@Override
public boolean accept(final ASTVisitor visitor) {
if (!visitAll(visitor, specs)) return false;
for (final Expr ng : preExpr) if (!ng.accept(visitor)) return false;
for (final Var ng : post) if (!visitor.declared(ng)) return false;
return true;
}
@Override
public int exprSize() {
int sz = 0;
for (final Expr e : preExpr) sz += e.exprSize();
for (final Expr e : specs) sz += e.exprSize();
return sz;
}
@Override
public GroupBy compile(final QueryContext qc, final VarScope sc) throws QueryException {
for (final Expr e : preExpr) e.compile(qc, sc);
for (final Spec b : specs) b.compile(qc, sc);
return optimize(qc, sc);
}