Amazon Redshift will no longer support the creation of new Python UDFs starting November 1, 2025. If you would like to use Python UDFs, create the UDFs prior to that date. Existing Python UDFs will continue to function as normal. For more information, see the blog post .

ST_MemSize

ST_MemSize returns the amount of memory space (in bytes) used by the input geometry. This size depends on the Amazon Redshift internal representation of the geometry and thus can change if the internal representation changes. You can use this size as an indication of the relative size of geometry objects in Amazon Redshift.

Syntax

ST_MemSize(geom)

Arguments

Return type

INTEGER representing the inherent dimension of geom.

If geom is null, then null is returned.

Examples

The following SQL returns the memory size of a geometry collection.

SELECT ST_MemSize(ST_GeomFromText('GEOMETRYCOLLECTION(POLYGON((0 0,10 0,0 10,0 0)),LINESTRING(20 10,20 0,10 0))'))::varchar + ' bytes';

 ?column?  
-----------
 172 bytes