On Fri, Aug 3, 2012 at 06:51:45PM -0400, Bruce Momjian wrote:
> I also tested boundry values, e.g. 6th Century BC is 600-501:
>
> test=> select to_char('0600-01-01 00:00:00 BC' :: timestamp, 'CC');
> to_char
> ---------
> -6
> (1 row)
>
> test=> select to_char('0599-01-01 00:00:00 BC' :: timestamp, 'CC');
> to_char
> ---------
> -6
> (1 row)
>
> test=> select to_char('0501-01-01 00:00:00 BC' :: timestamp, 'CC');
> to_char
> ---------
> -6
> (1 row)
>
> test=> select to_char('0500-01-01 00:00:00 BC' :: timestamp, 'CC');
> to_char
> ---------
> -5
> (1 row)
>
> I am thinking it is too late to apply this for 9.2 because users might
> have already tested their applications, though I doubt many are using BC
> dates. Feedback?
There is never just one bug in formatting.c --- the input side was also
broken for BC/negative centuries. The attached patch fixes the input
side as well, and shows the old/fixed output for BC centuries. The test
queries were:
SELECT to_date('-6 4', 'CC YY');
SELECT to_date(' 6 4', 'CC YY');
SELECT to_date('-6 00', 'CC YY');
SELECT to_date(' 6 00', 'CC YY');
SELECT to_date('-6', 'CC');
SELECT to_date(' 6', 'CC');
I believe this is all for 9.3-only.
--
Bruce Momjian <br...@momjian.us> http://momjian.us
EnterpriseDB http://enterprisedb.com
+ It's impossible for everything to be true. +
diff --git a/src/backend/utils/adt/formatting.c b/src/backend/utils/adt/formatting.c
new file mode 100644
index 4347ad3..7eb573d
*** a/src/backend/utils/adt/formatting.c
--- b/src/backend/utils/adt/formatting.c
*************** DCH_to_char(FormatNode *node, bool is_in
*** 2640,2647 ****
case DCH_CC:
if (is_interval) /* straight calculation */
i = tm->tm_year / 100;
! else /* century 21 starts in 2001 */
! i = (tm->tm_year - 1) / 100 + 1;
if (i <= 99 && i >= -99)
sprintf(s, "%0*d", S_FM(n->suffix) ? 0 : 2, i);
else
--- 2640,2654 ----
case DCH_CC:
if (is_interval) /* straight calculation */
i = tm->tm_year / 100;
! else
! {
! if (tm->tm_year > 0)
! /* Century 20 == 1901 - 2000 */
! i = (tm->tm_year - 1) / 100 + 1;
! else
! /* Century 6BC == 600BC - 501BC */
! i = tm->tm_year / 100 - 1;
! }
if (i <= 99 && i >= -99)
sprintf(s, "%0*d", S_FM(n->suffix) ? 0 : 2, i);
else
*************** do_to_timestamp(text *date_txt, text *fm
*** 3473,3487 ****
{
tm->tm_year = tmfc.year % 100;
if (tm->tm_year)
! tm->tm_year += (tmfc.cc - 1) * 100;
else
! tm->tm_year = tmfc.cc * 100;
}
else
tm->tm_year = tmfc.year;
}
else if (tmfc.cc) /* use first year of century */
! tm->tm_year = (tmfc.cc - 1) * 100 + 1;
if (tmfc.bc)
{
--- 3480,3504 ----
{
tm->tm_year = tmfc.year % 100;
if (tm->tm_year)
! {
! if (tmfc.cc >= 0)
! tm->tm_year += (tmfc.cc - 1) * 100;
! else
! tm->tm_year = (tmfc.cc + 1) * 100 - tm->tm_year + 1;
! }
else
! tm->tm_year = tmfc.cc * 100 + ((tmfc.cc >= 0) ? 0 : 1);
}
else
tm->tm_year = tmfc.year;
}
else if (tmfc.cc) /* use first year of century */
! {
! if (tmfc.cc >= 0)
! tm->tm_year = (tmfc.cc - 1) * 100 + 1;
! else
! tm->tm_year = tmfc.cc * 100 + 1;
! }
if (tmfc.bc)
{
diff --git a/src/test/regress/expected/timestamp.out b/src/test/regress/expected/timestamp.out
new file mode 100644
index ab8faab..db2cfe6
*** a/src/test/regress/expected/timestamp.out
--- b/src/test/regress/expected/timestamp.out
*************** SELECT '' AS to_char_3, to_char(d1, 'Y,Y
*** 992,998 ****
| 1,997 1997 997 97 7 20 1 02 07 045 14 6 2450494
| 1,997 1997 997 97 7 20 1 02 07 046 15 7 2450495
| 1,997 1997 997 97 7 20 1 02 07 047 16 1 2450496
! | 0,097 0097 097 97 7 01 1 02 07 047 16 3 1686042
| 0,097 0097 097 97 7 01 1 02 07 047 16 7 1756536
| 0,597 0597 597 97 7 06 1 02 07 047 16 5 1939157
| 1,097 1097 097 97 7 11 1 02 07 047 16 3 2121778
--- 992,998 ----
| 1,997 1997 997 97 7 20 1 02 07 045 14 6 2450494
| 1,997 1997 997 97 7 20 1 02 07 046 15 7 2450495
| 1,997 1997 997 97 7 20 1 02 07 047 16 1 2450496
! | 0,097 0097 097 97 7 -1 1 02 07 047 16 3 1686042
| 0,097 0097 097 97 7 01 1 02 07 047 16 7 1756536
| 0,597 0597 597 97 7 06 1 02 07 047 16 5 1939157
| 1,097 1097 097 97 7 11 1 02 07 047 16 3 2121778
*************** SELECT '' AS to_char_4, to_char(d1, 'FMY
*** 1063,1069 ****
| 1,997 1997 997 97 7 20 1 2 7 45 14 6 2450494
| 1,997 1997 997 97 7 20 1 2 7 46 15 7 2450495
| 1,997 1997 997 97 7 20 1 2 7 47 16 1 2450496
! | 0,097 97 97 97 7 1 1 2 7 47 16 3 1686042
| 0,097 97 97 97 7 1 1 2 7 47 16 7 1756536
| 0,597 597 597 97 7 6 1 2 7 47 16 5 1939157
| 1,097 1097 97 97 7 11 1 2 7 47 16 3 2121778
--- 1063,1069 ----
| 1,997 1997 997 97 7 20 1 2 7 45 14 6 2450494
| 1,997 1997 997 97 7 20 1 2 7 46 15 7 2450495
| 1,997 1997 997 97 7 20 1 2 7 47 16 1 2450496
! | 0,097 97 97 97 7 -1 1 2 7 47 16 3 1686042
| 0,097 97 97 97 7 1 1 2 7 47 16 7 1756536
| 0,597 597 597 97 7 6 1 2 7 47 16 5 1939157
| 1,097 1097 97 97 7 11 1 2 7 47 16 3 2121778
diff --git a/src/test/regress/expected/timestamptz.out b/src/test/regress/expected/timestamptz.out
new file mode 100644
index 9a4ce3e..6581b5e
*** a/src/test/regress/expected/timestamptz.out
--- b/src/test/regress/expected/timestamptz.out
*************** SELECT '' AS to_char_3, to_char(d1, 'Y,Y
*** 1074,1080 ****
| 1,997 1997 997 97 7 20 1 02 07 045 14 6 2450494
| 1,997 1997 997 97 7 20 1 02 07 046 15 7 2450495
| 1,997 1997 997 97 7 20 1 02 07 047 16 1 2450496
! | 0,097 0097 097 97 7 01 1 02 07 047 16 3 1686042
| 0,097 0097 097 97 7 01 1 02 07 047 16 7 1756536
| 0,597 0597 597 97 7 06 1 02 07 047 16 5 1939157
| 1,097 1097 097 97 7 11 1 02 07 047 16 3 2121778
--- 1074,1080 ----
| 1,997 1997 997 97 7 20 1 02 07 045 14 6 2450494
| 1,997 1997 997 97 7 20 1 02 07 046 15 7 2450495
| 1,997 1997 997 97 7 20 1 02 07 047 16 1 2450496
! | 0,097 0097 097 97 7 -1 1 02 07 047 16 3 1686042
| 0,097 0097 097 97 7 01 1 02 07 047 16 7 1756536
| 0,597 0597 597 97 7 06 1 02 07 047 16 5 1939157
| 1,097 1097 097 97 7 11 1 02 07 047 16 3 2121778
*************** SELECT '' AS to_char_4, to_char(d1, 'FMY
*** 1146,1152 ****
| 1,997 1997 997 97 7 20 1 2 7 45 14 6 2450494
| 1,997 1997 997 97 7 20 1 2 7 46 15 7 2450495
| 1,997 1997 997 97 7 20 1 2 7 47 16 1 2450496
! | 0,097 97 97 97 7 1 1 2 7 47 16 3 1686042
| 0,097 97 97 97 7 1 1 2 7 47 16 7 1756536
| 0,597 597 597 97 7 6 1 2 7 47 16 5 1939157
| 1,097 1097 97 97 7 11 1 2 7 47 16 3 2121778
--- 1146,1152 ----
| 1,997 1997 997 97 7 20 1 2 7 45 14 6 2450494
| 1,997 1997 997 97 7 20 1 2 7 46 15 7 2450495
| 1,997 1997 997 97 7 20 1 2 7 47 16 1 2450496
! | 0,097 97 97 97 7 -1 1 2 7 47 16 3 1686042
| 0,097 97 97 97 7 1 1 2 7 47 16 7 1756536
| 0,597 597 597 97 7 6 1 2 7 47 16 5 1939157
| 1,097 1097 97 97 7 11 1 2 7 47 16 3 2121778
*** /rtmp/bad.out 2012-08-04 10:23:51.000000000 -0400
--- /rtmp/good.out 2012-08-04 10:25:41.000000000 -0400
***************
*** 1,7 ****
SELECT to_date('-6 4', 'CC YY');
to_date
---------------
! 0697-01-01 BC
(1 row)
SELECT to_date(' 6 4', 'CC YY');
--- 1,7 ----
SELECT to_date('-6 4', 'CC YY');
to_date
---------------
! 0504-01-01 BC
(1 row)
SELECT to_date(' 6 4', 'CC YY');
***************
*** 13,19 ****
SELECT to_date('-6 00', 'CC YY');
to_date
---------------
! 0601-01-01 BC
(1 row)
SELECT to_date(' 6 00', 'CC YY');
--- 13,19 ----
SELECT to_date('-6 00', 'CC YY');
to_date
---------------
! 0600-01-01 BC
(1 row)
SELECT to_date(' 6 00', 'CC YY');
***************
*** 25,31 ****
SELECT to_date('-6', 'CC');
to_date
---------------
! 0700-01-01 BC
(1 row)
SELECT to_date(' 6', 'CC');
--- 25,31 ----
SELECT to_date('-6', 'CC');
to_date
---------------
! 0600-01-01 BC
(1 row)
SELECT to_date(' 6', 'CC');
--
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