sqlite3, OperationalError: no such column, shouldn't that ne a ProgrammingError?

John Machin sjmachin at lexicon.net
Fri Jun 19 17:30:31 CEST 2009


On Jun 19, 8:20 pm, Gerhard Häring <g... at ghaering.de> wrote:
> Gabriel Rossetti wrote:
> > Hello everyone,
>
> > I get an OperationalError with sqlite3 if I put the wrong column name,
> > but shouldn't that be a ProgrammingError instead? I read PEP 249 and it
> > says :
>
> > "        OperationalError
> >                    Exception raised for errors that are related to the
> >            database's operation and not necessarily under the control
> >            of the programmer, e.g. an unexpected disconnect occurs,
> >            the data source name is not found, a transaction could not
> >            be processed, a memory allocation error occurred during
> >            processing, etc.  It must be a subclass of DatabaseError.
> >                  ProgrammingError
> >                    Exception raised for programming errors, e.g. table not
> >            found or already exists, syntax error in the SQL
> >            statement, wrong number of parameters specified, etc.  It
> >            must be a subclass of DatabaseError.
> > "
>
> > and to me it sounds more like a programming error than an operational
> > error.
>
> I agree. But I can't help you there.
>
> See _pysqlite_seterror() athttp://oss.itsystementwicklung.de/trac/pysqlite/browser/src/util.c
>
> What I do is map SQLite error codes to DB-API exceptions. And SQLite
> reports your error as generic SQLITE_ERROR, which is mapped to
> OperationalError.

Hi Gerhard,

In http://www.sqlite.org/c3ref/prepare.html it says """When an error
occurs, sqlite3_step() will return one of the detailed error codes or
extended error codes. The legacy behavior was that sqlite3_step()
would only return a generic SQLITE_ERROR result code and you would
have to make a second call to sqlite3_reset() in order to find the
underlying cause of the problem. With the "v2" prepare interfaces, the
underlying reason for the error is returned immediately."""

Are you using sqlite3_prepare() or sqlite3_prepare_v2()?
sqlite3_errcode() or sqlite3_extended_errcode()?

Cheers,
John



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