Обсуждение: pgsql: Add comments about why errno is set to zero.

Log Message:
-----------
Add comments about why errno is set to zero.

Modified Files:
--------------
    pgsql/src/backend/utils/adt:
        datetime.c (r1.162 -> r1.163)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/datetime.c.diff?r1=1.162&r2=1.163)
        float.c (r1.116 -> r1.117)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/utils/adt/float.c.diff?r1=1.116&r2=1.117)

momjian@postgresql.org (Bruce Momjian) writes:
> Log Message:
> -----------
> Add comments about why errno is set to zero.

These comments seem a bit wrongheaded, since "checking
LONG_MIN/LONG_MAX" is exactly not what we could do to detect an overflow
error.

            regards, tom lane