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<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>49.7. Logical Decoding Output Writers</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets Vsnapshot" /><link rel="prev" href="logicaldecoding-output-plugin.html" title="49.6. Logical Decoding Output Plugins" /><link rel="next" href="logicaldecoding-synchronous.html" title="49.8. Synchronous Replication Support for Logical Decoding" /></head><body id="docContent" class="container-fluid col-10"><div class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">49.7. Logical Decoding Output Writers</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="logicaldecoding-output-plugin.html" title="49.6. Logical Decoding Output Plugins">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="logicaldecoding.html" title="Chapter 49. Logical Decoding">Up</a></td><th width="60%" align="center">Chapter 49. Logical Decoding</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 16.2 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="logicaldecoding-synchronous.html" title="49.8. Synchronous Replication Support for Logical Decoding">Next</a></td></tr></table><hr /></div><div class="sect1" id="LOGICALDECODING-WRITER"><div class="titlepage"><div><div><h2 class="title" style="clear: both">49.7. Logical Decoding Output Writers <a href="#LOGICALDECODING-WRITER" class="id_link">#</a></h2></div></div></div><p>
It is possible to add more output methods for logical decoding.
For details, see
<code class="filename">src/backend/replication/logical/logicalfuncs.c</code>.
Essentially, three functions need to be provided: one to read WAL, one to
prepare writing output, and one to write the output
(see <a class="xref" href="logicaldecoding-output-plugin.html#LOGICALDECODING-OUTPUT-PLUGIN-OUTPUT" title="49.6.5. Functions for Producing Output">Section 49.6.5</a>).
</p></div><div class="navfooter"><hr /><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="logicaldecoding-output-plugin.html" title="49.6. Logical Decoding Output Plugins">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="logicaldecoding.html" title="Chapter 49. Logical Decoding">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="logicaldecoding-synchronous.html" title="49.8. Synchronous Replication Support for Logical Decoding">Next</a></td></tr><tr><td width="40%" align="left" valign="top">49.6. Logical Decoding Output Plugins </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 16.2 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 49.8. Synchronous Replication Support for Logical Decoding</td></tr></table></div></body></html>
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