On Sat, Dec 11, 2010 at 7:07 PM, Wanadoo Hartwig <
hartwig.wiesm...@wanadoo.nl> wrote:
> Hi,
>
> take the following SQL statement:
>
> UPDATE tableA SET column1=(SELECT column2 FROM tableB WHERE
> function1(column3) < 1 ORDER BY function1(column3) LIMIT 1);
>
> Actually, this statement does not make sense because the ORDER BY
> expression does not fulfill the requirements of an ORDER BY expression. I
> wrote it by mistake.
>
> Interestingly SQLite only crashes if function1 is a user supplied function
> (using sqlite3_create_function). I tried the same with the core abs()
> function but then SQLite works.
>
The statement you supply above never generates an OP_Real instruction.
OP_Real is only generated if your statement contains a floating point
literal, which yours does not. Are you user that the UPDATE statement you
are giving above is the statement that is crashing?
> I am using SQLite 3.7.2 and the crash occurs here:
>
> case OP_Real: { /* same as TK_FLOAT, out2-prerelease */
> pOut->flags = MEM_Real;
> assert( !sqlite3IsNaN(*pOp->p4.pReal) ); <-- crashes here because of
> invalid pointer to p4
> pOut->r = *pOp->p4.pReal;
> break;
> }
>
>
> Hartwig
>
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>
--
D. Richard Hipp
d...@sqlite.org
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