SYSTEM VIEW · 系统视图

pg_prepared_xacts

The view pg_prepared_xacts displays information about transactions that are currently prepared for two-phase commit (see PREPARE TRANSACTION for details). pg_prepared_xacts contains one row per prepared transaction. An entry is removed when the transaction is committed or rolled back.

首次收录 PG 9.0最近收录 PG 19当前字段 5

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 18.6 实例逐字段核对 · 原始实测记录 ↗

字段结构 PostgreSQL 18

pg_prepared_xacts

字段 / COLUMN	类型 / TYPE	说明 / DESCRIPTION
`transaction`	`xid`	Numeric transaction identifier of the prepared transaction
`gid`	`text`	Global transaction identifier that was assigned to the transaction
`prepared`	`timestamp with time zone`文档原写法：`timestamptz`	Time at which the transaction was prepared for commit
`owner`	`name`	Name of the user that executed the transaction引用：`pg_authid.rolname`
`database`	`name`	Name of the database in which the transaction was executed引用：`pg_database.datname`

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。

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	19
`transaction`
`gid`
`prepared`
`owner`
`database`

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

收录版本之间没有字段结构或描述变化。

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。