ST_YMax method for type ST

geometry-expression.ST_YMax()

DOUBLE Returns the maximum Y coordinate value of the geometry-expression.

Returns the maximum Y coordinate value of the geometry-expression. This is computed by comparing the Y attribute of all points in the geometry.

Note that in round-Earth model, minimum corresponds to southernmost point of the geometry-expression (which may not be one of the points defining the geometry) and maximum corresponds to the northernmost point of the geometry-expression.

Note

If the geometry-expression is an empty geometry (ST_IsEmpty()=1), then this method returns NULL.

Note

By default, ST_YMax uses the original format for a geometry, if it is available. Otherwise, the internal format is used. For more information about internal and original formats, see STORAGE FORMAT clause, CREATE SPATIAL REFERENCE SYSTEM statement.

SQL/MM (ISO/IEC 13249-3: 2006) Vendor extension

The following example returns the result 6.

SELECT NEW ST_LineString( 'LineString ZM( 1 2 3 4, 5 6 7 8 )' ).ST_YMax()

ST_YMax method for type ST_Geometry

Syntax

Returns

Remarks

Note

Note

See also

Standards and compatibility

Example