@Override
public GroupBy copy(final QueryContext qc, final VarScope scp, final IntObjMap<Var> vs) {
// copy the pre-grouping expressions
final Expr[] pEx = Arr.copyAll(qc, scp, vs, preExpr);
// create fresh copies of the post-grouping variables
final Var[] ps = new Var[post.length];
final int pl = ps.length;
for (int p = 0; p < pl; p++) {
final Var old = post[p];
ps[p] = scp.addCopy(old, qc);
vs.put(old.id, ps[p]);
}
// done
return new GroupBy(Arr.copyAll(qc, scp, vs, specs), pEx, ps, nonOcc, info);
}
public final boolean assertEquals(String $label, char[] $expected, char[] $actual) {
return assertEquals($label, Arr.toString($expected), Arr.toString($actual));
}