Thank you. it works now.
But what is the difference between
from sqlalchemy.sql.expression import func
and
from sqlalchemy import func
the second import is what I found out while experimenting with the query
and after I saw your reply, I tried your code and both works the same.
On 08-03-2012 12:39, Robert Forkel wrote:
sqlalchemy.sql.expression.func may work for this:
from sqlalchemy.sql.expression import func
...
q_doc.filter(func.substring(model.Doc.FileNameStr, 22, 1)==search_str)
...
2012/3/8 Timuçin Kızılay<t...@savaskarsitlari.org>:
I have a query contains SUBSTRING in where clause:
Select top 100 * from _Doc
where SUBSTRING(_Doc.FileNameStr, 22, 1) = '2'
---
This query runs on mssql but I need to use that query from sa.
I could not find anything like this in SA documentatin.
Here is what I tried so far:
q_doc = dbsession.query(model.Doc)
q_doc = q_doc.filter(model.Doc.DocID>= ilk).filter(model.Doc.DocID<=
son)
q_doc = q_doc.filter(model.Doc.FileNameStr[21] == search_str)
q_doc = q_doc.order_by(model.Doc.DocID)
of course, that gives errors.
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