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  2. RPG400-L
  3. January 2008

Re: Date Format prior to 1940

Tom wrote:
rob wrote:

*CYMD is for all those people who still insisted on storing their dates as numeric and decided that 7 packed digits would take up less space than 8 packed digits (1250901 versus 20250901). Of course, 7 packed digits still take up 4 bytes, which is the same size as a true date field takes.

I would have thought that *CYMD was primarily for support of date parameters from *CMDs where the CPP was written in RPG. I wouldn't have expected that it would be used often for persistent storage.

There are several packages that use *CYMD. Cool:2E (formerly known as Synon) used that format too. The packages and Synon predate the advent of true date data types.

Date fields aren't perfect, in particular the validity checking is unusual for RPG programmers.
--buck

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