## 49.4. Logical Decoding SQL Interface

 See [Section 9.27.6](functions-admin.html#FUNCTIONS-REPLICATION) for detailed documentation on the SQL-level API for interacting with logical decoding.

 Synchronous replication (see [Section 27.2.8](warm-standby.html#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.

