Hi,
Zoltan Boszormenyi írta:
Hi,
Martijn van Oosterhout írta:
On Thu, Dec 07, 2006 at 01:40:22PM +0100, Zoltan Boszormenyi wrote:
text_in() doesn't exists, it's textin() but I have to call it through
DirectFunctionCall1(), like this:
yeardatum = DirectFunctionCall1(textin, CStringGetDatum("year"));
However, the session crashes on the subsequent
returndatum = DirectFunctionCall2(timestamp_part, yeardatum, timest);
It would be a good idea to actually find out where it crashes, that
would help you work out what the actual problem is. Just looking at the
code you posted, I only see this other bit that looks a bit suspect:
Datum timest;
bool isnull;
t = PG_GETARG_HEAPTUPLEHEADER(0);
timest = DatumGetTimestamp(GetAttributeByName(t, "ts_today",
&isnull));
You're calling DatumGetTimestamp() which would return a timestamp
(probably some structure) but you're storing it in a Datum. Just take
the result of GetAttributeByName directly.
Thanks, that worked for me.
I have just one more question:
How can I get an Oid out of a Datum, i.e.
how do I know what type I get in a given Datum?
DatumGetObjectId() seems to give me an Oid that
was specifically stored as a Datum.
I have found the alternative solution.
If t is HeapTupleHeader then:
Oid tupType;
int32 tupTypmod;
TupleDesc tupDesc;
tupType = HeapTupleHeaderGetTypeId(t);
tupTypmod = HeapTupleHeaderGetTypMod(t);
tupDesc = lookup_rowtype_tupdesc(tupType, tupTypmod);
will give me the needed TupleDesc and I can use SPI_gettypeid().
Thanks and best regards,
Zoltán
