[postgis-users] Problem with using query layer in ArcGIS 10

[Melpati, Muni]

Hi William,
Thank you for response. It is great that you showed interest in helping me on this. After playing with the query tool, it was very evident that I need to pick one single unique identifier field. The problem I am facing happens despite the fact that I selected one single field as unique identifier.  I have two layers (one with 13,000 records and another with 55,600 records). Smaller file works like any other shape file. The larger file would through up loading data problem.

Note: If I, either select a bunch features  or use identify tool, I could see all the attributes. In other cases, though I could not see attributes, I could see all the features on the map.
I could also use attribute query tool on the same data and select records and  view them.  However, I simply having trouble with opening the table and viewing all the records.
Also I am unable to export to shapefile from ArcMap when this problem occurs.
Thanks.


Message: 5

Date: Mon, 02 Jul 2012 13:41:33 +0200

From: William Humphrey Temperley <william.temperley at jrc.ec.europa.eu<mailto:william.temperley at jrc.ec.europa.eu>>

Subject: Re: [postgis-users] Problem with using query layer in ArcGIS

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To: "'PostGIS Users Discussion'"

      <postgis-users at postgis.refractions.net<mailto:postgis-users at postgis.refractions.net>>

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From: postgis-users-bounces at postgis.refractions.net<mailto:postgis-users-bounces at postgis.refractions.net>

[mailto:postgis-users-bounces at postgis.refractions.net] On Behalf Of Melpati, Muni

Sent: 28 June 2012 21:19

To: postgis-users at postgis.refractions.net<mailto:postgis-users at postgis.refractions.net>

Subject: [postgis-users] Problem with using query layer in ArcGIS 10





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."





I found similar problem somewhere in GIS forums where the user had to change the MAXBLOBSIZE value to -1 (unlimited) in the SDE SERVER CONFIG FILE. Is there similar fix to postgis/postgres? I appreciate your support.



Thanks.









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.





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.





HTH,





Will Temperley

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