ST_NumPoints method for type ST

Returns the number of points defining the linestring.

By default, ST_NumPoints 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.

linestring-expression.ST_NumPoints()

The following example returns the result NULL.

SELECT NEW ST_LineString().ST_NumPoints()

The following example returns the result 2.

SELECT NEW ST_LineString( NEW ST_Point( 0, 0 ), NEW ST_Point( 1, 1 ) ).ST_NumPoints()

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