• Subject: Re: Fastest string scan
  • From: "Joe Teff" <jteff19@xxxxxxx>
  • Date: Thu, 18 Sep 1997 21:50:58 -0500

> Thanks, for the suggestion but is opnqryf a good option for an
> interactive program? also i would have to call a CL program to do the
> selection and get back to the RPG, do a close and an open of the file to
> use the new query. I'm not sure than that would be faster. The SQL part
> I dontr know (we dont have SQL on our machines)

Creating and index file of all words will work, though check for duplicate 
entries if you do it that way (the same "word" can appear in the same record 
more than once). You do not have to leave the RPG to do the OPNQRYF either. 
Just code your OVRDBF, OPNQRYF, CLOF and DLTOVR commands in the RPG and execute 
them with QEXCCMD. With the new syntax of RPG/ILE, building OPNQRYF commands 
has never been easier. Using an index file will perform best regardless of the 
size of the file, but uses disk to store the indexes and requires that you keep 
it up-to-date (sounds like a good use for a trigger). The OPNQRYF command takes 
time to complete but does not require additional "index" space and update pgm.

Joe Teff
QDS
Bloomington, MN
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