From 20d09c47867ae847b31a1c57846e8f3a36e3da00 Mon Sep 17 00:00:00 2001
From: Grigory Smolkin <g.smolkin@postgrespro.ru>
Date: Sat, 4 Jan 2020 19:52:11 +0300
Subject: [PATCH] Add some comments

---
 src/catalog.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/catalog.c b/src/catalog.c
index ae302d48..1fe8e4b2 100644
--- a/src/catalog.c
+++ b/src/catalog.c
@@ -716,7 +716,10 @@ catalog_get_timelines(InstanceConfig *instance)
 		parray *timelines;
 		xlogFile *wal_file = NULL;
 
-		/* regular WAL file */
+		/*
+		 * Regular WAL file.
+		 * IsXLogFileName() cannot be used here
+		 */
 		if (strspn(file->name, "0123456789ABCDEF") == XLOG_FNAME_LEN)
 		{
 			int result = 0;