Amazon Redshift will no longer support the use of Python UDFs after June 30, 2026.
We will start enforcing it in phases. For more information on the details of Python end of life
and migration options, see the
blog post
ST_Polygon
ST_Polygon returns a polygon geometry whose outer ring is the input linestring with the value that was input for the spatial reference system identifier (SRID).
The dimension of the returned geometry is the same as that of the input geometry.
Syntax
ST_Polygon(linestring, srid)
Arguments
- linestring
-
A value of data type
GEOMETRYor an expression that evaluates to aGEOMETRYtype. The subtype must beLINESTRINGthat represents a linestring. The linestring value must be closed. - srid
-
A value of data type
INTEGERthat represents a SRID.
Return type
GEOMETRY of subtype POLYGON.
The SRID value of the returned geometry is set to srid.
If linestring or srid is null, then null is returned.
If linestring is not a linestring, then an error is returned.
If linestring is not closed, then an error is returned.
If srid is negative, then an error is returned.
Examples
The following SQL constructs a polygon with an SRID value.
SELECT ST_AsEWKT(ST_Polygon(ST_GeomFromText('LINESTRING(77.29 29.07,77.42 29.26,77.27 29.31,77.29 29.07)'),4356));
st_asewkt
-------------
SRID=4356;POLYGON((77.29 29.07,77.42 29.26,77.27 29.31,77.29 29.07))