implemented by <quote>walsender</quote> and <quote>apply</quote>

processes. The walsender process starts logical decoding (described

in <xref linkend="logicaldecoding"/>) of the WAL and loads the standard

logical decoding plugin (pgoutput). The plugin transforms the changes read

logical decoding output plugin (<literal>pgoutput</literal>). The plugin

transforms the changes read

from WAL to the logical replication protocol

(see <xref linkend="protocol-logical-replication"/>) and filters the data

according to the publication specification. The data is then continuously

<term><replaceable class="parameter">option_name</replaceable></term>

<listitem>

<para>

The name of an option passed to the slot's logical decoding plugin.

The name of an option passed to the slot's logical decoding output

plugin. See <xref linkend="protocol-logical-replication"/> for

options that are accepted by the standard (<literal>pgoutput</literal>)

plugin.

</para>

</listitem>

</varlistentry>

the physical streaming replication protocol.

</para>

<para>

<productname>PostgreSQL</productname> logical decoding supports output

plugins. <literal>pgoutput</literal> is the standard one used for

the built-in logical replication.

</para>

<sect2 id="protocol-logical-replication-params">

<title>Logical Streaming Replication Parameters</title>

<para>

The logical replication<literal>START_REPLICATION</literal> command

accepts followingparameters:

Using the<literal>START_REPLICATION</literal> command,

<literal>pgoutput</literal>acceptsthefollowingoptions:

<variablelist>

<varlistentry>

<listitem>

<para>

Protocol version. Currently versions <literal>1</literal> and

<literal>2</literal> are supported. The version <literal>2</literal>

<literal>2</literal> are supported. A valid version is required.

The version <literal>2</literal>

is supported only for server version 14 and above, and it allows

streaming of large in-progress transactions.

</para>

Comma separated list of publication names for which to subscribe

(receive changes). The individual publication names are treated

as standard objects names and can be quoted the same as needed.

At least one publication name is required.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term>

binary

</term>

<listitem>

<para>

Boolean option to use binary transfer mode. Binary mode is faster

than the text mode but slightly less robust.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term>

messages

</term>

<listitem>

<para>

Boolean option to enable sending the messages that are written

by <function>pg_logical_emit_message</function>.

</para>

</listitem>

</varlistentry>

<varlistentry>

<term>

streaming

</term>

<listitem>

<para>

Boolean option to enable streaming of in-progress transactions.

Minimum protocol version 2 is required to turn it on.

</para>

</listitem>

</varlistentry>