---
title: "Logical Decoding SQL Interface"
id: logicaldecoding-sql
pg_version: "20devel"
---

<a id="logicaldecoding-sql"></a>

## 47.4. Logical Decoding SQL Interface

See [Section 9.29.6](functions-admin.md#functions-replication) for detailed documentation on the SQL-level API for interacting with logical decoding. 

Synchronous replication (see [Section 26.2.8](warm-standby.md#synchronous-replication)) is only supported on replication slots used over the streaming replication interface. The function interface and additional, non-core interfaces do not support synchronous replication.