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地理空間関数

ST_ENDPOINT

Returns the last Point in a LineString.

See also:

ST_POINTN , ST_STARTPOINT

Syntax

ST_ENDPOINT( <geography_or_geometry_expression> )

Arguments

geography_or_geometry_expression

The argument must be an expression of type GEOGRAPHY or GEOMETRY that represents a LineString.

Returns

The function returns a value of type GEOGRAPHY or GEOMETRY that contains the last Point of the specified LineString.

Usage Notes

  • If geography_or_geometry_expression is not a LineString, the function reports an error.

Examples

GEOGRAPHY Examples

The following query returns the last Point in a LineString:

ALTER SESSION SET GEOGRAPHY_OUTPUT_FORMAT='WKT';
SELECT ST_ENDPOINT(TO_GEOGRAPHY('LINESTRING(1 1, 2 2, 3 3, 4 4)'));

+-------------------------------------------------------------+
| ST_ENDPOINT(TO_GEOGRAPHY('LINESTRING(1 1, 2 2, 3 3, 4 4)')) |
|-------------------------------------------------------------|
| POINT(4 4)                                                  |
+-------------------------------------------------------------+

GEOMETRY Examples

The following query returns the last Point in a LineString:

ALTER SESSION SET GEOMETRY_OUTPUT_FORMAT='WKT';
SELECT ST_ENDPOINT(TO_GEOMETRY('LINESTRING(1 1, 2 2, 3 3, 4 4)'));

+------------------------------------------------------------+
| ST_ENDPOINT(TO_GEOMETRY('LINESTRING(1 1, 2 2, 3 3, 4 4)')) |
|------------------------------------------------------------|
| POINT(4 4)                                                 |
+------------------------------------------------------------+
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