ST_LineString(LONG VARCHAR[, INT]) constructor

NEW ST_LineString(text-representation[, srid])

Name	Type	Description
text-representation	LONG VARCHAR	A string containing the text representation of a linestring. The input can be in any supported text input format, including WKT or EWKT.
srid	INT	The SRID of the result. If not specified, the default is 0.

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

The following returns LineString (0 0, 5 10)

SELECT NEW ST_LineString('LineString (0 0, 5 10)')