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From "Jukka Zitting" <jukka.zitt...@gmail.com>
Subject Re: Fully SQL compliant
Date Fri, 30 May 2008 08:11:52 GMT

On Fri, May 30, 2008 at 4:47 AM, MARTINEZ Antonio
<Antonio.Martinez@alcatel-lucent.com> wrote:
> - Is JCR170, or the extensions provided in JackRabbit 1.4 fully SQL
> compliant ?

No, JSR 170 specifies a relatively tight SQL subset (for example no
joins) and Jackrabbit only extends that subset a bit.

> - Is there a performance difference between the two query query
> languages ?

No. Both XPath and SQL are parsed into an abstract in-memory query
tree that the underlying query engine uses. The performance of
equivalent XPath and SQL queries is thus practically the same.


Jukka Zitting

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