Hmm, this one has me stumped. As best I can tell after poking at it using
the column_reflect event, a custom dialect, etc. - the issue here is that
in pysqlite.py we (in my Python 3.3 install) are selecting `sqlite3.dbapi2`
as the dbapi interface, but we aren't telling sqlite3 anything about how to
treat unicode errors. From what I am reading (but it seems inconsistent,
maybe?) sqlite3 automatically decodes all database retrieved values from
their bytes for text fields, returning unicode strings. Except... that
doesn't always seem to be true. I hex-edited a db file to change the utf-8
string "hello" to "hell" + 0x92 and sqlite3 switched from returning "hello"
to b"hell\x92", or something like that - I've been poking at this for so
long I've lost track of that transcript.
One can override sqlite3's text factory, apparently, with (for instance)
`sqlite3.text_factory = lambda x: x.decode('utf-8', errors='ignore')`.
Maybe the key is to try and find a way to trigger that from sqlalchemy? I
tried and failed, maybe someone else can point me back to the path?
Just to re-summarize the problem: In python 3, I'm getting errors trying to
read a row from a sqlite database that has a TEXT column with an invalid
utf-8 sequence (specifically, the singleton bye '0x92'). I'd love to just
have sqlalchemy move along and ignore the byte, but I'm not clear how to do
that.
On Tuesday, February 4, 2014 4:33:46 AM UTC-8, Simon King wrote:
>
> I've not done much with reflection, but perhaps you could use the
> column_reflect event:
<snip>
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