Examples with Description com.facebook.presto.spi.function.Description used on opensource projects

Example 26 with Description

use of com.facebook.presto.spi.function.Description in project presto by prestodb.

the class GeoFunctions method stPoints.

@SqlNullable
@Description("Returns an array of points in a geometry")
@ScalarFunction("ST_Points")
@SqlType("array(" + GEOMETRY_TYPE_NAME + ")")
public static Block stPoints(@SqlType(GEOMETRY_TYPE_NAME) Slice input) {
    Geometry geometry = deserialize(input);
    if (geometry.isEmpty()) {
        return null;
    }
    BlockBuilder blockBuilder = GEOMETRY.createBlockBuilder(null, geometry.getNumPoints());
    buildPointsBlock(geometry, blockBuilder);
    return blockBuilder.build();
}

Example 27 with Description

use of com.facebook.presto.spi.function.Description in project presto by prestodb.

the class GeoFunctions method stCentroid.

@Description("Returns the Point value that is the mathematical centroid of a Geometry")
@ScalarFunction("ST_Centroid")
@SqlType(GEOMETRY_TYPE_NAME)
public static Slice stCentroid(@SqlType(GEOMETRY_TYPE_NAME) Slice input) {
    Geometry geometry = deserialize(input);
    validateType("ST_Centroid", geometry, EnumSet.of(POINT, MULTI_POINT, LINE_STRING, MULTI_LINE_STRING, POLYGON, MULTI_POLYGON));
    GeometryType geometryType = GeometryType.getForJtsGeometryType(geometry.getGeometryType());
    if (geometryType == GeometryType.POINT) {
        return input;
    }
    if (geometry.getNumPoints() == 0) {
        return serialize(createJtsEmptyPoint());
    }
    return serialize(geometry.getCentroid());
}

Example 28 with Description

use of com.facebook.presto.spi.function.Description in project presto by prestodb.

the class GeoFunctions method stDifference.

@Description("Returns the Geometry value that represents the point set difference of two geometries")
@ScalarFunction("ST_Difference")
@SqlType(GEOMETRY_TYPE_NAME)
public static Slice stDifference(@SqlType(GEOMETRY_TYPE_NAME) Slice left, @SqlType(GEOMETRY_TYPE_NAME) Slice right) {
    OGCGeometry leftGeometry = EsriGeometrySerde.deserialize(left);
    OGCGeometry rightGeometry = EsriGeometrySerde.deserialize(right);
    verifySameSpatialReference(leftGeometry, rightGeometry);
    return EsriGeometrySerde.serialize(leftGeometry.difference(rightGeometry));
}

Example 29 with Description

use of com.facebook.presto.spi.function.Description in project presto by prestodb.

the class GeoFunctions method stEndPoint.

@SqlNullable
@Description("Returns the last point of a LINESTRING geometry as a Point")
@ScalarFunction("ST_EndPoint")
@SqlType(GEOMETRY_TYPE_NAME)
public static Slice stEndPoint(@SqlType(GEOMETRY_TYPE_NAME) Slice input) {
    Geometry geometry = deserialize(input);
    validateType("ST_EndPoint", geometry, EnumSet.of(LINE_STRING));
    if (geometry.isEmpty()) {
        return null;
    }
    return serialize(((LineString) geometry).getEndPoint());
}

Example 30 with Description

use of com.facebook.presto.spi.function.Description in project presto by prestodb.

the class GeoFunctions method stPolygon.

@Description("Returns a Geometry type Polygon object from Well-Known Text representation (WKT)")
@ScalarFunction("ST_Polygon")
@SqlType(GEOMETRY_TYPE_NAME)
public static Slice stPolygon(@SqlType(VARCHAR) Slice input) {
    Geometry geometry = jtsGeometryFromWkt(input.toStringUtf8());
    validateType("ST_Polygon", geometry, EnumSet.of(POLYGON));
    return serialize(geometry);
}