Sounds like a good idea to me. Might be worth raising an issue on
refactoring the package name so we don't forget to fix it at some point.
Ian
On Tue, 1 Feb 2022, 11:51 Andrea Aime, <andrea.a...@gmail.com> wrote:
> Hi,
> I have a very narrow opportunity to start implementing a CQL2 parser, but
> need to deliver
> some results in a matter of a few days.
>
> CQL2-text has some significant differences compared to CQL and ECQL, a
> quick check shows:
> - spatial and temporal operator names differ
> - identifiers can have column and period inside without requiring quoting
> (in ECQL period is used to refer to nested properties, we won't be able to
> do that anymore)
> - DATE/TIMESTAMP functions working off a string, rather than the string
> directly (e..g, DATE('2020-10-10'))
> - INTERVAL function for date range construction rather than D1/D2
> - ENVELOPE has same syntax but different axis order, used to be
> west/east/north/south (weird!!) now it's
> - CASEI and ACCENTI are new functions to deal with cases insensitive
> comparison, can be used in text comparisons but also in LIKE (where a fixed
> string used to have to be specified)
>
> Given the (very) tight window my plan is to copy over the ECQL parser and
> adapt it in a gt-cql2-text community module,
> and then make the results available for usage in OGC APIs (STAC in
> particular, at least in the next few days).
>
> Longer term, we might decide to merge gt-cql2-text back into gt-cql, but I
> would not go there until "pens are down" on the
> CQL2 standard (seems like we are close though).
>
> Ah, by the way... I'll have to use a weird package name, because for some
> reason, the implementation of CQL (yes, the original CQL)
> lives in a "org.geotools.filter.text.cql2" package... wow that's quite
> confusing!! Seems like it has been like that since
> before we switched to git... oh well... I'll go for
> "org.geotools.filter.text.cql_2" for the time being, if you have a better
> suggestion I'm all ears.
>
> Cheers
> Andrea
>
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