polygon overlay - Mailing list pgsql-sql

From Gary Fu
Subject polygon overlay
Date
Msg-id i5jrbg$1nph$1@news.hub.org
Whole thread Raw
Responses Re: polygon overlay  (Tom Lane <tgl@sss.pgh.pa.us>)
List pgsql-sql
Hi,

I don't see any overlap between the polygon and the box in the following 
sql. Can anyone explain why it returns 't'?
 select polygon(path '((0,0),(10,10),(20,10),(10,0))') && polygon(box 
'((16,0),(17,1))'); ?column?
---------- t
(1 row)

Thanks,
Gary


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