Forked from eulerto/wal2json for integration with StreamSets Datacollector PostgreSQL CDC implementation.
wal2json is an output plugin for logical decoding. It means that the plugin have access to tuples produced by INSERT and UPDATE. Also, UPDATE/DELETE old row versions can be accessed depending on the configured replica identity. Changes can be consumed using the streaming protocol (logical replication slots) or by a special SQL API.
The wal2json output plugin produces a JSON object per transaction. All of the new/old tuples are available in the JSON object. Also, there are options to include properties such as transaction timestamp, schema-qualified, data types, and transaction ids.
wal2json is released under PostgreSQL license.
- PostgreSQL 9.4+
Build and Install
This extension is supported on those platforms that PostgreSQL is. The installation steps depend on your operating system.
You can also keep up with the latest fixes and features cloning the Git repository.
$ git clone https://github.com/streamsets/wal2json.git
Unix based Operating Systems
Before use this extension, you should build it and load it at the desirable database.
$ git clone https://github.com/streamsets/wal2json.git $ PATH=/path/to/bin/pg_config:$PATH $ USE_PGXS=1 make $ USE_PGXS=1 make install
You need to set up the following parameters in postgresql.conf
wal_level = logical max_replication_slots = 1 wal_sender_timeoute = 2000
After changing these parameters, a restart is needed.
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