ST_Polygon(LONG VARCHAR[, INT]) constructor

NEW ST_Polygon(text-representation[, srid])

Name	Type	Description
text-representation	LONG VARCHAR	A string containing the text representation of a polygon. 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 polygon from a character string representation. The database server determines the input format by inspecting the provided string.

The following returns Polygon ((-5 -5, 5 -5, 0 5, -5 -5), (-2 -2, -2 2, 2 2, 2 -2, -2 -2))

SELECT NEW ST_Polygon('Polygon ((-5 -5, 5 -5, 0 5, -5 -5), (-2 -2, -2 2, 2 2, 2 -2, -2 -2))')