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</o:shapelayout></xml><![endif]--></head><body lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><span style='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 lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif"'> postgis-users-bounces@postgis.refractions.net [mailto:postgis-users-bounces@postgis.refractions.net] <b>On Behalf Of </b>Melpati, Muni<br><b>Sent:</b> 28 June 2012 21:19<br><b>To:</b> postgis-users@postgis.refractions.net<br><b>Subject:</b> [postgis-users] Problem with using query layer in ArcGIS 10<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=EN-US>Hi I was querying posgis layers from ArcGIS 10. I found that if add postgis layer with huge number of records, I am having trouble with accessing its attributes. When I try to open the table I get “Could not load data from the data source. If you can correct the problem, press the refresh button to reload data. Possible problems can include bad network connection, invalid field, etc. The SQL statement was not a select statement. The operation is not supported by this implementation.”<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US>I found similar problem somewhere in GIS forums where the user had to change the </span><span lang=EN style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:#3E3E3E'>MAXBLOBSIZE value to -1 (unlimited) in</span><span lang=EN-US> the SDE SERVER CONFIG FILE. Is there similar fix to postgis/postgres? I appreciate your support.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US>Thanks.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p></div><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>By default ArcGIS uses all the fields in the query as the unique key. Tools such as identify labeling and the attribute table do not work when this is the case. To make them work the primary key of the data source should be used as the unique key. This also speeds up the loading of data. <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>After writing a query, you need to click the Validate button and tick “Show advanced options”. The Next button will now be highlighted - click it. Uncheck all fields in the Unique identifier fields list except the correct primary key or unique field. The attribute table should now work if you provided a unique key.<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>HTH, <o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span lang=EN-US style='color:#1F497D'>Will Temperley<o:p></o:p></span></p></div></body></html>