Is anyone else using python to directly interact with their DBMS?

4452
13
09-10-2014 01:09 PM
ChrisMathers
Occasional Contributor III

I use pypodbc to connect and query my SQL servers on occasion and was curious if anyone else was doing this as well. If you are, what module are you using?

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13 Replies
ChrisPedrezuela
Occasional Contributor III

I use arcpy.ArcSDESQLExecute.

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ChrisMathers
Occasional Contributor III

I like arcpy.ArcSDESQLExecute but Im not usually looking for spatial data or even geodatabase data when I do this.

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CarstenBøcker1
New Contributor II

I have used pyodbc for SQL Server and cx_oracle for Oracle. Hovever recently i have turned more and more to AcSDESQLExecute. You don't have to install third party libraries (a problem at many sites) and I also like that the results are returned as lists.  

I haven't tested performance, so I don't know if there's an overhead using AcSDESQLExecute compared to the native python libraries.

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JamesCrandall
MVP Frequent Contributor

cx_Oracle here.

It's not always SDE data that is needed and non-spatial attribute data can be utilized in functional ways (mapping, joins, raster processing, etc...)

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CameronMcCormick
Occasional Contributor

Using cx_Oracle here too.  Great little extension

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ZoeZaloudek
Occasional Contributor

I downloaded and installed MySQLdb to access data on our SQL databases.  It was the first thing I tried that worked and I've just been using it ever since.

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KevinBrown2
New Contributor II

I'm using win32com to instantiate ADODB objects:

<CODE>

from win32com.client import Dispatch

connection = Dispatch('ADODB.Connection')

connection.Open(dsn)

rs = Dispatch('ADODB.RecordSet')

rs = connection.Execute(sql)

</CODE>

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ThomasStanley-Jones
New Contributor III

I use comtypes to interact with ArcObjects direcly.  I've found it a lot less buggy than arcpy, although I don't do much more than retrieve data from our servers.

def getConnection():

    """

    Creates and returns a connection to the Database

    @return: SdeWorkspace as ISqlWorkspace

    """

    import comtypes.gen.esriSystem as esriSystem

    import comtypes.gen.esriDataSourcesGDB as esriDataSourcesGDB

    import comtypes.gen.esriGeoDatabase as esriGeodatabase

    # Set connection properties for OLE DB connection

    conprop = Snippets.NewObj(esriSystem.PropertySet, esriSystem.IPropertySet)

    conprop.SetProperty("INSTANCE", "sde:sqlserver:?????")

    conprop.SetProperty("DATABASE", "?????")

    conprop.SetProperty("AUTHENTICATION_MODE", "OSA")

    # Create workspace

    SDEWorkspaceFactory = Snippets.NewObj(esriDataSourcesGDB.SdeWorkspaceFactory, esriGeodatabase.IWorkspaceFactory)

    SDEWorkspace = SDEWorkspaceFactory.Open(conprop, 0)

    sqlworkspace = Snippets.CType(SDEWorkspace, esriGeodatabase.ISqlWorkspace)

    return sqlworkspace

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ChrisMathers
Occasional Contributor III

Wow! Ive never used the comtypes library before. That is really cool. Going to have to add that to the list of things to read up on.

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