From: Bruce Momjian <bruce@momjian.us>
Date: Wed, 8 Aug 2012 17:26:39 +0000 (-0400)
Subject: Add additional C comments for to_date/to_char() fixes.
X-Git-Tag: REL9_3_BETA1~1124
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=2751740ab5c01b2ffc8afdb86b4c2c2bf37203e0;p=postgresql

Add additional C comments for to_date/to_char() fixes.
---

diff --git a/src/backend/utils/adt/formatting.c b/src/backend/utils/adt/formatting.c
index ddb89c463b..25af8a212b 100644
--- a/src/backend/utils/adt/formatting.c
+++ b/src/backend/utils/adt/formatting.c
@@ -3504,8 +3504,10 @@ do_to_timestamp(text *date_txt, text *fmt,
 		if (tmfc.bc)
 			tmfc.cc = -tmfc.cc;
 		if (tmfc.cc >= 0)
+			/* +1 becuase 21st century started in 2001 */
 			tm->tm_year = (tmfc.cc - 1) * 100 + 1;
 		else
+			/* +1 because year == 599 is 600 BC */
 			tm->tm_year = tmfc.cc * 100 + 1;
 	}