Github user arina-ielchiieva commented on a diff in the pull request:
https://github.com/apache/drill/pull/774#discussion_r147583342
--- Diff:
contrib/storage-opentsdb/src/main/java/org/apache/drill/exec/store/openTSDB/client/query/DBQuery.java
---
@@ -0,0 +1,108 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements. See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership. The ASF licenses this file
+ * to you 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.
+ */
+package org.apache.drill.exec.store.openTSDB.client.query;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import static org.apache.drill.exec.store.openTSDB.Constants.DEFAULT_TIME;
+
+/**
+ * DBQuery is an abstraction of an openTSDB query,
+ * that used for extracting data from the storage system by POST request
to DB.
+ * <p>
+ * An OpenTSDB query requires at least one sub query,
+ * a means of selecting which time series should be included in the result
set.
+ */
+public class DBQuery {
+
+ /**
+ * The start time for the query. This can be a relative or absolute
timestamp.
+ */
+ private String start;
+ /**
+ * One or more sub subQueries used to select the time series to return.
+ */
+ private Set<Query> queries;
+
+ private DBQuery(Builder builder) {
+ this.start = builder.start;
+ this.queries = builder.queries;
+ }
+
+ public String getStart() {
+ return start;
+ }
+
+ public Set<Query> getQueries() {
+ return queries;
+ }
+
+ public static class Builder {
+
+ private String start = DEFAULT_TIME;
--- End diff --
According to the documentation start time is required parameter, I we
should not use our made up default but rather fail and ask user to provide
start time.
[1] http://opentsdb.net/docs/build/html/api_http/query/index.html
---
