[GitHub] [carbondata] Indhumathi27 commented on a change in pull request #3720: [CARBONDATA-3775] Update materialized view document

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[GitHub] [carbondata] Indhumathi27 commented on a change in pull request #3720: [CARBONDATA-3775] Update materialized view document

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Indhumathi27 commented on a change in pull request #3720:
URL: https://github.com/apache/carbondata/pull/3720#discussion_r412846227



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File path: docs/mv-guide.md
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@@ -0,0 +1,342 @@
+<!--
+    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
+
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+    distributed under the License is distributed on an "AS IS" BASIS,
+    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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+-->
+
+# CarbonData Materialized View
+
+* [Quick Example](#quick-example)
+* [Introduction](#introduction)
+* [Loading Data](#loading-data)
+* [Querying Data](#querying-data)
+* [Compaction](#compacting)
+* [Data Management](#data-management)
+* [Time Series Support](#time-series-support)
+* [Time Series RollUp Support](#time-series-rollup-support)
+
+## Quick example
+
+ Start spark-sql in terminal and run the following queries,
+
+   ```
+     CREATE TABLE maintable(a int, b string, c int) stored as carbondata;
+     INSERT INTO maintable SELECT 1, 'ab', 2;
+     CREATE MATERIALIZED VIEW view1 AS SELECT a, sum(b) FROM maintable GROUP BY a;
+     SELECT a, sum(b) FROM maintable GROUP BY a;
+     // NOTE: run explain query and check if query hits the Index table from the plan
+     EXPLAIN SELECT a, sum(b) FROM maintable GROUP BY a;
+   ```
+
+## Introduction
+
+ Materialized views are created as sub-queries. User can create limitless materialized view to

Review comment:
       then, would be `Materialized views are created as carbon tables from select queries.`




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