ST_XMAX

Returns the maximum longitude (X coordinate) of all points contained in the specified GEOMETRY or GEOGRAPHY object.

Syntax

ST_XMAX(<geometry_or_geography>)

Arguments

Return Type

Double.

Examples

GEOMETRY examples

SELECT
  ST_XMAX(
    TO_GEOMETRY(
      'GEOMETRYCOLLECTION(POINT(40 10),LINESTRING(10 10,20 20,10 40),POINT EMPTY)'
    )
  ) AS pipeline_xmax;

┌───────────────┐
│ pipeline_xmax │
├───────────────┤
│            40 │
└───────────────┘

SELECT
  ST_XMAX(
    TO_GEOMETRY(
      'GEOMETRYCOLLECTION(POINT(40 10),LINESTRING(10 10,20 20,10 40),POLYGON((40 40,20 45,45 30,40 40)))'
    )
  ) AS pipeline_xmax;

┌───────────────┐
│ pipeline_xmax │
├───────────────┤
│            45 │
└───────────────┘

GEOGRAPHY examples

SELECT
  ST_XMAX(
    ST_GEOGFROMWKT(
      'LINESTRING(-179 0, 179 0)'
    )
  ) AS pipeline_xmax;

┌───────────────┐
│ pipeline_xmax │
├───────────────┤
│           179 │
└───────────────┘