SqlValidatorScope s = usingScope; while (s instanceof JoinScope) { s = ((JoinScope) s).getUsingScope();
SqlValidatorScope s = usingScope; while (s instanceof JoinScope) { s = ((JoinScope) s).getUsingScope();
SqlValidatorScope s = usingScope; while (s instanceof JoinScope) { s = ((JoinScope) s).getUsingScope();