Re: Problems with the varlena patch in my module - Mailing list pgsql-hackers

Tzahi Fadida <Tzahi.ML@gmail.com> writes:
> This is an excerpt from my code:
> newtset->tids = (bytea *) fastgetattr(tupleTSet, LABELS_ALIGNED, 
> fctx->tupleSetDesc, &isnull);

> It seems that for an empty bytea (only the size of the header), i get that 
> VARSIZE(newtset->tids)==534765440
> instead of VARHDRSZ.

That code has always been broken, you just failed to exercise the
problem before.  There needs to be a detoasting call there, not
merely a cast.  DatumGetByteaP() would probably be appropriate.
        regards, tom lane