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https://issues.apache.org/jira/browse/DRILL-6381?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16643325#comment-16643325
]
ASF GitHub Bot commented on DRILL-6381:
---------------------------------------
vdiravka commented on a change in pull request #1466: DRILL-6381: Add support
for index based planning and execution
URL: https://github.com/apache/drill/pull/1466#discussion_r223660467
##########
File path:
contrib/format-maprdb/src/test/java/com/mapr/drill/maprdb/tests/index/LargeTableGenBase.java
##########
@@ -0,0 +1,186 @@
+/*
+ * 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 com.mapr.drill.maprdb.tests.index;
+
+import org.apache.commons.lang3.RandomStringUtils;
+
+import java.util.ArrayList;
+import java.util.Iterator;
+import java.util.LinkedHashSet;
+import java.util.List;
+import java.util.Random;
+import java.util.Set;
+
+public class LargeTableGenBase {
+
+ private boolean dict_ready = false;
+
+ protected List<String> firstnames;
+ protected List<String> lastnames;
+ protected List<String[]> cities;
+ protected int[] randomized;
+
+ protected synchronized void initDictionary() {
+ initDictionaryWithRand();
+ }
+
+ protected void initDictionaryWithRand() {
+ {
+ firstnames = new ArrayList<>();
+ lastnames = new ArrayList<>();
+ cities = new ArrayList<>();
+ List<String> states = new ArrayList<>();
+
+ int fnNum = 2000; //2k
+ int lnNum = 200000;//200k
+ int cityNum = 10000;//10k
+ int stateNum = 50;
+ Random rand = new Random(2017);
+ int i;
+ try {
+ Set<String> strSet = new LinkedHashSet<>();
+ while(strSet.size() < stateNum) {
+ strSet.add(RandomStringUtils.random(2, 0, 0, true, false, null,
rand));
+ }
+ states.addAll(strSet);
+
+ strSet = new LinkedHashSet<>();
+ while(strSet.size() < cityNum) {
+ int len = 3 + strSet.size() % 6;
+ strSet.add(RandomStringUtils.random(len, 0, 0, true, false, null,
rand));
+ }
+
+ Iterator<String> it = strSet.iterator();
+ for(i=0; i<cityNum; ++i) {
Review comment:
add space
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> Add capability to do index based planning and execution
> -------------------------------------------------------
>
> Key: DRILL-6381
> URL: https://issues.apache.org/jira/browse/DRILL-6381
> Project: Apache Drill
> Issue Type: New Feature
> Components: Execution - Relational Operators, Query Planning &
> Optimization
> Reporter: Aman Sinha
> Assignee: Aman Sinha
> Priority: Major
> Fix For: 1.15.0
>
>
> If the underlying data source supports indexes (primary and secondary
> indexes), Drill should leverage those during planning and execution in order
> to improve query performance.
> On the planning side, Drill planner should be enhanced to provide an
> abstraction layer which express the index metadata and statistics. Further,
> a cost-based index selection is needed to decide which index(es) are
> suitable.
> On the execution side, appropriate operator enhancements would be needed to
> handle different categories of indexes such as covering, non-covering
> indexes, taking into consideration the index data may not be co-located with
> the primary table, i.e a global index.
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