• Subject: Re: PF File Definition questions...
  • From: "R. Bruce Hoffman, Jr." <rbruceh@xxxxxxx>
  • Date: Fri, 15 Oct 1999 15:15:08 -0400

Ok, now I HAVE to disagree.


-----Original Message-----
From: Al Barsa, Jr. <barsa2@ibm.net>
To: MIDRANGE-L@midrange.com <MIDRANGE-L@midrange.com>
Date: Friday, October 15, 1999 2:33 PM
Subject: Re: PF File Definition questions...


>Most folks define PFs with keys, as this makes them easier to use.  SQL
>defines "tables" (PFs) without keys, and only defines "views" (LFs) with
>keys.  SQL is the industry standard for the definition of database files,
>which IMHO is inferior to DDS.
>

Not true. You have the option, just like in DDS, of creating a table with or
without the primary key. The key, when specified for the table, is part of
the physical file, just as if it was described by DDS.

CREATE TABLE collection.table (field1 char(10) primary key, field2 char(10))

This statement will create ONLY a physical file with a unique keyed access
path as part of the physical file, not as a separate logical file.

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