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pg_resetwal: Add --char-signedness option to change the default char signedness.

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With the newly added option --char-signedness, pg_resetwal updates the
default char signedness flag in the controlfile. This option is
primarily intended for an upcoming patch that pg_upgrade supports
preserving the default char signedness during upgrades, and is not
meant for manual operation.

Reviewed-by: Noah Misch <noah@leadboat.com>
Discussion: https://postgr.es/m/CB11ADBC-0C3F-4FE0-A678-666EE80CBB07%40amazon.com
This commit is contained in:
Masahiko Sawada
2025-02-21 10:14:36 -08:00
parent 44fe30fdab
commit 30666d1857
3 changed files with 50 additions and 0 deletions
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19
doc/src/sgml/ref/pg_resetwal.sgml
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@ -171,6 +171,25 @@ PostgreSQL documentation
</para>
<variablelist>
<varlistentry>
<term><option>--char-signedness=<replaceable class="parameter">option</replaceable></option></term>
<listitem>
<para>
Manually set the default char signedness. Possible values are
<literal>signed</literal> and <literal>unsigned</literal>.
</para>
<para>
For a database cluster that <command>pg_upgrade</command> upgraded from
a <productname>PostgreSQL</productname> version before 18, the safe
value would be the default <type>char</type> signedness of the platform
that ran the cluster before that upgrade. For all other
clusters, <literal>signed</literal> would be the safe value. However,
this option is exclusively for use with <command>pg_upgrade</command>
and should not normally be used manually.
</para>
</listitem>
</varlistentry>
<varlistentry>
<term><option>-c <replaceable class="parameter">xid</replaceable>,<replaceable class="parameter">xid</replaceable></option></term>
<term><option>--commit-timestamp-ids=<replaceable class="parameter">xid</replaceable>,<replaceable class="parameter">xid</replaceable></option></term>