@API(help="Array of Column Summaries.") Inspect2.ColSummary cols[];
@Override protected Response serve() {
if( str == null ) return RequestServer._http404.serve();
Exception e;
try {
<BUG>Frame fr = water.exec.Exec2.exec(str);
key = Key.make(".Last.value");</BUG>
UKV.remove(key);
UKV.put(key,fr);
num_rows = fr.numRows();

@API(help="Array of Column Summaries.") Inspect2.ColSummary cols[];
@Override protected Response serve() {
if( str == null ) return RequestServer._http404.serve();
Exception e;
try {
Frame fr = water.exec.Exec2.exec(str);
if( fr == null ) throw new IllegalArgumentException("Null return from Exec2?");
key = Key.make(".Last.value");
UKV.remove(key);
UKV.put(key,fr);
num_rows = fr.numRows();
