mirror/postgresql
2
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2024-12-15 08:20:16 +08:00
Code Issues Packages Projects Releases Wiki Activity

Clean up the code for to_timestamp's conversion of year plus ISO day number

Browse Source 
to date, as per bug #4702 and subsequent discussion.  In particular, make it
work for years specified using AD/BC or CC fields, and fix the test for "no
year specified" so that it doesn't trigger inappropriately for 1 BC (which it
was doing even in code paths that had nothing to do with to_timestamp).  I
also did some minor code beautification in the non-ISO-day-number code path.

This area has been busted all along, but because the code has been rewritten
repeatedly, it would be considerable trouble to back-patch.  It's such a
corner case that it doesn't seem worth the effort.
This commit is contained in:
Tom Lane 2009-03-15 20:31:19 +00:00
parent 0f80200a8e
commit 7a52a8f829
2 changed files with 28 additions and 33 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

54
src/backend/utils/adt/formatting.c
View File

@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------
* formatting.c
*
* $PostgreSQL: pgsql/src/backend/utils/adt/formatting.c,v 1.155 2009/03/12 00:53:25 tgl Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/formatting.c,v 1.156 2009/03/15 20:31:19 tgl Exp $
*
*
* Portions Copyright (c) 1999-2009, PostgreSQL Global Development Group
@ -709,13 +709,13 @@ typedef enum
*/
static const KeyWord DCH_keywords[] = {
/* name, len, id, is_digit, date_mode */
{"A.D.", 4, DCH_A_D, FALSE, FROM_CHAR_DATE_GREGORIAN}, /* A */
{"A.D.", 4, DCH_A_D, FALSE, FROM_CHAR_DATE_NONE}, /* A */
{"A.M.", 4, DCH_A_M, FALSE, FROM_CHAR_DATE_NONE},
{"AD", 2, DCH_AD, FALSE, FROM_CHAR_DATE_GREGORIAN},
{"AD", 2, DCH_AD, FALSE, FROM_CHAR_DATE_NONE},
{"AM", 2, DCH_AM, FALSE, FROM_CHAR_DATE_NONE},
{"B.C.", 4, DCH_B_C, FALSE, FROM_CHAR_DATE_GREGORIAN}, /* B */
{"BC", 2, DCH_BC, FALSE, FROM_CHAR_DATE_GREGORIAN},
{"CC", 2, DCH_CC, TRUE, FROM_CHAR_DATE_GREGORIAN}, /* C */
{"B.C.", 4, DCH_B_C, FALSE, FROM_CHAR_DATE_NONE}, /* B */
{"BC", 2, DCH_BC, FALSE, FROM_CHAR_DATE_NONE},
{"CC", 2, DCH_CC, TRUE, FROM_CHAR_DATE_NONE}, /* C */
{"DAY", 3, DCH_DAY, FALSE, FROM_CHAR_DATE_NONE}, /* D */
{"DDD", 3, DCH_DDD, TRUE, FROM_CHAR_DATE_GREGORIAN},
{"DD", 2, DCH_DD, TRUE, FROM_CHAR_DATE_GREGORIAN},
@ -757,13 +757,13 @@ static const KeyWord DCH_keywords[] = {
{"YYY", 3, DCH_YYY, TRUE, FROM_CHAR_DATE_GREGORIAN},
{"YY", 2, DCH_YY, TRUE, FROM_CHAR_DATE_GREGORIAN},
{"Y", 1, DCH_Y, TRUE, FROM_CHAR_DATE_GREGORIAN},
{"a.d.", 4, DCH_a_d, FALSE, FROM_CHAR_DATE_GREGORIAN}, /* a */
{"a.d.", 4, DCH_a_d, FALSE, FROM_CHAR_DATE_NONE}, /* a */
{"a.m.", 4, DCH_a_m, FALSE, FROM_CHAR_DATE_NONE},
{"ad", 2, DCH_ad, FALSE, FROM_CHAR_DATE_GREGORIAN},
{"ad", 2, DCH_ad, FALSE, FROM_CHAR_DATE_NONE},
{"am", 2, DCH_am, FALSE, FROM_CHAR_DATE_NONE},
{"b.c.", 4, DCH_b_c, FALSE, FROM_CHAR_DATE_GREGORIAN}, /* b */
{"bc", 2, DCH_bc, FALSE, FROM_CHAR_DATE_GREGORIAN},
{"cc", 2, DCH_CC, TRUE, FROM_CHAR_DATE_GREGORIAN}, /* c */
{"b.c.", 4, DCH_b_c, FALSE, FROM_CHAR_DATE_NONE}, /* b */
{"bc", 2, DCH_bc, FALSE, FROM_CHAR_DATE_NONE},
{"cc", 2, DCH_CC, TRUE, FROM_CHAR_DATE_NONE}, /* c */
{"day", 3, DCH_day, FALSE, FROM_CHAR_DATE_NONE}, /* d */
{"ddd", 3, DCH_DDD, TRUE, FROM_CHAR_DATE_GREGORIAN},
{"dd", 2, DCH_DD, TRUE, FROM_CHAR_DATE_GREGORIAN},
@ -3281,41 +3281,41 @@ do_to_timestamp(text *date_txt, text *fmt,
* be interpreted as a Gregorian day-of-year, or an ISO week date
* day-of-year.
*/
if (!tm->tm_year && !tmfc.bc)
ereport(ERROR,
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
errmsg("cannot calculate day of year without year information")));
if (tmfc.mode == FROM_CHAR_DATE_ISOWEEK)
{
int j0; /* zeroth day of the ISO year, in Julian */
j0 = isoweek2j(tmfc.year, 1) - 1;
j0 = isoweek2j(tm->tm_year, 1) - 1;
j2date(j0 + tmfc.ddd, &tm->tm_year, &tm->tm_mon, &tm->tm_mday);
}
else
{
int *y,
i;
const int *y;
int i;
int ysum[2][13] = {
{31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365, 0},
{31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366, 0}};
if (!tm->tm_year)
ereport(ERROR,
(errcode(ERRCODE_INVALID_DATETIME_FORMAT),
errmsg("cannot calculate day of year without year information")));
static const int ysum[2][13] = {
{0, 31, 59, 90, 120, 151, 181, 212, 243, 273, 304, 334, 365},
{0, 31, 60, 91, 121, 152, 182, 213, 244, 274, 305, 335, 366}};
y = ysum[isleap(tm->tm_year)];
for (i = 0; i <= 11; i++)
for (i = 1; i <= 12; i++)
{
if (tm->tm_yday < y[i])
if (tmfc.ddd < y[i])
break;
}
if (tm->tm_mon <= 1)
tm->tm_mon = i + 1;
tm->tm_mon = i;
if (tm->tm_mday <= 1)
tm->tm_mday = i == 0 ? tm->tm_yday :
tm->tm_yday - y[i - 1];
tm->tm_mday = tmfc.ddd - y[i - 1];
}
}

7
src/backend/utils/adt/timestamp.c
View File

@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.196 2009/01/01 17:23:50 momjian Exp $
* $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.197 2009/03/15 20:31:19 tgl Exp $
*
*-------------------------------------------------------------------------
*/
@ -3668,11 +3668,6 @@ isoweek2j(int year, int week)
int day0,
day4;
if (!year)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
errmsg("cannot calculate week number without year information")));
/* fourth day of current year */
day4 = date2j(year, 1, 4);