Re: Query regarding support of test_decoding and PGReplicationStream with Standby Logical Replication

Hi Kiran,

Are we trying to perform logical replication from create replication slots on a standby server and use logical decoding plugins(JDBC PGReplicationStream API) to stream changes from the standby

Is  my understanding correct?

            Hi, 

I have a question regarding the new feature introduced in PostgreSQL 16 that enables logical replication from a standby server.

Currently, we are using a standalone instance of PostgreSQL 16 and performing logical replication by creating replication slots and utilizing the JDBC replication stream API (PGReplicationStream)  with the test_decoding plugin.

Could you please confirm whether this approach of logical replication is supported from a standby system? Specifically, does the standby system support the test_decoding plugin and the JDBC PGReplicationStream API for streaming changes ?

Reference to JDBC Logical replication - https://jdbc.postgresql.org/documentation/server-prepare/#example-96-create-logical-replication-stream

Regards,

Kiran

Thanks 

Dinesh

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From: Kiran K V <kirankv.1982@gmail.com>
Sent: Friday, July 11, 2025 11:09 PM
To: pgsql-general@postgresql.org <pgsql-general@postgresql.org>
Subject: Query regarding support of test_decoding and PGReplicationStream with Standby Logical Replication

 

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Hi, 

I have a question regarding the new feature introduced in PostgreSQL 16 that enables logical replication from a standby server.

Currently, we are using a standalone instance of PostgreSQL 16 and performing logical replication by creating replication slots and utilizing the JDBC replication stream API (PGReplicationStream)  with the test_decoding plugin.

Could you please confirm whether this approach of logical replication is supported from a standby system? Specifically, does the standby system support the test_decoding plugin and the JDBC PGReplicationStream API for streaming changes ?

Reference to JDBC Logical replication - https://jdbc.postgresql.org/documentation/server-prepare/#example-96-create-logical-replication-stream

Regards,

Kiran