From 8facf1ea00b7a0c08c755a0392212b83e04ae28a Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Sat, 13 Feb 2021 13:50:49 -0500
Subject: README/C-comment:  document GiST's NSN value

---
 src/include/access/gist.h | 1 +
 1 file changed, 1 insertion(+)

(limited to 'src/include/access/gist.h')

diff --git a/src/include/access/gist.h b/src/include/access/gist.h
index 00c6b4f2bb9..aa5f1763dd0 100644
--- a/src/include/access/gist.h
+++ b/src/include/access/gist.h
@@ -51,6 +51,7 @@
 #define F_HAS_GARBAGE		(1 << 4)	/* some tuples on the page are dead,
 										 * but not deleted yet */
 
+/* NSN - node sequence number, a special-purpose LSN */
 typedef XLogRecPtr GistNSN;
 
 /*
-- 
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