[Interest] Qt Sql BLOB data converting

Yauheni Pervenenka yauheni.pervenenka at viber.com
Mon Nov 28 19:46:49 CET 2022


Christian, thanks for your effort, db was simplified for test, is it
possible to fix it on the client side? Any ideas, why is column considered
as SQLITE_TEXT if it is BLOB?

On Mon, Nov 28, 2022 at 9:40 PM Christian Ehrlicher <Ch.Ehrlicher at gmx.de>
wrote:

>
> Am 28.11.2022 um 19:16 schrieb Yauheni Pervenenka via Interest:
> > Thiago, hello, thanks for your reply, sorry have no instructions for
> > create and insert, but have data base with one value which can't be
> > parsed correct(db is cut to one value for provide example)
> >
> > https://bugreports.qt.io/browse/QTBUG-108992
> >
> Your database looks strange to me - even though your column type
> according to the schema is BLOB:
>
> sqlite> .schema
> CREATE TABLE IF NOT EXISTS "test" (
>          "value" BLOB NOT NULL
> );
>
> the return value of sqlite3_column_type() is SQLITE_TEXT (3).
>
> Therefore the return value is treated as string and the data is screwed
> up. If I change the return value to SQLITE_BLOB (4) in the debugger, all
> is correct:
>
> qDebug() << value.toByteArray().toHex();
>
> -->
>
> "763130492d46ab4c9c7bb0e9789b29c3ab1e4723dea6c8e5d2f9b266a275e1fbe4a6"
>
>
>
> Christian
>
>
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