Gregory Stark <[EMAIL PROTECTED]> writes: > Martijn van Oosterhout <kleptog@svana.org> writes: > >> So you end up storing the typmod in the Datum itself, which brings you >> right back to varlena. > > Not really since the Datum doesn't actually end up on disk in the case of > pass-by-reference.
Just brain storming here. But what happens if we make Datum 2*sizeof(pointer) and stored the typmod and/or attlen in it? Obviously it means the memory use goes up dramatically. But the disk i/o could potentially be reduced dramatically as well. Does it let us do anything else we've been dreaming of but not thought doable? Does it cause any fundamental problems? -- Gregory Stark EnterpriseDB http://www.enterprisedb.com ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
