By: TomLiotta

TomLiotta — Wed, 30 Jan 2013 11:24:26 +0000

If you are going to ‘Position to’, you should read from a dataset that is sequenced by the ‘Position to’ value. If you can’t do that, then you can read all of the data into your program and sort it.

The data values will be in the same file if you create a JOIN file that join the physical files into one or more logical files. You can create multiple DDS logical files that are indexed by different fields. You can generate a logical file at run-time with OPNQRYF. Or best might be to use dynamic SQL to generate a JOIN view in your program.

With SQL, you can modify the SELECT statement for a CURSOR by adding an ORDER BY clause when the user picks a different ‘Position to’ field. The underlying tables should have indexes that support the various possible ORDER BY conditions.

You can use a blocked FETCH to read blocks that have the same number of rows as your subfile page. If you only care about scrolling the subfile forward from the ‘Position to’ value, a WHERE clause can be added to the SELECT statement.

It doesn’t matter if account and description come from the same physical file. You have to read the file that the ‘Position to’ value is from. Easiest way to do that is to get the fields into the same JOIN logical file or view.

Tom

By: RamvishakRamesh

RamvishakRamesh — Wed, 30 Jan 2013 05:56:25 +0000

But here the problem is am not getting account and description from the same file. I cannot use the file which has the desription to build the subfile because it has many other fields also whihc comes only from the file which has account.

Comments on: Single page subfile with filter

By: TomLiotta

By: RamvishakRamesh