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A stored procedure cannot be used in a SELECT - that is where a UDF shines. A UDF can be implemented with a service program - so you could have the same service program for both a UDF and for CALLP in your RPG/LE programs.
The other possibilitiy is using the SQL SET or VALUES statement in RPG to execute a UDF and have the result put into a local host variable.
Oh - be sure to use VARCHAR in the CREATE FUNCTION or CREATE PROCEDURE statement - this will let you use constants instead of field names in your call of either, because literals are converted to variable length values by SQL. Also, declare you incoming parameters as VARYING.
HTH Vern At 03:38 PM 12/15/2006, you wrote:
(Cross-posted to midrange-l and rpg400-l) Our legacy database files are littered with dates defined as four numeric fields, with a 2-digit century, 2-digit year, month, and day. I must work with these dates in SQL and WrkQry, sometimes in RPG. I would like to define either a UDF or stored procedure or *something* that would convert four input parameters into a date result. It would be nice if I could use the same function in an SQL statement and in RPG code, but not a requirement. So, I need to read up on how to do this, and how to choose UDF vs. stored procedure. I searched the archives, saw a few examples of code, but did not see any reference on how to call the UDF or stored procedure. Can anyone suggest good online references? TIA, Dan -- This is the Midrange Systems Technical Discussion (MIDRANGE-L) mailing list To post a message email: MIDRANGE-L@xxxxxxxxxxxx To subscribe, unsubscribe, or change list options, visit: http://lists.midrange.com/mailman/listinfo/midrange-l or email: MIDRANGE-L-request@xxxxxxxxxxxx Before posting, please take a moment to review the archives at http://archive.midrange.com/midrange-l.
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