@Override
public void plan(final FElem plan) {
final FElem e = planElem();
var.plan(e);
expr.plan(e);
plan.add(e);
}
@Override
public String toString() {
final TokenBuilder tb = new TokenBuilder().add(var.toString()).add(' ').add(ASSIGN);
tb.add(' ').add(expr.toString());
if (coll != null) tb.add(' ').add(COLLATION).add(" \"").add(coll.uri()).add('"');
return tb.toString();
}
@Override
public Count optimize(final QueryContext qc, final VarScope scp) throws QueryException {
var.refineType(SeqType.ITR, qc, info);
return this;
}