Support for wal2json extension

January 5, 2026

PlanetScale for Postgres now supports the wal2json extension, version 2.6.

wal2json is a logical decoding output plugin that produces JSON format change data capture (CDC) output. This extension enables streaming database changes in a structured JSON format, making it ideal for:

• Building change data capture pipelines
• Real-time data synchronization between systems
• Event-driven architectures that react to database changes
• Integration with stream processing platforms like Kafka

The extension uses PostgreSQL's logical decoding feature to capture row-level changes (INSERT, UPDATE, DELETE) and outputs them as JSON objects, providing a flexible and widely-compatible format for downstream consumers.

Learn more about Postgres extensions