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Catalogs: pg_rewrite

The catalog pg_rewrite stores rewrite rules for tables and views.

Table 50-41. 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.

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doc_PostgreSQL
doc_PostgreSQL
2016-10-12 11:32:36
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