=?ISO-8859-15?Q?Yves_Wei=DFig?= <weis...@rbg.informatik.tu-darmstadt.de> writes: > Am 27.04.2011 16:11, schrieb Heikki Linnakangas: >> What kind of a Datum do you want it to be? What data type? See >> CStringGetDatum, or perhaps CStringGetTextDatum(). Or perhaps you want >> to call the input function of some other datatype, with InputFunctionCall.
> Ok, but how do I do that? > Currently I am using: > _ebi_mtab_insert(rel, CStringGetTextDatum(BVEC_NULL), bin_enc); > This function does not mere than hashing the 2nd passed argument (with > the internal hash functions of hash.c) but each time a different hash > value is returned, so I am thinking I might pass a pointer and not the > real Datum. I am highly irritated now... as for now I thought I > understood Datum... Well, it's hard to say for sure when you haven't shown us either what BVEC_NULL means or what _ebi_mtab_insert is doing with the value it gets ... but in fact a text Datum *is* a pointer, as is the Datum value for any other pass-by-reference type. Datum isn't magic, it's only a pointer-sized integer type. For anything bigger than that, the Datum value is a pointer to some data somewhere else. regards, tom lane -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers