Type (logical replication)

Logical replication Type format. Identifies the message as a type message.

当前阅读 PG 18·选择有来源记录的版本

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Layer: Logical replication payload; distinct from the frontend/backend message envelope
First field: Byte1('Y')
manual path: /docs/18/protocol-logicalrep-message-formats.html
signature: Type

版本定义 PG 18

Byte1('Y'): Identifies the message as a type message.
Int32 (TransactionId): Xid of the transaction (only present for streamed transactions). This field is available since protocol version 2.
Int32 (Oid): OID of the data type.
String: Namespace (empty string for pg_catalog).
String: Name of the data type.

Fields in documented order

Position	Format	Meaning
1	Byte1('Y')	Identifies the message as a type message.
2	Int32 (TransactionId)	Xid of the transaction (only present for streamed transactions). This field is available since protocol version 2.
3	Int32 (Oid)	OID of the data type.
4	String	Namespace (empty string for pg_catalog ).
5	String	Name of the data type.

比较版本

完整来源事实

fields

map[description:Identifies the message as a type message. format:Byte1('Y')], map[description:Xid of the transaction (only present for streamed transactions). This field is available since protocol version 2. format:Int32 (TransactionId)], map[description:OID of the data type. format:Int32 (Oid)], map[description:Namespace (empty string for pg_catalog ). format:String], map[description:Name of the data type. format:String]

来源引用

完整定义与证据 JSON

定义来源

center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f