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Add two new format fields for use with to_char(), to_date() and

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to_timestamp():
    - ID for day-of-week
    - IDDD for day-of-year

This makes it possible to convert ISO week dates to and from text
fully represented in either week ('IYYY-IW-ID') or day-of-year
('IYYY-IDDD') format.

I have also added an 'isoyear' field for use with extract / date_part.

Brendan Jurd
This commit is contained in:
Bruce Momjian
2007-02-16 03:39:46 +00:00
parent c7b08050d9
commit 4ebb0cf9c3
12 changed files with 779 additions and 157 deletions
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7
src/include/utils/timestamp.h
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@@ -6,7 +6,7 @@
* Portions Copyright (c) 1996-2007, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.66 2007/01/05 22:19:59 momjian Exp $
* $PostgreSQL: pgsql/src/include/utils/timestamp.h,v 1.67 2007/02/16 03:39:45 momjian Exp $
*
*-------------------------------------------------------------------------
*/
@@ -331,8 +331,11 @@ extern int timestamp_cmp_internal(Timestamp dt1, Timestamp dt2);
/* timestamp comparison works for timestamptz also */
#define timestamptz_cmp_internal(dt1,dt2) timestamp_cmp_internal(dt1, dt2)
extern void isoweek2date(int woy, int *year, int *mon, int *mday);
extern int isoweek2j(int year, int week);
extern void isoweek2date(int woy, int *year, int *mon, int *mday);
extern void isoweekdate2date(int isoweek, int isowday, int *year, int *mon, int *mday);
extern int date2isoweek(int year, int mon, int mday);
extern int date2isoyear(int year, int mon, int mday);
extern int date2isoyearday(int year, int mon, int mday);
#endif /* TIMESTAMP_H */