From 1c757c49fa95c8db90fae69787ac27d5ebabad4b Mon Sep 17 00:00:00 2001
From: Bruce Momjian <bruce@momjian.us>
Date: Thu, 25 Dec 2003 03:36:24 +0000
Subject: [PATCH] > > I have no idea if this in Oracle or not. But it's
something I > > needed, and other people in the past asked about it too. > >
It is in Oracle, but you aren't exactly on the spot. It should be > > IYYY -
4 digits ('2003') > IYY - 3 digits ('003') > IY - 2 digits ('03') > I
- 1 digit ('3')
Here is an updated patch that does that.
Kurt Roeckx
---
doc/src/sgml/func.sgml | 18 ++++-
src/backend/utils/adt/formatting.c | 57 ++++++++++++++--
src/backend/utils/adt/timestamp.c | 62 ++++++++++++++++-
src/include/utils/timestamp.h | 3 +-
src/test/regress/expected/timestamptz.out | 82 +++++++++++++++++++++++
src/test/regress/sql/timestamptz.sql | 8 +++
6 files changed, 220 insertions(+), 10 deletions(-)
diff --git a/doc/src/sgml/func.sgml b/doc/src/sgml/func.sgml
index 16ed17b118a..c7c0f23c8fa 100644
--- a/doc/src/sgml/func.sgml
+++ b/doc/src/sgml/func.sgml
@@ -1,5 +1,5 @@
<!--
-$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.183 2003/12/18 03:59:07 momjian Exp $
+$PostgreSQL: pgsql/doc/src/sgml/func.sgml,v 1.184 2003/12/25 03:36:23 momjian Exp $
PostgreSQL documentation
-->
@@ -3983,6 +3983,22 @@ substring('foobar' from 'o(.)b') <lineannotation>o</lineannotation>
<entry><literal>Y</literal></entry>
<entry>last digit of year</entry>
</row>
+ <row>
+ <entry><literal>IYYY</literal></entry>
+ <entry>ISO year (4 and more digits)</entry>
+ </row>
+ <row>
+ <entry><literal>IYY</literal></entry>
+ <entry>last 3 digits of ISO year</entry>
+ </row>
+ <row>
+ <entry><literal>IY</literal></entry>
+ <entry>last 2 digits of ISO year</entry>
+ </row>
+ <row>
+ <entry><literal>I</literal></entry>
+ <entry>last digits of ISO year</entry>
+ </row>
<row>
<entry><literal>BC</literal> or <literal>B.C.</literal> or
<literal>AD</literal> or <literal>A.D.</literal></entry>
diff --git a/src/backend/utils/adt/formatting.c b/src/backend/utils/adt/formatting.c
index 0f5487dbb77..d808ac90e25 100644
--- a/src/backend/utils/adt/formatting.c
+++ b/src/backend/utils/adt/formatting.c
@@ -1,7 +1,7 @@
/* -----------------------------------------------------------------------
* formatting.c
*
- * $PostgreSQL: pgsql/src/backend/utils/adt/formatting.c,v 1.70 2003/11/29 19:51:58 pgsql Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/formatting.c,v 1.71 2003/12/25 03:36:23 momjian Exp $
*
*
* Portions Copyright (c) 1999-2003, PostgreSQL Global Development Group
@@ -525,6 +525,10 @@ typedef enum
DCH_HH12,
DCH_HH,
DCH_IW,
+ DCH_IYYY,
+ DCH_IYY,
+ DCH_IY,
+ DCH_I,
DCH_J,
DCH_MI,
DCH_MM,
@@ -565,6 +569,10 @@ typedef enum
DCH_hh12,
DCH_hh,
DCH_iw,
+ DCH_iyyy,
+ DCH_iyy,
+ DCH_iy,
+ DCH_i,
DCH_j,
DCH_mi,
DCH_mm,
@@ -659,6 +667,10 @@ static KeyWord DCH_keywords[] = {
{"HH12", 4, dch_time, DCH_HH12, TRUE},
{"HH", 2, dch_time, DCH_HH, TRUE},
{"IW", 2, dch_date, DCH_IW, TRUE}, /* I */
+ {"IYYY", 4, dch_date, DCH_IYYY, TRUE},
+ {"IYY", 3, dch_date, DCH_IYY, TRUE},
+ {"IY", 2, dch_date, DCH_IY, TRUE},
+ {"I", 1, dch_date, DCH_I, TRUE},
{"J", 1, dch_date, DCH_J, TRUE}, /* J */
{"MI", 2, dch_time, DCH_MI, TRUE},
{"MM", 2, dch_date, DCH_MM, TRUE},
@@ -699,6 +711,10 @@ static KeyWord DCH_keywords[] = {
{"hh12", 4, dch_time, DCH_HH12, TRUE},
{"hh", 2, dch_time, DCH_HH, TRUE},
{"iw", 2, dch_date, DCH_IW, TRUE}, /* i */
+ {"iyyy", 4, dch_date, DCH_IYYY, TRUE},
+ {"iyy", 3, dch_date, DCH_IYY, TRUE},
+ {"iy", 2, dch_date, DCH_IY, TRUE},
+ {"i", 1, dch_date, DCH_I, TRUE},
{"j", 1, dch_time, DCH_J, TRUE}, /* j */
{"mi", 2, dch_time, DCH_MI, TRUE}, /* m */
{"mm", 2, dch_date, DCH_MM, TRUE},
@@ -2447,12 +2463,26 @@ dch_date(int arg, char *inout, int suf, int flag, FormatNode *node, void *data)
}
break;
case DCH_YYYY:
+ case DCH_IYYY:
if (flag == TO_CHAR)
{
if (tm->tm_year <= 9999 && tm->tm_year >= -9998)
- sprintf(inout, "%0*d", S_FM(suf) ? 0 : 4, YEAR_ABS(tm->tm_year));
+ sprintf(inout, "%0*d",
+ S_FM(suf) ? 0 : 4,
+ arg == DCH_YYYY ?
+ YEAR_ABS(tm->tm_year) :
+ YEAR_ABS(date2isoyear(
+ tm->tm_year,
+ tm->tm_mon,
+ tm->tm_mday)));
else
- sprintf(inout, "%d", YEAR_ABS(tm->tm_year));
+ sprintf(inout, "%d",
+ arg == DCH_YYYY ?
+ YEAR_ABS(tm->tm_year) :
+ YEAR_ABS(date2isoyear(
+ tm->tm_year,
+ tm->tm_mon,
+ tm->tm_mday)));
if (S_THth(suf))
str_numth(p_inout, inout, S_TH_TYPE(suf));
return strlen(p_inout) - 1;
@@ -2472,9 +2502,14 @@ dch_date(int arg, char *inout, int suf, int flag, FormatNode *node, void *data)
}
break;
case DCH_YYY:
+ case DCH_IYY:
if (flag == TO_CHAR)
{
- snprintf(buff, sizeof(buff), "%03d", YEAR_ABS(tm->tm_year));
+ snprintf(buff, sizeof(buff), "%03d",
+ arg == DCH_YYY ?
+ YEAR_ABS(tm->tm_year) :
+ YEAR_ABS(date2isoyear(tm->tm_year,
+ tm->tm_mon, tm->tm_mday)));
i = strlen(buff);
strcpy(inout, buff + (i - 3));
if (S_THth(suf))
@@ -2502,9 +2537,14 @@ dch_date(int arg, char *inout, int suf, int flag, FormatNode *node, void *data)
}
break;
case DCH_YY:
+ case DCH_IY:
if (flag == TO_CHAR)
{
- snprintf(buff, sizeof(buff), "%02d", YEAR_ABS(tm->tm_year));
+ snprintf(buff, sizeof(buff), "%02d",
+ arg == DCH_YY ?
+ YEAR_ABS(tm->tm_year) :
+ YEAR_ABS(date2isoyear(tm->tm_year,
+ tm->tm_mon, tm->tm_mday)));
i = strlen(buff);
strcpy(inout, buff + (i - 2));
if (S_THth(suf))
@@ -2532,9 +2572,14 @@ dch_date(int arg, char *inout, int suf, int flag, FormatNode *node, void *data)
}
break;
case DCH_Y:
+ case DCH_I:
if (flag == TO_CHAR)
{
- snprintf(buff, sizeof(buff), "%1d", YEAR_ABS(tm->tm_year));
+ snprintf(buff, sizeof(buff), "%1d",
+ arg == DCH_Y ?
+ YEAR_ABS(tm->tm_year) :
+ YEAR_ABS(date2isoyear(tm->tm_year,
+ tm->tm_mon, tm->tm_mday)));
i = strlen(buff);
strcpy(inout, buff + (i - 1));
if (S_THth(suf))
diff --git a/src/backend/utils/adt/timestamp.c b/src/backend/utils/adt/timestamp.c
index 5cd5b92f597..7aab2455a26 100644
--- a/src/backend/utils/adt/timestamp.c
+++ b/src/backend/utils/adt/timestamp.c
@@ -8,7 +8,7 @@
*
*
* IDENTIFICATION
- * $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.97 2003/11/29 19:51:59 pgsql Exp $
+ * $PostgreSQL: pgsql/src/backend/utils/adt/timestamp.c,v 1.98 2003/12/25 03:36:23 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -2840,7 +2840,7 @@ interval_trunc(PG_FUNCTION_ARGS)
/* isoweek2date()
* Convert ISO week of year number to date.
- * The year field must be specified!
+ * The year field must be specified with the ISO year!
* karel 2000/08/07
*/
void
@@ -2920,6 +2920,64 @@ date2isoweek(int year, int mon, int mday)
}
+/* date2isoyear()
+ *
+ * Returns ISO 8601 year number.
+ */
+int
+date2isoyear(int year, int mon, int mday)
+{
+ float8 result;
+ int day0,
+ day4,
+ dayn;
+
+ /* current day */
+ dayn = date2j(year, mon, mday);
+
+ /* fourth day of current year */
+ day4 = date2j(year, 1, 4);
+
+ /* day0 == offset to first day of week (Monday) */
+ day0 = j2day(day4 - 1);
+
+ /*
+ * We need the first week containing a Thursday, otherwise this day
+ * falls into the previous year for purposes of counting weeks
+ */
+ if (dayn < (day4 - day0))
+ {
+ day4 = date2j(year - 1, 1, 4);
+
+ /* day0 == offset to first day of week (Monday) */
+ day0 = j2day(day4 - 1);
+
+ year--;
+ }
+
+ result = (((dayn - (day4 - day0)) / 7) + 1);
+
+ /*
+ * Sometimes the last few days in a year will fall into the first week
+ * of the next year, so check for this.
+ */
+ if (result >= 53)
+ {
+ day4 = date2j(year + 1, 1, 4);
+
+ /* day0 == offset to first day of week (Monday) */
+ day0 = j2day(day4 - 1);
+
+ if (dayn >= (day4 - day0))
+ {
+ year++;
+ }
+ }
+
+ return year;
+}
+
+
/* timestamp_part()
* Extract specified field from timestamp.
*/
diff --git a/src/include/utils/timestamp.h b/src/include/utils/timestamp.h
index 2e20298a77b..d70a6f1833f 100644
--- a/src/include/utils/timestamp.h
+++ b/src/include/utils/timestamp.h
@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
- * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.32 2003/11/29 22:41:16 pgsql Exp $
+ * $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.33 2003/12/25 03:36:24 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -248,5 +248,6 @@ extern void GetEpochTime(struct tm * tm);
extern void isoweek2date(int woy, int *year, int *mon, int *mday);
extern int date2isoweek(int year, int mon, int mday);
+extern int date2isoyear(int year, int mon, int mday);
#endif /* TIMESTAMP_H */
diff --git a/src/test/regress/expected/timestamptz.out b/src/test/regress/expected/timestamptz.out
index 3453c49d775..a76e09a0f54 100644
--- a/src/test/regress/expected/timestamptz.out
+++ b/src/test/regress/expected/timestamptz.out
@@ -1317,6 +1317,76 @@ SELECT '' AS to_char_9, to_char(d1, 'YYYY A.D. YYYY a.d. YYYY bc HH:MI:SS P.M. H
| 2001 A.D. 2001 a.d. 2001 ad 05:32:01 P.M. 05:32:01 p.m. 05:32:01 pm
(64 rows)
+SELECT '' AS to_char_10, to_char(d1, 'YYYY WW IYYY IYY IY I IW')
+ FROM TIMESTAMPTZ_TBL;
+ to_char_10 | to_char
+------------+--------------------------
+ |
+ |
+ | 1969 53 1970 970 70 0 01
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 01 1997 997 97 7 01
+ | 1997 01 1997 997 97 7 01
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 23 1997 997 97 7 24
+ | 2001 38 2001 001 01 1 38
+ | 2000 11 2000 000 00 0 11
+ | 2000 11 2000 000 00 0 11
+ | 2000 11 2000 000 00 0 11
+ | 2000 11 2000 000 00 0 11
+ | 2000 11 2000 000 00 0 11
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 23 1997 997 97 7 24
+ | 1997 06 1997 997 97 7 07
+ | 1997 06 1997 997 97 7 07
+ | 1997 07 1997 997 97 7 07
+ | 1997 07 1997 997 97 7 07
+ | 1997 07 1997 997 97 7 07
+ | 1997 07 1997 997 97 7 07
+ | 1997 07 1997 997 97 7 07
+ | 0097 07 0097 097 97 7 07
+ | 0097 07 0097 097 97 7 07
+ | 0597 07 0597 597 97 7 07
+ | 1097 07 1097 097 97 7 07
+ | 1697 07 1697 697 97 7 07
+ | 1797 07 1797 797 97 7 07
+ | 1897 07 1897 897 97 7 07
+ | 1997 07 1997 997 97 7 07
+ | 2097 07 2097 097 97 7 07
+ | 1996 09 1996 996 96 6 09
+ | 1996 09 1996 996 96 6 09
+ | 1996 09 1996 996 96 6 09
+ | 1996 53 1997 997 97 7 01
+ | 1996 53 1997 997 97 7 01
+ | 1997 01 1997 997 97 7 01
+ | 1997 09 1997 997 97 7 09
+ | 1997 09 1997 997 97 7 09
+ | 1997 52 1998 998 98 8 01
+ | 1997 53 1998 998 98 8 01
+ | 1999 53 1999 999 99 9 52
+ | 2000 01 1999 999 99 9 52
+ | 2000 53 2000 000 00 0 52
+ | 2001 01 2001 001 01 1 01
+(64 rows)
+
-- TO_TIMESTAMP()
SELECT '' AS to_timestamp_1, to_timestamp('0097/Feb/16 --> 08:14:30', 'YYYY/Mon/DD --> HH:MI:SS');
to_timestamp_1 | to_timestamp
@@ -1402,4 +1472,16 @@ SELECT '' AS to_timestamp_14, to_timestamp('995-1116', 'YYY-MMDD');
| Thu Nov 16 00:00:00 1995 PST
(1 row)
+SELECT '' AS to_timestamp_15, to_timestamp('200401', 'IYYYIW');
+ to_timestamp_15 | to_timestamp
+-----------------+------------------------------
+ | Mon Dec 29 00:00:00 2003 PST
+(1 row)
+
+SELECT '' AS to_timestamp_16, to_timestamp('200401', 'YYYYWW');
+ to_timestamp_16 | to_timestamp
+-----------------+------------------------------
+ | Thu Jan 01 00:00:00 2004 PST
+(1 row)
+
SET DateStyle TO DEFAULT;
diff --git a/src/test/regress/sql/timestamptz.sql b/src/test/regress/sql/timestamptz.sql
index 71414f198e1..2a789b87bd2 100644
--- a/src/test/regress/sql/timestamptz.sql
+++ b/src/test/regress/sql/timestamptz.sql
@@ -189,6 +189,9 @@ SELECT '' AS to_char_8, to_char(d1, 'YYYYTH YYYYth Jth')
SELECT '' AS to_char_9, to_char(d1, 'YYYY A.D. YYYY a.d. YYYY bc HH:MI:SS P.M. HH:MI:SS p.m. HH:MI:SS pm')
FROM TIMESTAMPTZ_TBL;
+SELECT '' AS to_char_10, to_char(d1, 'YYYY WW IYYY IYY IY I IW')
+ FROM TIMESTAMPTZ_TBL;
+
-- TO_TIMESTAMP()
SELECT '' AS to_timestamp_1, to_timestamp('0097/Feb/16 --> 08:14:30', 'YYYY/Mon/DD --> HH:MI:SS');
@@ -220,4 +223,9 @@ SELECT '' AS to_timestamp_13, to_timestamp('95-1116', 'YY-MMDD');
SELECT '' AS to_timestamp_14, to_timestamp('995-1116', 'YYY-MMDD');
+SELECT '' AS to_timestamp_15, to_timestamp('200401', 'IYYYIW');
+
+SELECT '' AS to_timestamp_16, to_timestamp('200401', 'YYYYWW');
+
+
SET DateStyle TO DEFAULT;
--
GitLab