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