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- <code class="filename">test_decoding</code> is an example of a logical decoding
- output plugin. It doesn't do anything especially useful, but can serve as
- a starting point for developing your own output plugin.
- </p><p>
- <code class="filename">test_decoding</code> receives WAL through the logical decoding
- mechanism and decodes it into text representations of the operations
- performed.
- </p><p>
- Typical output from this plugin, used over the SQL logical decoding
- interface, might be:
-
- </p><pre class="programlisting">
- postgres=# SELECT * FROM pg_logical_slot_get_changes('test_slot', NULL, NULL, 'include-xids', '0');
- lsn | xid | data
- -----------+-----+--------------------------------------------------
- 0/16D30F8 | 691 | BEGIN
- 0/16D32A0 | 691 | table public.data: INSERT: id[int4]:2 data[text]:'arg'
- 0/16D32A0 | 691 | table public.data: INSERT: id[int4]:3 data[text]:'demo'
- 0/16D32A0 | 691 | COMMIT
- 0/16D32D8 | 692 | BEGIN
- 0/16D3398 | 692 | table public.data: DELETE: id[int4]:2
- 0/16D3398 | 692 | table public.data: DELETE: id[int4]:3
- 0/16D3398 | 692 | COMMIT
- (8 rows)
- </pre><p>
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