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Aggregator (Flink)

ST_Envelope_Aggr

Introduction: Return the entire envelope boundary of all geometries in A

Format: ST_Envelope_Aggr (A: geometryColumn)

Since: v1.3.0

Example:

SELECT ST_Envelope_Aggr(ST_GeomFromText('MULTIPOINT(1.1 101.1,2.1 102.1,3.1 103.1,4.1 104.1,5.1 105.1,6.1 106.1,7.1 107.1,8.1 108.1,9.1 109.1,10.1 110.1)'))

Output:

POLYGON ((1.1 101.1, 1.1 120.1, 20.1 120.1, 20.1 101.1, 1.1 101.1))

ST_Intersection_Aggr

Introduction: Return the polygon intersection of all polygons in A

Format: ST_Intersection_Aggr (A: geometryColumn)

Since: v1.5.0

Example:

SELECT ST_Intersection_Aggr(ST_GeomFromText('MULTIPOINT(1.1 101.1,2.1 102.1,3.1 103.1,4.1 104.1,5.1 105.1,6.1 106.1,7.1 107.1,8.1 108.1,9.1 109.1,10.1 110.1)'))

Output:

MULTIPOINT ((1.1 101.1), (2.1 102.1), (3.1 103.1), (4.1 104.1), (5.1 105.1), (6.1 106.1), (7.1 107.1), (8.1 108.1), (9.1 109.1), (10.1 110.1))

ST_Union_Aggr

Introduction: Return the polygon union of all polygons in A. All inputs must be polygons.

Format: ST_Union_Aggr (A: geometryColumn)

Since: v1.3.0

Example:

SELECT ST_Union_Aggr(ST_GeomFromText('MULTIPOINT(1.1 101.1,2.1 102.1,3.1 103.1,4.1 104.1,5.1 105.1,6.1 106.1,7.1 107.1,8.1 108.1,9.1 109.1,10.1 110.1)'))

Output:

MULTIPOINT ((1.1 101.1), (2.1 102.1), (3.1 103.1), (4.1 104.1), (5.1 105.1), (6.1 106.1), (7.1 107.1), (8.1 108.1), (9.1 109.1), (10.1 110.1))
Last update: November 11, 2023 03:16:06