Полезная информация

3.18. pg_rewrite

This system catalog stores rewrite rules for tables and views.

Table 3-18. pg_rewrite Columns

NameTypeReferencesDescription
rulenamename Rule name
ev_typechar Event type that the rule is for: '1' = SELECT, '2' = UPDATE, '3' = INSERT, '4' = DELETE
ev_classoidpg_class.oidThe table this rule is for
ev_attrint2 The column this rule is for (currently, always zero to indicate the whole table)
is_insteadbool True if the rule is an INSTEAD rule
ev_qualtext Expression tree (in the form of a nodeToString representation) for the rule's qualifying condition
ev_actiontext 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.