Entrypoint firstdaynextmonth compatible with UTF-8
Input TIMESTAMP date optionally time Output TIMESTAMP date of 1st day of next month as date with time 00:00:00
TestSQL SELECT '01.06.2009' AS ISCORRECT, F_FIRSTDAYNEXTMONTH('08.05.2009 15:00:00') FROM RDB$DATABASE; SELECT '01.01.2010' AS ISCORRECT, F_FIRSTDAYNEXTMONTH('08.12.2009 15:00:00') FROM RDB$DATABASE;