database/postgres
1
0
Fork 0
mirror of https://github.com/postgres/postgres.git synced 2025-06-13 07:41:39 +03:00
Code Activity

Allow pgoutput to send logical decoding messages.

Browse Source 
The output plugin accepts a new parameter (messages) that controls if
logical decoding messages are written into the replication stream. It is
useful for those clients that use pgoutput as an output plugin and needs
to process messages that were written by pg_logical_emit_message().

Although logical streaming replication protocol supports logical
decoding messages now, logical replication does not use this feature yet.

Author: David Pirotte, Euler Taveira
Reviewed-by: Euler Taveira, Andres Freund, Ashutosh Bapat, Amit Kapila
Discussion: https://postgr.es/m/CADK3HHJ-+9SO7KuRLH=9Wa1rAo60Yreq1GFNkH_kd0=CdaWM+A@mail.gmail.com
This commit is contained in:
Amit Kapila
2021-04-06 08:40:47 +05:30
parent 531737ddad
commit ac4645c015
7 changed files with 312 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

76
doc/src/sgml/protocol.sgml
View File

@ -6433,6 +6433,82 @@ Begin
</listitem>
</varlistentry>
<varlistentry>
<term>
Message
</term>
<listitem>
<para>
<variablelist>
<varlistentry>
<term>
Byte1('M')
</term>
<listitem>
<para>
Identifies the message as a logical decoding message.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
Int32
</term>
<listitem>
<para>
Xid of the transaction. The XID is sent only when user has
requested streaming of in-progress transactions.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
Int8
</term>
<listitem>
<para>
Flags; Either 0 for no flags or 1 if the logical decoding
message is transactional.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
Int64
</term>
<listitem>
<para>
The LSN of the logical decoding message.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
String
</term>
<listitem>
<para>
The prefix of the logical decoding message.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
Byte<replaceable>n</replaceable>
</term>
<listitem>
<para>
The content of the logical decoding message.
</para>
</listitem>
</varlistentry>
</variablelist>
</para>
</listitem>
</varlistentry>
<varlistentry>
<term>
Commit