Re: Multiple formats in PF or LF

[Dan <dan27649@xxxxxxxxx>]

A PF can have only one record format, but an LF can have multiple record
formats.

Because it's been ages since I last used them, I can only point you to
IBM's DDS for Physical and Logical files Reference.  Search for
"multiple-format logical files in DDS" to find a code sample.

I'm not sure whether SQL can process a multiple format LF.  Hopefully,
others can assist.

- Dan

On Tue, Dec 29, 2020 at 6:37 PM <smith5646midrange@xxxxxxxxx> wrote:

> I'm starting to think that I am searching for something that doesn't
> exist.
>
> I thought there was a way of having a single "flat file" and breaking it
> into multiple record formats in the DDS so the individual records could be
> accessed via SQL
>
> For example: a flat file that would contain sales data
>
> HdrFmt
>                 RcdType
>                 SaleNumber
>                 SaleDate
> DtlFmt
>                 RcdType
>                 SaleNumber
>                 Item
>                 Quantity
>                 Price
> PayFmt
>                 RcdType
>                 SaleNumber
>                 PaymentType
>                 Amount
>
> If I wanted to query all of the detail records to find out what items were
> sold, I could do something like select item, count(*) from flatfile where
> rcdtype = 'DTL' group by item
>
> Am I just thoroughly confused thinking I have seen something like this in
> the past?  If not, can someone please provide the DDS to show me how it is
> done?  Nothing that I have tried has worked.  I know I can create separate
> PFs and copy the appropriate data to each file via a CPYF *NOCHK selecting
> the appropriate rcdtype but that defeats the purpose of what I am trying to
> do.