× The internal search function is temporarily non-functional. The current search engine is no longer viable and we are researching alternatives.
As a stop gap measure, we are using Google's custom search engine service.
If you know of an easy to use, open source, search engine ... please contact support@midrange.com.


  1.  Home
  2. RPG400-L
  3. November 2015

Re: Embedded RPG and the WHERE LIKE

I think the index has to have the same sort sequence in order for it to be used.

And so far as I know, for the LIKE predicate, only those with trailing wildcard can take advantage of the index. If a leading wildcard, it is almost certainly going to use a table scan.

On 11/16/2015 12:56 PM, Mike Jones wrote:
Hi Booth,

Between Birgitta and Peter, they've got your answers covered.

To get reasonable performance, you'll definitely want an index present over
columns searched over using LIKE, to ensure an Index Probe takes place
instead of a full Table Scan.

Mike


As an Amazon Associate we earn from qualifying purchases.

This thread ...
Replies:
Follow On AppleNews
Return to Archive home page | Return to MIDRANGE.COM home page

This mailing list archive is Copyright 1997-2024 by midrange.com and David Gibbs as a compilation work. Use of the archive is restricted to research of a business or technical nature. Any other uses are prohibited. Full details are available on our policy page. If you have questions about this, please contact [javascript protected email address].

Operating expenses for this site are earned using the Amazon Associate program and Google Adsense.