Indhumathi27 commented on a change in pull request #3708:
URL:
https://github.com/apache/carbondata/pull/3708#discussion_r411157552##########
File path: docs/index-developer-guide.md
##########
@@ -18,17 +18,18 @@
# Index Developer Guide
### Introduction
-DataMap is a data structure that can be used to accelerate certain query of the table. Different DataMap can be implemented by developers.
-Currently, there are two types of DataMap supported:
-1. IndexDataMap: DataMap that leverages index to accelerate filter query. Lucene DataMap and BloomFiler DataMap belong to this type of DataMaps.
-2. MVDataMap: DataMap that leverages Materialized View to accelerate olap style query, like SPJG query (select, predicate, join, groupby). Preaggregate, timeseries and mv DataMap belong to this type of DataMaps.
+Index is a data structure that can be used to accelerate certain query of the table. Different Index can be implemented by developers.
+Currently, Carbondata supports three types of Indexes:
+1. BloomFilter Index: A space-efficient probabilistic data structure that is used to test whether an element is a member of a set.
+2. Lucene Index: High performance, full-featured text search engine.
+3. Secondary Index: Sencondary index tables to hold blocklets are created as indexes and managed as child tables internally by Carbondata.
### Index Provider
-When user issues `CREATE INDEX index_name ON TABLE main AS 'provider'`, the corresponding DataMapProvider implementation will be created and initialized.
+When user issues `CREATE INDEX index_name ON TABLE main AS 'provider'`, the corresponding IndexProvider implementation will be created and initialized.
Currently, the provider string can be:
-1. class name IndexDataMapFactory implementation: Developer can implement new type of IndexDataMap by extending IndexDataMapFactory
+1. class name IndexFactory implementation: Developer can implement new type of Index by extending IndexFactory
-When user issues `DROP INDEX index_name ON TABLE main`, the corresponding DataMapProvider interface will be called.
+When user issues `DROP INDEX index_name ON TABLE main`, the corresponding IndexProvider interface will be called.
Review comment:
Change to `IndexFactory class` instead of `IndexProvider interface`
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