/**
* It submits a query statement and get a response. The main difference from {@link
* #executeQuery(String)} is a blocking method. So, this method is wait for the finish of the
* submitted query.
*
* @return If failed, return null.
*/
public ResultSet executeQueryAndGetResult(String tql) throws ServiceException, IOException {
QueryRequest.Builder builder = QueryRequest.newBuilder();
builder.setQuery(tql);
SubmitQueryRespose response = service.submitQuery(null, builder.build());
QueryId queryId = new QueryId(response.getQueryId());
if (queryId.equals(TajoIdUtils.NullQueryId)) {
return null;
}
return getQueryResultAndWait(queryId);
}
/**
* It submits a query statement and get a response immediately. The response only contains a query
* id, and submission status. In order to get the result, you should use {@link
* #getQueryResult(tajo.QueryId)} or {@link #getQueryResultAndWait(tajo.QueryId)}.
*/
public SubmitQueryRespose executeQuery(String tql) throws ServiceException {
QueryRequest.Builder builder = QueryRequest.newBuilder();
builder.setQuery(tql);
return service.submitQuery(null, builder.build());
}