Re: Keyed Array Data Structure %LOOKUPLT

Thanks for that!

The compiler message was telling me that I needed my array to be
explicitly defined with ASCEND or DESCEND.

Reading through the docs on the LOOKUPxx operation, it doesn't say you
can't do LOOKUPXX, but it doesn't say you can either!
Then I noticed all the examples with a subfield as the search element used
LOOKUP only.
Silly me.

date: Fri, 30 Apr 2021 12:56:04 -0400
from: Jon Paris <jon.paris@xxxxxxxxxxxxxx>
subject: Re: Keyed Array Data Structure %LOOKUPLT

You can't do what you are trying to do with %LookUpXX

For DS arrays, only %LOOKUP is allowed. The variants (LT, etc.) are not
supported in part because there is no way to designate the sequence of the
keyed field.

You can sort based on any subfield, but not search. Given that you have
such a small array perhaps a simple search loop will do the job for you.


Jon Paris

On Apr 30, 2021, at 7:27 AM, Dave <dfx1@xxxxxxxxxxxxxx> wrote:

Hi,

I have this lookup problem. Can't believe it.
IBM reference says : A "Keyed Array Data Structure" is an array data
structure with one subfield
identified as the search or sort key.

I don't see how to identify one subfield as the search or sort key or

where

this is explained.

This compiles :
$I = %LOOKUP ( myDate : myArray(*).DATE )

This doesn't
$I = %LOOKUPLT ( myDate : myArray(*).DATE )

My Array DS :

D myArray DS DIM(10) QUALIFIED
D CODE LIKE(refcode)
D DATE LIKE(refdate)

Thanks