I get an OperationalError trying to use tuple_ and in_ in a query with
a
Sqlite db.
This is the query (select the distinct "id_acq - id_centr" couples not
already present in another table)
query = model.Session.query(
Dato.id_elab, Acquisizione.id_centr)\
.filter(Dato.id_acq==Acquisizione.id_acq)\
.distinct()\
.filter(~tuple_(Dato.id_elab, Acquisizione.id_centr)\
.in_(select([Sensore.id_elab, Sensore.id_centr])))
I get this error:
OperationalError: (OperationalError) near ",": syntax error
u'SELECT DISTINCT dati.id_elab AS dati_id_elab, acquisizioni.id_centr
AS acquisizioni_id_centr
FROM dati, acquisizioni
WHERE dati.id_acq = acquisizioni.id_acq AND (dati.id_elab,
acquisizioni.id_centr) NOT IN
(SELECT sensori.id_elab, sensori.id_centr FROM sensori)' ()
I guess the ',' cited in error is the one on the 3rd row
Now I wonder if it's a Sqlite limitation, the SQL string seems correct
to me.
Any advice?
Thanks for your support
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