On Thu, Apr 7, 2011 at 5:25 PM, Justin Deoliveira <[email protected]> wrote:
> Hi all,
> Recently a client attempting to upgrade to gs 2.1 RC4 reported an issue with
> cql filter handling. Long story short they are trying to use an attribute
> named "id" (not a primary key) in a simple comparison filter and the ecql
> parser chokes on it. I recall conversation around ecql and the handling of
> attributes named "id" regarding the fact that ecql can do feature ids. But
> can't find much in the docs or in jira.
> I guess the question is this is intended with the switch to ecql? I would
> assume not as it seems a regression. An easy fix would be to mirror ogc
> filter parsing where we fall back onto the old filter parser if the new one
> fails. We could do the same with the ECQL/CQL parsers.
> Thoughts?
There are a few small things that are not backwards compatible, like
using "A eq 5"
or using "id" as an attribute.
For the attribute case afaik you just need to double quote it so that
it does not
get recognized as a keyword, e.g.:
"id" = 5
should work.
I guess doing the fall back might be an option if we want to provide full
backwards compatibility. Don't really see alternatives as ECQL has been
around for long and at some point the fid filter encoding used ID as a keyword:
ID IN ('states.1', 'states.2', ...)
now the syntax is really just
IN('states.1', 'states.2', ...)
Cheers
Andrea
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