51.44. pg_rewrite

The catalog pg_rewrite stores rewrite rules for tables and views.

Table 51.44. pg_rewrite Columns

Name

Type

References

Description

oid

oid

Row identifier (hidden attribute; must be explicitly selected)

rulename

name

Rule name

ev_class

oid

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.