* to_char:

- full support for IW (ISO week) and vice versa conversion for IW too
    (the to_char 'week' support is now complete and I hope correct).

  Thomas, I use for IW code from timestamp.c, for this I create separate
  function date2isoweek() from original 'case DTK_WEEK:' code in the
  timestamp_part(). I mean will better use one code for same feature in
  date_part() and in to_char(). The isoweek2date() is added to timestamp.c
  too. Right?

  IMHO in 7.1 will all to_char's features complete. It is cca 41 templates
  for date/time and cca 21 for numbers.

 * to_ascii:

   - gcc, is it correct now? :-)


  In the patch is documentation for to_char's IW and for to_ascii().

                                                        Karel

src/include/utils/timestamp.h

@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2000, PostgreSQL, Inc
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $Id: timestamp.h,v 1.9 2000/07/17 03:05:32 tgl Exp $
+ * $Id: timestamp.h,v 1.10 2000/08/29 04:41:48 momjian Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -190,4 +190,7 @@ extern int	timestamp2tm(Timestamp dt, int *tzp, struct tm * tm,
 
 extern Timestamp SetTimestamp(Timestamp timestamp);
 
+extern void	isoweek2date( int woy, int *year, int *mon, int *mday);
+extern int	date2isoweek(int year, int mon, int mday);
+
 #endif	 /* TIMESTAMP_H */