Oracle-L: Re: Do triggers cause a context switch between SQL & PL/SQL

From: Jonathan Lewis <jonathan_at_jlcomp.demon.co.uk>
Date: Fri, 04 Apr 2003 14:14:19 -0800
Message-ID: <F001.0057AF9F.20030404141419@fatcity.com>

But that's begging the question.
What actually occurs that allows you to
say that there is a "context switch" ?

I know that one of the advertised performance enhancements in v9 was the 'more efficient context switching between SQL and PL/SQL' (or some such thing) - but a name is not a thing.

Does the Oracle process run as a virtual machine, and build two completely independent top-level heaps/stacks and maintain a set of virtual registers - one for an SQL environment and one for a PL/SQL environment ? Do you get multiple "contexts" if SQL calls a pl/sql function that opens a cursor that calls a pl/sql function ?

Can anyone put a description under the name ?

Regards

Jonathan Lewis
http://www.jlcomp.demon.co.uk

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Original Message ----- To: "Multiple recipients of list ORACLE-L" <ORACLE-L_at_fatcity.com> Sent: 04 April 2003 21:58

> Jonathan
>
> it is switching from SQL context to PL/SQL context and vice versa.
>
> Raj
> --------------------------------------------------------------------

> ----
> Rajendra dot Jamadagni at nospamespn dot com
> All Views expressed in this email are strictly personal.
> QOTD: Any clod can have facts, having an opinion is an art !
>

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Author: Jonathan Lewis
  INET: jonathan_at_jlcomp.demon.co.uk

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Received on Fri Apr 04 2003 - 16:14:19 CST