[postgis-users] ST_Buffer returning multipolygons

[marquz74]

Hi to all,
I'm practicing with ST_buffer on North Carolina Dataset (nc_spm_08). 
By running the following query:

SELECT GeometryType(sub.buffer)
FROM (  
        SELECT st_buffer (the_geom, 100) AS buffer 
        FROM streams
) AS sub  
WHERE
        GeometryType(sub.buffer)  <> 'POLYGON';

I've been getting some MULTIPOLYGON records. 
Is it possible? I guessed ST_Buffer could return POLYGON geometries only...
was I wrong?

Thanks in advance.

Marco



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