NEW ST_CircularString(text-representation[, srid])

Constructs a circular string from a character string representation. The database server determines the input format by inspecting the provided string.

The following returns CircularString (5 10, 10 12, 15 10)

SELECT NEW ST_CircularString('CircularString (5 10, 10 12, 15 10)')

The following example shows a circularstring with two semi-circle segments.

SELECT NEW ST_CircularString('CircularString (0 4, 2.5 6.5, 5 4, 7.5 1.5, 10 4)') CS