Begin Prepare (logical replication)
Logical replication Begin Prepare format. Identifies the message as the beginning of a prepared transaction message.
当前阅读 PG 18·选择有来源记录的版本
此版本暂无所选语言的定义，以下显示原始英文内容。
- Layer
- Logical replication payload; distinct from the frontend/backend message envelope
- First field
- Byte1('b')
- manual path
- /docs/18/protocol-logicalrep-message-formats.html
- signature
- Begin Prepare
版本定义 PG 18
-
- Byte1('b')
-
Identifies the message as the beginning of a prepared transaction message.
- Int64 (XLogRecPtr)
-
The LSN of the prepare.
- Int64 (XLogRecPtr)
-
The end LSN of the prepared transaction.
- Int64 (TimestampTz)
-
Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01).
- Int32 (TransactionId)
-
Xid of the transaction.
- String
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The user defined GID of the prepared transaction.
Fields in documented order
| Position | Format | Meaning |
|---|---|---|
| 1 | Byte1('b') | Identifies the message as the beginning of a prepared transaction message. |
| 2 | Int64 (XLogRecPtr) | The LSN of the prepare. |
| 3 | Int64 (XLogRecPtr) | The end LSN of the prepared transaction. |
| 4 | Int64 (TimestampTz) | Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01). |
| 5 | Int32 (TransactionId) | Xid of the transaction. |
| 6 | String | The user defined GID of the prepared transaction. |
比较版本
完整来源事实
fields
map[description:Identifies the message as the beginning of a prepared transaction message. format:Byte1('b')], map[description:The LSN of the prepare. format:Int64 (XLogRecPtr)], map[description:The end LSN of the prepared transaction. format:Int64 (XLogRecPtr)], map[description:Prepare timestamp of the transaction. The value is in number of microseconds since PostgreSQL epoch (2000-01-01). format:Int64 (TimestampTz)], map[description:Xid of the transaction. format:Int32 (TransactionId)], map[description:The user defined GID of the prepared transaction. format:String]来源引用
定义来源
center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f
正文语言: en · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f