This was agreed to back in 2007, but never actually done.
Josh Hansen
if (sv->spl_ldatum_exists || sv->spl_rdatum_exists)
{
- elog(LOG, "picksplit method for column %d of index \"%s\" doesn't support secondary split",
+ elog(DEBUG1, "picksplit method for column %d of index \"%s\" doesn't support secondary split",
attno + 1, RelationGetRelationName(r));
supportSecondarySplit(r, giststate, attno, sv, v->spl_lattr[attno], v->spl_rattr[attno]);