pgsql/src backend/utils/adt/datetime.c backend ...

CVSROOT:    /home/projects/pgsql/cvsroot
Module name:    pgsql
Changes by:    thomas@hub.org    01/01/18 02:22:43

Modified files:
    src/backend/utils/adt: datetime.c formatting.c nabstime.c
                           timestamp.c
    src/include/utils: datetime.h
    src/test/regress/expected: interval.out

Log message:
    Fix up "Postgres-style" time interval representation when fields have
    mixed-signs. Previous effort left way too many minus signs, and was at
    least as broken as the one before that :(
    Clean up "ISO-style" time interval representation to omit zero fields if
    there is at least one non-zero field. Supress some leading plus signs
    when not necessary for clarity.
    Replace every #ifdef __CYGWIN__ block with a cleaner TIMEZONE_GLOBAL macro
    defined in datetime.h.