[mapguide-users] Help with joining tables please

[Dave Wilson]

What datatype is your GPS_LAT/LON fields?

You have to click the Geometry check box (in Studio) in order to set the X and Y columns (these aren't key columns).

So is your data just point data then and you are using the ODBC Provider for both sources?

Dave

From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Darren Karasiuk
Sent: Thursday, March 26, 2009 3:07 PM
To: 'MapGuide Users Mail List'
Subject: RE: [mapguide-users] Help with joining tables please

Hi Dave, thank you for the suggestions. I am using a single database and trying to join tables within them.
I agree that using a View is the best choice, because that also allows me to adjust time zones.

The problem I'm having now is MapGuide Studio will NOT display my GPS_LAT and GPS_LON fields when setting up the geometry. Out of 39 columns, only five are selectable.
One thing that appears different is for the native table, only two columns are listed as "key" fields and they are not the GPS_LAT/LON columns.  My new view has almost all of the columns as a "key" field including the lat/lon columns.
How can I move the "key" fields to the selectable x, y columns?

Darren

________________________________
From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Dave Wilson
Sent: March 26, 2009 8:39 AM
To: MapGuide Users Mail List
Subject: RE: [mapguide-users] Help with joining tables please

Of course if both tables are in the same database instance you might get your DBA to create a view joining the two tables for you. The performance would be better.

Dave

From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Dave Wilson
Sent: Wednesday, March 25, 2009 5:23 PM
To: MapGuide Users Mail List
Subject: RE: [mapguide-users] Help with joining tables please

Can we assume your spatial data is in tableA and you are using a Spatial provider connection? For table B I would suggest using an ODBC connection via a DSN. You don't need the overhead of the spatial provider stuff for the joined table.

The same should apply when joining to SDF. In almost all cases the join should use an ODBC connection to the secondary data.

Dave

From: mapguide-users-bounces at lists.osgeo.org [mailto:mapguide-users-bounces at lists.osgeo.org] On Behalf Of Darren Karasiuk
Sent: Wednesday, March 25, 2009 4:47 PM
To: 'MapGuide Users Mail List'
Subject: [mapguide-users] Help with joining tables please

Hello, I've been fighting with this for a while and need your help.

I want to combine a few tables together and have that data available for themeing and viewing.
Without attempting to join tables, the data loads without any problem. However, I have not been able to get tables joined.

Using normal SQL Server 2008 "inner join tableB on tableA.location = tableB.location" is what I'm trying to do.
Using the Autdesk Mapguide Studio, I click through, set up my joining tables exactly as I would in SQL.
In the layer definition editor, I see the new attributes.
Before doing anything else, I export the layer as XML and test my map.  The map viewer doesn't stop showing the busy icon, the legend labels become question marks (?) and no data ever loads.  If I disable the layer, all the other layers show quickly.

I've tried using the same database connection, a different database connection, and a SDF imported from a shapefile. No method appears to work for me.

Is there a proper way of setting up joining tables? Should I learn the XML syntax and do it manually?

Thanks for your help,

Darren
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