On Thu, Jan 19, 2017 at 5:53 PM, valeriof <valerio_farrug...@hotmail.com> wrote:
> This may come from my lack of experience with Postgres, but I'm trying to
> extract the byte portion of a Datum that is of type VarBit - bit/bit(n). I
> see that the Datum pointer contains the value content of the bytes (after a
> few bytes for the header) but I would need to point to the actual value
> (plus also the number of bytes to be picked up).
> I currently have a similar issue with BYTEAOID columns. I have a Datum
> pointer but can't get the actual content.
If you have not looked at DatumGetVarBitP() and DatumGetByteaP(), that
will get you corresponding structure pointers from a Datum. Then check
src/backend/utils/adt/varbit.c and bytea_* functions from
src/backend/utils/adt/varlena.c to understand how those structures are
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