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https://issues.apache.org/jira/browse/FLINK-9219?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16456223#comment-16456223
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Xingcan Cui commented on FLINK-9219:
------------------------------------
Hi [~twalthr]] and [~fhueske], I‘ve tried to implement three functions
({{ST_PointFromText}}, {{ST_AsText}}, and {{ST_GeomFromText}}) in [this
branch|https://github.com/xccui/flink/tree/FLINK-9219-Spatio].
Before going further, I wonder if you could help to give a pre-review. Though
the code seems to work, I'm not quite sure if it's meet the standards in some
aspects (e.g., the names, the codes' position and the way of dealing with
overloaded methods).
Thanks, Xingcan
> 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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