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Allow setting failover property in the replication command.

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This commit implements a new replication command called
ALTER_REPLICATION_SLOT and a corresponding walreceiver API function named
walrcv_alter_slot. Additionally, the CREATE_REPLICATION_SLOT command has
been extended to support the failover option.

These new additions allow the modification of the failover property of a
replication slot on the publisher. A subsequent commit will make use of
these commands in subscription commands and will add the tests as well to
cover the functionality added/changed by this commit.

Author: Hou Zhijie, Shveta Malik
Reviewed-by: Peter Smith, Bertrand Drouvot, Dilip Kumar, Masahiko Sawada, Nisha Moond, Kuroda, Hayato, Amit Kapila
Discussion: https://postgr.es/m/514f6f2f-6833-4539-39f1-96cd1e011f23@enterprisedb.com
This commit is contained in:
Amit Kapila
2024-01-29 09:10:00 +05:30
parent 08e6344fd6
commit 7329240437
13 changed files with 230 additions and 11 deletions
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50
doc/src/sgml/protocol.sgml
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@ -2060,6 +2060,16 @@ psql "dbname=postgres replication=database" -c "IDENTIFY_SYSTEM;"
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><literal>FAILOVER [ <replaceable class="parameter">boolean</replaceable> ]</literal></term>
<listitem>
<para>
If true, the slot is enabled to be synced to the standbys.
The default is false.
</para>
</listitem>
</varlistentry>
</variablelist>
<para>
@ -2124,6 +2134,46 @@ psql "dbname=postgres replication=database" -c "IDENTIFY_SYSTEM;"
</listitem>
</varlistentry>
<varlistentry id="protocol-replication-alter-replication-slot" xreflabel="ALTER_REPLICATION_SLOT">
<term><literal>ALTER_REPLICATION_SLOT</literal> <replaceable class="parameter">slot_name</replaceable> ( <replaceable class="parameter">option</replaceable> [, ...] )
<indexterm><primary>ALTER_REPLICATION_SLOT</primary></indexterm>
</term>
<listitem>
<para>
Change the definition of a replication slot.
See <xref linkend="streaming-replication-slots"/> for more about
replication slots. This command is currently only supported for logical
replication slots.
</para>
<variablelist>
<varlistentry>
<term><replaceable class="parameter">slot_name</replaceable></term>
<listitem>
<para>
The name of the slot to alter. Must be a valid replication slot
name (see <xref linkend="streaming-replication-slots-manipulation"/>).
</para>
</listitem>
</varlistentry>
</variablelist>
<para>The following option is supported:</para>
<variablelist>
<varlistentry>
<term><literal>FAILOVER [ <replaceable class="parameter">boolean</replaceable> ]</literal></term>
<listitem>
<para>
If true, the slot is enabled to be synced to the standbys.
</para>
</listitem>
</varlistentry>
</variablelist>
</listitem>
</varlistentry>
<varlistentry id="protocol-replication-read-replication-slot">
<term><literal>READ_REPLICATION_SLOT</literal> <replaceable class="parameter">slot_name</replaceable>
<indexterm><primary>READ_REPLICATION_SLOT</primary></indexterm>