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My understanding is that Java is used by SQL under the covers for many things (more than the Db2 guys would like in some cases) - I believe all of the XML/JSON/Web services are in this category.

But I'd be shocked if it did Regex that way.


Jon Paris

www.partner400.com
www.SystemiDeveloper.com

On May 30, 2019, at 10:17 AM, David Gibbs via RPG400-L <rpg400-l@xxxxxxxxxxxxxxxxxx> wrote:

On 5/30/19 8:38 AM, Mark Murphy wrote:
Why do you think SQL relies on Java stack to parse regular expressions? It requires the International Components for Unicode, which has both Java and C
interfaces. Since DB2 uses C in most places, I would expect it to use C for
ICU components as well. Is there a place that tells us it uses the Java interface?

I concur with this ... I recently started using the SQL regex functions for
string analysis & manipulation... if it was invoking Java functionality, I would
have noticed the JVM startup penalty.

When invoked from a SQL RPG program, it's very fast.

david

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