Stream Abort (logical replication)

Logical replication Stream Abort format. Identifies the message as a stream abort message.

Reading PG 18·Select a recorded version

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

Definition PG 18

Byte1('A'): Identifies the message as a stream abort message.
Int32 (TransactionId): Xid of the transaction.
Int32 (TransactionId): Xid of the subtransaction (will be same as xid of the transaction for top-level transactions).
Int64 (XLogRecPtr): The LSN of the abort operation, present only when streaming is set to parallel. This field is available since protocol version 4.
Int64 (TimestampTz): Abort timestamp of the transaction, present only when streaming is set to parallel. The value is in number of microseconds since PostgreSQL epoch (2000-01-01). This field is available since protocol version 4.

Fields in documented order

Position	Format	Meaning
1	Byte1('A')	Identifies the message as a stream abort message.
2	Int32 (TransactionId)	Xid of the transaction.
3	Int32 (TransactionId)	Xid of the subtransaction (will be same as xid of the transaction for top-level transactions).
4	Int64 (XLogRecPtr)	The LSN of the abort operation, present only when streaming is set to parallel. This field is available since protocol version 4.
5	Int64 (TimestampTz)	Abort timestamp of the transaction, present only when streaming is set to parallel. The value is in number of microseconds since PostgreSQL epoch (2000-01-01). This field is available since protocol version 4.

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Complete source facts

fields

map[description:Identifies the message as a stream abort message. format:Byte1('A')], map[description:Xid of the transaction. format:Int32 (TransactionId)], map[description:Xid of the subtransaction (will be same as xid of the transaction for top-level transactions). format:Int32 (TransactionId)], map[description:The LSN of the abort operation, present only when streaming is set to parallel. This field is available since protocol version 4. format:Int64 (XLogRecPtr)], map[description:Abort timestamp of the transaction, present only when streaming is set to parallel. The value is in number of microseconds since PostgreSQL epoch (2000-01-01). This field is available since protocol version 4. format:Int64 (TimestampTz)]

Source references

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · 555610c24d53e4316da5b7d3fc25c279d96856d5e0e23ee308c328c5fa881d9f