | char | Event type that the rule is for: 1 = SELECT, 2 = UPDATE, 3 = INSERT, 4 = DELETE | |
| 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.
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