Thanks @Michael! Can i assume that
in
the SchemaFactory
#
create(SchemaPlus parentSchema, String name,
...
)
method the root schema is constructed? And can i use the
parentSchema
like this:
ModelHandler.addFunctions(parentSchema, null, ImmutableList.<String>of(),
GeoFunctions.class.getName(), "*", true);
On 28 November 2017 at 16:58, Michael Mior <mm...@uwaterloo.ca> wrote:
> I believe the geospatial functions are not currently registered by default.
> You can see an example of how to do this in CalciteAssert.java. Once you
> have constructed the root schema, the following should be sufficient:
>
> ModelHandler.addFunctions(rootSchema, null, ImmutableList.<String>of(),
> GeoFunctions.class.getName(), "*", true);
>
> --
> Michael Mior
> mm...@apache.org
>
> 2017-11-28 4:27 GMT-05:00 Christian Tzolov <ctzo...@pivotal.io>:
>
> > I've tried to cast the Zip's loc column into double like this:
> >
> > SELECT
> >
> > "city", cast("loc" [0] AS DOUBLE) AS "lon", cast("loc" [1] AS DOUBLE)
> AS
> > "lat"
> >
> > FROM "geode"."Zips"
> >
> > LIMIT 10;
> >
> > This seems to work fine. But when i try to use the ST_Point function i
> > get: "No match found for function signature ST_Point(<NUMERIC>,
> <NUMERIC>)"
> > (full stack is below)
> >
> > It seems like i've not registered a jar dependency or haven't enabled
> > something else?
> >
> >
> > jdbc:calcite:conformance=LENIENT> SELECT "city", "ST_Point"(cast("loc"
> [0]
> > AS DOUBLE), cast("loc" [1] AS DOUBLE)) FROM "geode"."Zips"LIMIT 10;
> > 2017-11-28 10:19:15,199 [main] ERROR -
> > org.apache.calcite.sql.validate.SqlValidatorException: No match found
> for
> > function signature ST_Point(<NUMERIC>, <NUMERIC>)
> > 2017-11-28 10:19:15,199 [main] ERROR -
> > org.apache.calcite.runtime.CalciteContextException: From line 1, column
> 16
> > to line 1, column 79: No match found for function signature
> > ST_Point(<NUMERIC>, <NUMERIC>)
> > Error: Error while executing SQL "SELECT "city", "ST_Point"(cast("loc"
> [0]
> > AS DOUBLE), cast("loc" [1] AS DOUBLE)) FROM "geode"."Zips"LIMIT 10": From
> > line 1, column 16 to line 1, column 79: No match found for function
> > signature ST_Point(<NUMERIC>, <NUMERIC>) (state=,code=0)
> >
> > On 28 November 2017 at 09:32, Christian Tzolov <ctzo...@pivotal.io>
> wrote:
> >
> > > @Julian are there some tests, json datasets? Perhaps in
> > > calcite-test-dataset?
> > > Also I will try to cast the "loc" from Zips into DOUBLE columns to test
> > > the ST_Point
> > >
> > > On 28 November 2017 at 02:24, Julian Hyde <jh...@apache.org> wrote:
> > >
> > >> It’s true that you can’t define a GEOMETRY column in a foreign table.
> > But
> > >> you can define a VARCHAR column and apply the ST_GeomFromText to it,
> or
> > if
> > >> you want a point you can define a pair of DOUBLE columns and apply the
> > >> ST_Point function.
> > >>
> > >> In essence, our implementation of GEOMETRY is only an in-memory format
> > >> right now, not an on-disk format. It’s a little less efficient than a
> > >> native GEOMETRY data type but hopefully over time we will write
> > optimizer
> > >> rules that push down filters etc. so we don’t literally construct an
> > >> in-memory geometry object for every row, only the rows we are
> > interested in.
> > >>
> > >> Julian
> > >>
> > >> > On Nov 27, 2017, at 2:59 AM, Christian Tzolov <ctzo...@pivotal.io>
> > >> wrote:
> > >> >
> > >> > Hey there,
> > >> >
> > >> > I'm exploring the new Spatial (https://calcite.apache.org/do
> > >> cs/spatial.html)
> > >> > functionality and i've been trying to figure out what are the
> minimal
> > >> > requirements for using it with my custom adapter.
> > >> >
> > >> > Following the guidelines i've set LENIENT conformance in my jdbc
> URL
> > (
> > >> > jdbc:calcite:conformance=LENIENT;
> > >> > model=...my model
> > >> >
> > >> >
> > >> > )
> > >> >
> > >> > But I am not sure how define the GEOMETRY column types?
> > >> >
> > >> > Currently my custom Schema/Table factory implementation infers the
> > >> column
> > >> > types from the underlaying system's field types.
> > >> >
> > >> > So it seems that i need to change my implementation and somehow to
> > hint
> > >> > which fields needs to be mapped to GEOMETRY types? Or perhaps i can
> > >> try to
> > >> > do some expensive casting in SQL?
> > >> >
> > >> > Are there any guidelines, examples for using Spatial functionality
> on
> > >> 3rd
> > >> > party (e.g. custom) adapters?
> > >> >
> > >> > Thanks,
> > >> > Christian
> > >>
> > >>
> > >
> > >
> > > --
> > > Christian Tzolov <http://www.linkedin.com/in/tzolov> | Principle
> > Software
> > > Engineer | Spring <https://spring.io/>.io | Pivotal <
> http://pivotal.io/>
> > > | ctzo...@pivotal.io
> > >
> >
> >
> >
> > --
> > Christian Tzolov <http://www.linkedin.com/in/tzolov> | Principle
> Software
> > Engineer | Spring <https://spring.io/>.io | Pivotal <http://pivotal.io/>
> |
> > ctzo...@pivotal.io
> >
>
--
Christian Tzolov <http://www.linkedin.com/in/tzolov> | Principle Software
Engineer | Spring <https://spring.io/>.io | Pivotal <http://pivotal.io/> |
ctzo...@pivotal.io
