Re: FMTSRC

"Dennis Lovelady" <dennis@lovelady.com> wrote:

>>Greater than 19 (not 20)
>>and greater than 99.
>
>Different columns are being compared.  It's cool.  :^)

Sorry, Dennis, I'm not with you. How can any valid year have a century part
greater than "19" and a year part greater than "99"? No records will pass.
Assume our comparison date is CCYY.

To test equal:  Century=CC AND Year=YY
To test greater than:  Century>CC OR (Century=CC AND Year>YY)
To test less than:  Century<CC OR (Century=CC AND Year<YY)

This should work for any date including the edge cases 1999 and 2000.
Health warning - the following code has not been tested - that's Booth's
problem.  :-)

= 1999
   I C    117 118 EQC19
   IAC    54  55 EQC99

=2000
   I C    117 118 EQC20
   IAC    54  55 EQC00

>1999
   I C    117 118 GTC19
   I C    117 118 EQC19
   IAC    54  55 GTC99

>2000
   I C    117 118 GTC20
   I C    117 118 EQC20
   IAC    54  55 GTC00

<1999
   I C    117 118 LTC19
   I C    117 118 EQC19
   IAC    54  55 LTC99

<2000
   I C    117 118 LTC20
   I C    117 118 EQC20
   IAC    54  55 LTC00

You can also do the comparisons perfectly well if you are using date
windowing with no explicit century, but then it really gets interesting.
Answers on a postcard, please.

Dave Kahn, ABB Steward Ltd.


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