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List:       postgis-users
Subject:    [postgis-users] ST_Estimated_Extent
From:       Nicolai Parlog <nicolai.parlog () disy ! net>
Date:       2015-03-11 12:09:25
Message-ID: 55003075.5060301 () disy ! net
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  Hi!

I'm new to PostGIS and am tasked with making some existing queries work 
on different PostGIS versions. I am currently dealing with 
ST_Estimated_Extent and have a question regarding its behavior changes 
across different versions.

In some failure cases (e.g. empty table) the method returns null. But 
this was not always so, "[p]rior to version 1.5.4 an exception was 
thrown instead"[1, 2]. But I know that at least in 1.3.3 it also returns 
null and was told that this changed some time in 1.4.x.

I did not find anything to that effect in the release notes[3]. It would 
be great if someone could point me to a source which documents when the 
behavior changed from "return null" to "throw an exception".

  Thanks in advance
  Nicolai Parlog


[1] http://postgis.net/docs/ST_Estimated_Extent.html
[2] http://postgis.net/docs/release_notes.html#idp72360512
[3] http://postgis.net/docs/release_notes.html



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