Description

Implemented several GeoSpatial SQL functions that were previously unsupported in Babelfish. The following functions have been added:

1. STDimension
2. STDisjoint
3. STIntersects
4. STIsClosed
5. STIsEmpty
6. STIsValid

Changes include:

1. Function Implementations:

   • Utilized PostGIS functions where appropriate, with necessary adjustments to ensure compatibility.

2. Parser Updates:

   • Added function definitions to the SQL parser to recognize these new functions.
   • Ensured proper syntax handling for each function, including parameter types and return values.

3. Test Cases:

   • Created comprehensive test cases for each function, covering various scenarios including

4. Error Handling:

   • Implemented appropriate error handling

Testing:

• All new functions pass the added test cases.
• Existing functionality remains unaffected.

###Exapmles:

1. For STIntersects

DECLARE @point1 geometry, @point2 geometry;
SET @point1 = geometry::STPointFromText('POINT(-122.354657658684900 47.658678768678100)', 4326);
SET @point2 = geometry::STPointFromText('POINT(-122.354657658684900 47.658678768678100)', 4326);
SELECT @point1.STIntersects(@point2) AS Intersecting;
go

Output:
Intersecting
------
1

2. For STDisjoint

DECLARE @point1 geography, @point2 geography;
SET @point1 = geography::STGeomFromText('POINT(-122.34900 47.65100)', 4326);
SET @point2 = geography::STGeomFromText('POINT(-122.34900 47.65100)', 4326);
SELECT @point1.STDisjoint(@point2) AS disjoint;
go

Output:
disjoint
------
0

3. For STDimension

DECLARE @point geometry;
SET @point = geometry::STPointFromText('POINT(-122.34900 47.65100)', 4326);
SELECT STDimension(@point);
go

Output:

------
0

4. For STIsEmpty

DECLARE @point geometry;
SET @point = geometry::STPointFromText('POINT(-122.34900 47.65100)', 4326);
SELECT STIsEmpty(@point);
go

Output:

------
0

5. For STIsValid

DECLARE @point geography;
SET @point = geography::STPointFromText('POINT(-122.34900 47.65100)', 4326);
SELECT STIsValid(@point);
go

Output:

------
1

6. For STIsClosed

DECLARE @point geography;
SET @point = geography::STPointFromText('POINT(-122.34900 47.65100)', 4326);
SELECT STIsClosed(@point);
go

Output:

------
0

Issues Resolved

Task: BABEL-5579

Test Scenarios Covered

• Use case based - Yes

• Boundary conditions - Yes

• Arbitrary inputs - Yes

• Negative test cases - Yes

• Minor version upgrade tests -

• Major version upgrade tests -

• Performance tests -

• Tooling impact -

• Client tests -

Check List

• Commits are signed per the DCO using --signoff

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