[python-win32] ADODB.Recordset returning incorrect results
timr at probo.com
Thu Jun 21 19:38:48 CEST 2007
Matthew Perry wrote:
> I'm using Access 2000 .mdb as a backend to my python script and am
> seeing some inconsistencies in the results.
> If I run the script below, I get 15 rows.
> If I run the SAME EXACT query directly in MS Access, I get 12 rows.
Can you see any pattern to the rows that are missing? The query seems
> Perhaps relevant to the issue - the table referenced in the query
> below is not actually a table but another query. Can you use rs.Open()
> on a chained query?
Yes, this should work fine.
> Is there some sort of caching going on?
No, there's no caching. Remember this is file based: when you close the
file, all memory is gone.
> Why is there a discrepency?
Don't know. As an experiment, you might try doing this with DAO instead
of ADODB. DAO is the native API for the Jet engine; it's quicker than
ADODB, but much less general.
engine = win32com.client.Dispatch("DAO.DBEngine.36")
dao = engine.OpenDatabase('c:\\test1.mdb')
sql = "SELECT [STUDY AREA] AS area FROM [qry base dataset - SS copcs
only] GROUP BY [STUDY AREA]"
rs = cmd.OpenRecordset( sql )
while not rs.EOF:
Tim Roberts, timr at probo.com
Providenza & Boekelheide, Inc.
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