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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>The question is more “returning an error or a warning (with null values)…” I will deal with the message text…<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> Mateusz Loskot [mailto:mateusz@loskot.net] <br><b>Sent:</b> 24 mars 2011 19:11<br><b>To:</b> Pierre Racine; PostGIS Development Discussion<br><b>Subject:</b> Re: [postgis-devel] What to return when refering to an invalid band number<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal style='margin-bottom:12.0pt'>Pierre,<br>What about returning "band index is out of range" for any<br>invalid band index?<br><br>Regards,<br>-- <br>Mateusz Łoskot, http::/mateusz.loskot.net<br>(Sent from my mobile)<br><br>----- Reply message -----<br>From: "Pierre Racine" <Pierre.Racine@sbf.ulaval.ca><br>Date: Thu, Mar 24, 2011 22:37<br>Subject: [postgis-devel] What to return when refering to an invalid band number<br>To: "PostGIS Development Discussion" <postgis-devel@postgis.refractions.net><br><br>Right now if I do this query on a raster having only one band:<br><br> SELECT ST_Value(rast, 0, 1, 1) FROM myraster<br><br>I get "ERROR: RASTER_getPixelValue: Invalid band index (must use 1-based)"<br><br>If I do:<br><br> SELECT ST_Value(rast, 2, 1, 1) FROM myraster<br><br>I get "NOTICE: Could not find raster band of index 2 when getting pixel value. Returning NULL"<br><br>and a NULL value.<br><br>The answer should be the same if I ask for band 0 or band 2 but which one? An error or a warning with a NULL (or a set of NULL for a tiled coverage)?<br><br>This symptom is generalised to every other function getting band properties (st_bandnodatavalue, st_bandpixeltype, etc...).<br><br>Pierre<br><br>_______________________________________________<br>postgis-devel mailing list<br>postgis-devel@postgis.refractions.net<br><a href="http://postgis.refractions.net/mailman/listinfo/postgis-devel">http://postgis.refractions.net/mailman/listinfo/postgis-devel</a><br><br><o:p></o:p></p></div></div></body></html>