SYSTEM CATALOG · 系统目录

pg_propgraph_property

The catalog pg_propgraph_property stores information about the properties in a property graph. This only stores information that applies to a property throughout the graph, independent of what label or element it is on. Additional information, including the actual expressions that define the properties are in the catalog pg_propgraph_label_property.

首次收录 PG 19最近收录 PG 19当前字段 6

9.0 9.1 9.2 9.3 9.4 9.5 9.6 10 11 12 13 14 15 16 17 18 19^β3

已与 PostgreSQL 19beta3 实例逐字段核对 · 原始实测记录 ↗

字段结构 PostgreSQL 19

pg_propgraph_property

字段 / COLUMN	类型 / TYPE	说明 / DESCRIPTION
`oid`	`oid`NOT NULL	Row identifier
`pgppgid`	`oid`NOT NULL	Reference to the property graph that this property belongs to引用：`pg_class.oid`
`pgpname`	`name`NOT NULL	The name of the property. This is unique among the properties in a graph.
`pgptypid`	`oid`NOT NULL	The data type of this property. (This is required to be fixed for a given property in a property graph, even if the property is defined multiple times in different elements and labels.)引用：`pg_type.oid`
`pgptypmod`	`integer`NOT NULL文档原写法：`int4`	typmod to be applied to the data type of this property. (This is required to be fixed for a given property in a property graph, even if the property is defined multiple times in different elements and labels.)
`pgpcollation`	`oid`NOT NULL	The defined collation of this property, or zero if the property is not of a collatable data type. (This is required to be fixed for a given property in a property graph, even if the property is defined multiple times in different elements and labels.)引用：`pg_collation.oid`

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。

字段	类型	attnum
`tableoid`	`oid`	-6
`cmax`	`cid`	-5
`xmax`	`xid`	-4
`cmin`	`cid`	-3
`xmin`	`xid`	-2
`ctid`	`tid`	-1

字段演化矩阵

悬停查看字段类型

存在新增 / 类型或属性变化移除

字段 / COLUMN	9.0	9.1	9.2	9.3	9.4	9.5	9.6	10	11	12	13	14	15	16	17	18
`oid`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgppgid`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgpname`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgptypid`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgptypmod`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–
`pgpcollation`	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–	–

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。

演化时间线

相邻大版本的变化

PostgreSQL 19 ← 18新增目录

+ oid+ pgppgid+ pgpname+ pgptypid+ pgptypmod+ pgpcollation

比较任意两个版本

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。