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From Benedict Elliott Smith <>
Subject Re: Conditional Update Code?
Date Fri, 06 Feb 2015 14:50:37 GMT
It's quite possible support could be added to evaluate a UDF as part of the
condition check. The code you're looking for are implementors of
CASRequest.appliesTo(), in CQL3CasRequest and

It seems like would
offer the basic functionality, except that it is expected to require ALLOW
FILTERING, which is unlikely to be permitted for a CAS operation, since the
implication is that the work is too expensive for normal use. Such a
constraint is probably not necessary if a clustering prefix is provided,
though (i.e. a full CQL row key).

On Fri, Feb 6, 2015 at 2:38 PM, Brian O'Neill <> wrote:

> All,
> I¹m just looking for a little directionŠ
> Anyone know where I can find the code that checks the condition in a
> conditional update?
> We¹d love to have more expressive conditions, beyond just equality.  (e.g.
> column contains? value)
> I wanted to see how hard this would be to contribute.
> Is such a JIRA already open?
> -brian
> ---
> Brian O'Neill
> Chief Technology Officer
> Health Market Science, a LexisNexis Company
> 215.588.6024 Mobile € @boneill42 <>
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