How can i type typecast a CircularString Polygon or Multipolygon in PostGIS? I am doing so because CircularString Datatype is not supported by QGIS and i have to create a circle or ellipse, and it should get display on QGIS map canvas.
ST_CurveToLine — Converts a CIRCULARSTRING/CURVEDPOLYGON to a LINESTRING/POLYGON
To create a polygon, use
ST_BuildArea — Creates an areal geometry formed by the constituent linework of given geometry