Note: The following description applies both to Postgres-XC and PostgreSQL if not described explicitly.
To commit a prepared transaction, you must be either the same user that executed the transaction originally, or a superuser. But you do not have to be in the same session that executed the transaction.
This command cannot be executed inside a transaction block. The prepared transaction is committed immediately.
All currently available prepared transactions are listed in the pg_prepared_xacts system view.
Note: The following description applies only to Postgres-XC
If more than one Datanode and/or Coordinator are involved in the transaction, COMMIT PREPARED command will propagate to all these nodes.
Note: The following description applies only to Postgres-XC
If xc_maintenance_mode GUC parameter is set to ON, COMMIT PREPARED will not propagate to other nodes. It just runs locally and report the result to GTM.
Commit the transaction identified by the transaction identifier foobar:
COMMIT PREPARED 'foobar';