Help Center/GaussDB/Developer Guide(Distributed_V2.0-2.x)/System Catalogs and System Views/System Catalogs/PG_REWRITE
Updated on 2025-08-19 GMT+08:00
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PG_REWRITE

PG_REWRITE records rewrite rules defined for tables and views.

Table 1 PG_REWRITE columns

Name

Type

Description

oid

oid

Row identifier (hidden attribute, which must be specified).

rulename

name

Name of a rule.

ev_class

oid

Name of the table that uses the rule.

ev_attr

smallint

Column to which this rule applies (always 0 to indicate the entire table).

ev_type

"char"

Event type for the rule.
  • 1: SELECT
  • 2: UPDATE
  • 3: INSERT
  • 4: DELETE

ev_enabled

"char"

Controls the mode in which the rule is triggered.
  • O: The rule is triggered in origin and local modes.
  • D: The rule is disabled.
  • R: The rule is triggered in replica mode.
  • A: The rule always fires.

is_instead

Boolean

The value is true if the rule is of the INSTEAD type. Otherwise, the value is false.

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

Parent topic:System Catalogs