SYSTEM CATALOG · 系统目录

pg_rewrite

The catalog pg_rewrite stores rewrite rules for tables and views.

首次收录 PG 9.0最近收录 PG 19当前字段 8

已与 PostgreSQL 18.6 实例逐字段核对 · 原始实测记录 ↗

字段结构 PostgreSQL 18

pg_rewrite

字段 / COLUMN	类型 / TYPE	说明 / DESCRIPTION
`oid`	`oid`NOT NULL	Row identifier
`rulename`	`name`NOT NULL	Rule name
`ev_class`	`oid`NOT NULL	The table this rule is for引用：`pg_class.oid`
`ev_type`	`"char"`NOT NULL文档原写法：`char`	Event type that the rule is for: 1 = SELECT, 2 = UPDATE, 3 = INSERT, 4 = DELETE
`ev_enabled`	`"char"`NOT NULL文档原写法：`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`	`boolean`NOT NULL文档原写法：`bool`	True if the rule is an INSTEAD rule
`ev_qual`	`pg_node_tree`NOT NULL	Expression tree (in the form of a nodeToString() representation) for the rule's qualifying condition
`ev_action`	`pg_node_tree`NOT NULL	Query tree (in the form of a nodeToString() representation) for the rule's action

标记“隐式列”的字段不包含在 SELECT * 中；部分早期统计视图由同版本源码补全，额外来源会显示在字段说明中。

通用系统列 6

PostgreSQL 提供的系统属性，通常不在 SELECT * 中展开。单独保留，不与普通字段混算。

悬停查看字段类型

存在新增 / 类型或属性变化移除

9.0 是收录基线；基线中已存在的字段不标记为新增。矩阵按字段名称对齐，重命名显示为旧字段移除与新字段新增。

相邻大版本的变化

PostgreSQL 12 ← 11

~ ev_action: not_null: false → true~ ev_qual: not_null: false → true~ oid: 隐式列 → 常规列1 处字段说明更新

PostgreSQL 10 ← 9.6

1 处字段说明更新

PostgreSQL 9.4 ← 9.3

− ev_attr

PostgreSQL 9.3 ← 9.2

1 处字段说明更新

PostgreSQL 9.1 ← 9.0

~ ev_action: text → pg_node_tree~ ev_qual: text → pg_node_tree

起始版本 / FROM目标版本 / TO包含描述更新

选择两个版本，查看字段的新增、移除与类型变化。交互比较需要 JavaScript；演化时间线可直接阅读。