Github user chenliang613 commented on a diff in the pull request:
https://github.com/apache/carbondata/pull/2693#discussion_r215881276
--- Diff: docs/datamap-developer-guide.md ---
@@ -3,14 +3,28 @@
### 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 2 types of DataMap supported:
-1. IndexDataMap: DataMap that leveraging index to accelerate filter query
-2. MVDataMap: DataMap that leveraging Materialized View to accelerate olap
style query, like SPJG query (select, predicate, join, groupby)
+1. IndexDataMap: DataMap that leverages index to accelerate filter query
+2. MVDataMap: DataMap that leverages Materialized View to accelerate olap
style query, like SPJG query (select, predicate, join, groupby)
### DataMap provider
When user issues `CREATE DATAMAP dm ON TABLE main USING 'provider'`, the
corresponding DataMapProvider implementation will be created and initialized.
Currently, the provider string can be:
-1. preaggregate: one type of MVDataMap that do pre-aggregate of single
table
-2. timeseries: one type of MVDataMap that do pre-aggregate based on time
dimension of the table
+1. preaggregate: A type of MVDataMap that do pre-aggregate of single table
+2. timeseries: A type of MVDataMap that do pre-aggregate based on time
dimension of the table
3. class name IndexDataMapFactory implementation: Developer can implement
new type of IndexDataMap by extending IndexDataMapFactory
-When user issues `DROP DATAMAP dm ON TABLE main`, the corresponding
DataMapProvider interface will be called.
\ No newline at end of file
+When user issues `DROP DATAMAP dm ON TABLE main`, the corresponding
DataMapProvider interface will be called.
+
+Details about [DataMap
Management](./datamap-management.md#datamap-management) and supported
[DSL](./datamap-management.md#overview) are documented
[here](./datamap-management.md).
--- End diff --
this link is not working.
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