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https://issues.apache.org/jira/browse/FLINK-9219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16451852#comment-16451852
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Timo Walther commented on FLINK-9219:
-------------------------------------
I don't know if it makes sense to expose a type
{{org.apache.calcite.runtime.Geom}}. I think we should create our own {{Geo}}
type that just implements the {{Geom}} interface. I guess this is the reason
why {{bind()}} has a {{protected}} visibility and can be overwritten.
> Add support for OpenGIS features in Table & SQL API
> ---------------------------------------------------
>
> Key: FLINK-9219
> URL: https://issues.apache.org/jira/browse/FLINK-9219
> Project: Flink
> Issue Type: New Feature
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Xingcan Cui
> Priority: Major
>
> CALCITE-1968 added core functionality for handling
> spatial/geographical/geometry data. It should not be too hard to expose these
> features also in Flink's Table & SQL API. We would need a new {{GEOMETRY}}
> data type and connect the function APIs.
> Right now the following functions are supported by Calcite:
> {code}
> ST_AsText, ST_AsWKT, ST_Boundary, ST_Buffer, ST_Contains,
> ST_ContainsProperly, ST_Crosses, ST_Disjoint, ST_Distance, ST_DWithin,
> ST_Envelope, ST_EnvelopesIntersect, ST_Equals, ST_GeometryType,
> ST_GeometryTypeCode, ST_GeomFromText, ST_Intersects, ST_Is3D,
> ST_LineFromText, ST_MakeLine, ST_MakePoint, ST_MLineFromText,
> ST_MPointFromText, ST_MPolyFromText, ST_Overlaps, ST_Point, ST_PointFromText,
> ST_PolyFromText, ST_SetSRID, ST_Touches, ST_Transform, ST_Union, ST_Within,
> ST_Z
> {code}
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