| PostgreSQL 8.2.6 Documentation | ||||
|---|---|---|---|---|
| Prev | Fast Backward | Chapter 43. System Catalogs | Fast Forward | Next |
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.