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  2. RPG400-L
  3. November 2010

Re: RPG SQL and Cursors

Probably most shops are this way, and it is hard to get away from in an existing databse, but you can get essentially the same level of independence with RLA as you can using SQL. Instead of reading the physical, use LFs and explicitly specify the fields in the LF. You can then change the underlying physical and no program need to be recompiled.

However, I personally find explicit field specification in SQL (SELECT fieldname, fieldname, as opposed to SELECT *) to be easier.

Sam

On 11/18/2010 6:32 PM, Alan Campin wrote:

When you use RLA, unless you externalize your I/O somehow (which almost no
one know how to do and won't use it even if you did), you are bringing the
entire record into the program which in effect, locks the table to change.

That means the next time you need to change the table you have to recompile
every program that uses it and very quickly no wants to recompile 500
programs so they start creating extension tables or reusing fields or god
knows what.


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