/**
* Copyright 2014 Yahoo! Inc. Licensed under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance with the License.
* You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
* Unless required by applicable law or agreed to in writing, software distributed
* under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR
* CONDITIONS OF ANY KIND, either express or implied. See the License for the
* specific language governing permissions and limitations under the License.
* See accompanying LICENSE file.
*/
package com.yahoo.sql4d.query;
import com.yahoo.sql4d.query.timeseries.TimeSeriesQueryMeta;
/**
* Group by and timeseries are same(when grouping by timestamp we can hint as hint('timeseries')
* so that the query is interpreted as timeseries by the compiler as well as druid
* however technically this is not needed as druid still returns data considering
* the query as groupby which may be inefficient.
* @author srikalyan
*/
public class HintProcessor {
private static final String TS = "timeseries";
public static QueryMeta process(QueryMeta qMeta, String hint) {
hint = hint.replaceAll("'", "");
switch (hint.toLowerCase()) {
case TS:
return TimeSeriesQueryMeta.promote(qMeta);
default:
break;
}
return qMeta;
}
}