[postgis-devel] [PostGIS] #1453: ST_Equals(empty, empty) returns false
PostGIS
trac at osgeo.org
Thu Jan 12 03:38:17 PST 2012
#1453: ST_Equals(empty, empty) returns false
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Reporter: strk | Owner: pramsey
Type: defect | Status: new
Priority: medium | Milestone: PostGIS 2.0.0
Component: postgis | Version: trunk
Keywords: |
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Comment(by strk):
So, ST_Equals is broken only because of the use of && done by the SQL
wrapper.
_ST_Equals already returns true for 2 EMPTY parameters (no matter type and
dimension).
I propose to switch ST_Equals to use ~= which means "same box".
There should be no issue with floats vs. double as we always round boxes
to float be them computed or cached. If we still don't it's a bug in our
side which we want to fix.
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Ticket URL: <http://trac.osgeo.org/postgis/ticket/1453#comment:5>
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