From c38cadc0907a8d071b043b2b32b83efa09db38ea Mon Sep 17 00:00:00 2001
From: Tom Lane <tgl@sss.pgh.pa.us>
Date: Thu, 6 May 2021 09:59:11 -0400
Subject: [PATCH] Doc: trivial wording adjustment.

Improve self-referential foreign key example, per suggestion
from David Johnston.

Discussion: https://postgr.es/m/CAKFQuwZTke7+HUn4YUGqu2+gAPi4Cy18TXMrg_Z5nADkxfPNMw@mail.gmail.com
---
 doc/src/sgml/ddl.sgml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/doc/src/sgml/ddl.sgml b/doc/src/sgml/ddl.sgml
index 513112a216d..b4648321dc4 100644
--- a/doc/src/sgml/ddl.sgml
+++ b/doc/src/sgml/ddl.sgml
@@ -956,7 +956,7 @@ CREATE TABLE tree (
 );
 </programlisting>
     A top-level node would have NULL <structfield>parent_id</structfield>,
-    but non-NULL <structfield>parent_id</structfield> entries would be
+    while non-NULL <structfield>parent_id</structfield> entries would be
     constrained to reference valid rows of the table.
    </para>