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SYSTEM CATALOG · 系统目录

pg_partitioned_table

PostgreSQL 官方文档 ↗源码定义 ↗

The catalog pg_partitioned_table stores information about how tables are partitioned.

首次收录 PG 10最近收录 PG 19当前字段 8
9.09.19.29.39.49.59.610111213141516171819β3

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_partitioned_table
字段 / COLUMN类型 / TYPE说明 / DESCRIPTION
partrelid oidNOT NULL The OID of the pg_class entry for this partitioned table引用：pg_class.oid
partstrat "char"NOT NULL文档原写法：char Partitioning strategy; h = hash partitioned table, l = list partitioned table, r = range partitioned table
partnatts smallintNOT NULL文档原写法：int2 The number of columns in the partition key
partdefid oidNOT NULL The OID of the pg_class entry for the default partition of this partitioned table, or zero if this partitioned table does not have a default partition引用：pg_class.oid
partattrs int2vectorNOT NULL This is an array of partnatts values that indicate which table columns are part of the partition key. For example, a value of 1 3 would mean that the first and the third table columns make up the partition key. A zero in this array indicates that the corresponding partition key column is an expression, rather than a simple column reference.引用：pg_attribute.attnum
partclass oidvectorNOT NULL For each column in the partition key, this contains the OID of the operator class to use. See pg_opclass for details.引用：pg_opclass.oid
partcollation oidvectorNOT NULL For each column in the partition key, this contains the OID of the collation to use for partitioning, or zero if the column is not of a collatable data type.引用：pg_collation.oid
partexprs pg_node_tree Expression trees (in nodeToString() representation) for partition key columns that are not simple column references. This is a list with one element for each zero entry in partattrs. Null if all partition key columns are simple references.

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
tableoidoid-6
cmaxcid-5
xmaxxid-4
cmincid-3
xminxid-2
ctidtid-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 / COLUMN9.09.19.29.39.49.59.610111213141516171819
partrelid – – – – – – –
partstrat – – – – – – –
partnatts – – – – – – –
partattrs – – – – – – –
partclass – – – – – – –
partcollation – – – – – – –
partexprs – – – – – – –
partdefid – – – – – – – –

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 14 ← 13

2 处字段说明更新

PostgreSQL 11 ← 10

+ partdefid1 处字段说明更新

PostgreSQL 10 ← 9.6新增目录

+ partrelid+ partstrat+ partnatts+ partattrs+ partclass+ partcollation+ partexprs

比较任意两个版本

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。