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pg_createsubscriber: Add -R publications option.

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This patch introduces a new '-R'/'--remove' option in the
'pg_createsubscriber' utility to specify the object types to be removed
from the subscriber. Currently, we add support to specify 'publications'
as an object type. In the future, other object types like failover-slots
could be added.

This feature allows optionally to remove publications on the subscriber
that were replicated from the primary server (before running this tool)
during physical replication. Users may want to retain these publications
in case they want some pre-existing subscribers to point to the newly
created subscriber.

Author: Shubham Khanna <khannashubham1197@gmail.com>
Reviewed-by: Peter Smith <smithpb2250@gmail.com>
Reviewed-by: David G. Johnston <david.g.johnston@gmail.com>
Reviewed-by: Euler Taveira <euler@eulerto.com>
Reviewed-by: Zhijie Hou <houzj.fnst@fujitsu.com>
Reviewed-by: vignesh C <vignesh21@gmail.com>
Reviewed-by: Nisha Moond <nisha.moond412@gmail.com>
Reviewed-by: Amit Kapila <amit.kapila16@gmail.com>
Discussion: https://postgr.es/m/CAHv8RjL4OvoYafofTb_U_JD5HuyoNowBoGpMfnEbhDSENA74Kg@mail.gmail.com
This commit is contained in:
Amit Kapila
2025-03-20 12:21:54 +05:30
parent 5941946d09
commit e5aeed4b80
3 changed files with 136 additions and 17 deletions
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23
doc/src/sgml/ref/pg_createsubscriber.sgml
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@ -146,6 +146,29 @@ PostgreSQL documentation
</listitem>
</varlistentry>
<varlistentry>
<term><option>-R</option></term>
<term><option>--remove</option></term>
<listitem>
<para>
Remove all objects of the specified type from specified databases on the
target server.
</para>
<para>
publications: The "all tables" publications established for this
subscriber are always removed; specifying this object type causes all
other publications replicated from the source server to be dropped as
well.
</para>
<para>
The objects selected to be dropped are individually logged and do show
up in a --dry-run. There is no opportunity to affect or stop the
dropping of the selected objects so consider taking a backup of them
using pg_dump.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-s <replaceable class="parameter">dir</replaceable></option></term>
<term><option>--socketdir=<replaceable class="parameter">dir</replaceable></option></term>