RE: Select from [file with multiple record formats]

[Vernon Hamberg <vhamberg@xxxxxxxxx>]

There is no way Bob's solution will work, if this is a multiple-format
logical. Unless the message I got can be circumvented.

If it's a flat file (old 36 variety?), then his answer is great.

AFAIK.

:-(

Vern

At 04:12 PM 3/14/02 -0800, you wrote:
>Yeah, I think I might just stick to Bob's solution.  I'm more familiar and
>comfortable with that one, but I'd definitely welcome some nuances.  :)
>
> >>> vhamberg@attbi.com 03/14/02 04:04PM >>>
>SQL message:
>
> >Message ID . . . . . . :   SQL7003       Severity . . . . . . . :   30
> >Message type . . . . . :   Diagnostic
> >
> >Message . . . . :   File XCJTALL in XCBA has more than one format.
> >Cause . . . . . :   SQL cannot process a file unless it has only one format.
>
>Funny thing, though - I was allowed to create an alias for this
>multiple-format logical. Still could not use it, however.
>
>Updates would be to the physical, probably using some branching code,
>dependent on the format just retrieved.
>
>At 06:24 PM 3/14/02 -0500, you wrote:
> >Ted Barry wrote:
> >
> > >I've never had to deal with this one
> > >until now...  Is it possible to select
> > >and/or even update a file with multiple
> > >record formats?
> >
> >Maybe.  If you have packed numbers to update it gets harder - you'd probably
> >have to write your own UDFs.  Anyway, treat the record as a giant character
> >string and "select" based on a substring.  If your header records all have a
> >"1" in column 123 then you can select the headers with
> >
> >select * from flatfile where substr(flatfile, 123, 1) = '1'
> >
> >You update the same way.  Let's say you need to change that "1" to a "A"
> >
> >update flatfile set flatfile = substr(flatfile,1,122)
> >        concat "A" concat substr(flatfile,124,length_of_rest_of_record)
> >        where substr(flatfile,123,1)='1'
> >
> >Conceptually, you're building an entire new flat record composed of the
> >first part of the record concatenated with the changed columns concatenated
> >with the last part of the record.
> >
> >I only do this in extreme cases, like being on a system without a compiler.
> >   --buck
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