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commit    a79ede0a4ebff1434d6ffd2a15339a1c574bbf6e
Author:   Michael Paquier <michael@paquier.xyz>
Date:     Tue May 20 05:39:15 2025 +0000

    doc: Clarify use of _ccnew and _ccold in REINDEX CONCURRENTLY
    
    Invalid indexes are suffixed with "_ccnew" or "_ccold".  The
    documentation missed to mention the initial underscore.
    ChooseRelationName() may also append an extra number if indexes with a
    similar name already exist; let's add a note about that too.
    
    Author: Alec Cozens <acozens@pixelpower.com>
    Discussion: https://postgr.es/m/174733277404.1455388.11471370288789479593@wrigleys.postgresql.org
    Backpatch-through: 13


 doc/src/sgml/ref/reindex.sgml | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/doc/src/sgml/ref/reindex.sgml b/doc/src/sgml/ref/reindex.sgml
index 22dbb520d52..ad4d535acff 100644
--- a/doc/src/sgml/ref/reindex.sgml
+++ b/doc/src/sgml/ref/reindex.sgml
@@ -446,14 +446,17 @@ Indexes:
 </programlisting>
 
     If the index marked <literal>INVALID</literal> is suffixed
-    <literal>ccnew</literal>, then it corresponds to the transient
+    <literal>_ccnew</literal>, then it corresponds to the transient
     index created during the concurrent operation, and the recommended
     recovery method is to drop it using <literal>DROP INDEX</literal>,
     then attempt <command>REINDEX CONCURRENTLY</command> again.
-    If the invalid index is instead suffixed <literal>ccold</literal>,
+    If the invalid index is instead suffixed <literal>_ccold</literal>,
     it corresponds to the original index which could not be dropped;
     the recommended recovery method is to just drop said index, since the
     rebuild proper has been successful.
+    A nonzero number may be appended to the suffix of the invalid index
+    names to keep them unique, like <literal>_ccnew1</literal>,
+    <literal>_ccold2</literal>, etc.
    </para>
 
    <para>


[parent: 0420b24fee5e]