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F_AGEINWORKINGDAYSTHR

function from adhoc

Entrypoint ageinworkingdaysthr compatible with UTF-8

Inputs/Outputs

   Input     TIMESTAMP     (older) date optionally time 1
             TIMESTAMP     (newer) date optionally time 2
             INTEGER       min. value
             INTEGER       min. value is used (0 = no, 1 = yes)
             INTEGER       max. value
             INTEGER       max. value is used (0 = no, 1 = yes)
             INTEGER       weekday don't calculate
   Output    INTEGER       difference in (integer) days between timestamp 1 and timestamp 2 less of 
                           weekday/s from param 7

Syntax

   weekday: Monday = 1, Tuesday = 2, Wednesday = 3, Thursday = 4, Friday = 5, Saturday = 6, Sunday = 7
   If 1st date is newer than 2nd date, the result is negative.
   Any order of indexes for weekdays. Only allowed indexes are calculated.
   Test SQL
   SELECT 4 AS ISCORRECT, F_AGEINWORKINGDAYSTHRESHOLD('12.12.2008', '17.12.2008', 5, 0, 0, 0, 7) FROM RDB$DATABASE;
   SELECT 5 AS ISCORRECT, F_AGEINWORKINGDAYSTHRESHOLD('12.12.2008', '17.12.2008', 5, 1, 0, 0, 7) FROM RDB$DATABASE;
   SELECT 4 AS ISCORRECT, F_AGEINWORKINGDAYSTHRESHOLD('12.12.2008', '17.12.2008', 0, 0, 3, 0, 7) FROM RDB$DATABASE;
   SELECT 3 AS ISCORRECT, F_AGEINWORKINGDAYSTHRESHOLD('12.12.2008', '17.12.2008', 0, 0, 3, 1, 7) FROM RDB$DATABASE;
   SELECT NULL AS ISCORRECT, F_AGEINWORKINGDAYSTHR(NULL, NULL, NULL) FROM RDB$DATABASE;