[jira] [Commented] (CARBONDATA-284) Abstracting Index and Segment interface

[Akash R Nilugal (Jira)]

    [ https://issues.apache.org/jira/browse/CARBONDATA-284?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15614265#comment-15614265 ]

ASF GitHub Bot commented on CARBONDATA-284:
-------------------------------------------

Github user ravipesala commented on a diff in the pull request:

    https://github.com/apache/incubator-carbondata/pull/208#discussion_r85470691
 
    --- Diff: hadoop/src/main/java/org/apache/carbondata/hadoop/api/CarbonTableInputFormat.java ---
    @@ -0,0 +1,169 @@
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    + * or more contributor license agreements.  See the NOTICE file
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    +
    +package org.apache.carbondata.hadoop.api;
    +
    +import java.io.IOException;
    +import java.util.LinkedList;
    +import java.util.List;
    +
    +import org.apache.carbondata.hadoop.CarbonProjection;
    +import org.apache.carbondata.hadoop.internal.CarbonInputSplit;
    +import org.apache.carbondata.hadoop.internal.segment.Segment;
    +import org.apache.carbondata.hadoop.internal.segment.SegmentManager;
    +import org.apache.carbondata.hadoop.util.CarbonInputFormatUtil;
    +import org.apache.carbondata.hadoop.util.ObjectSerializationUtil;
    +import org.apache.carbondata.scan.expression.Expression;
    +import org.apache.carbondata.scan.filter.resolver.FilterResolverIntf;
    +import org.apache.hadoop.conf.Configuration;
    +import org.apache.hadoop.mapreduce.InputSplit;
    +import org.apache.hadoop.mapreduce.JobContext;
    +import org.apache.hadoop.mapreduce.RecordReader;
    +import org.apache.hadoop.mapreduce.TaskAttemptContext;
    +import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
    +
    +/**
    + * Input format of CarbonData file.
    + * @param <T>
    + */
    +public class CarbonTableInputFormat<T> extends FileInputFormat<Void, T> {
    +
    +  private static final String FILTER_PREDICATE =
    +      "mapreduce.input.carboninputformat.filter.predicate";
    +
    +  private SegmentManager segmentManager;
    +
    +  public CarbonTableInputFormat(SegmentManager segmentManager) {
    +    this.segmentManager = segmentManager;
    +  }
    +
    +  @Override
    +  public RecordReader<Void, T> createRecordReader(InputSplit split,
    +      TaskAttemptContext context) throws IOException, InterruptedException {
    +    switch (((CarbonInputSplit)split).formatType()) {
    --- End diff --
   
    ok

> Abstracting Index and Segment interface
> ---------------------------------------
>
>                 Key: CARBONDATA-284
>                 URL: https://issues.apache.org/jira/browse/CARBONDATA-284
>             Project: CarbonData
>          Issue Type: Improvement
>          Components: hadoop-integration
>    Affects Versions: 0.1.0-incubating
>            Reporter: Jacky Li
>             Fix For: 0.3.0-incubating
>
>
> This issue is intended to abstract developer API and user API to achieve following goals:
> Goal 1: User can choose the place to store Index data, it can be stored in
> processing framework's memory space (like in spark driver memory) or in
> another service outside of the processing framework (like using a
> independent database service, which can be shared across client)
> Goal 2: Developer can add more index of his choice to CarbonData files.
> Besides B+ tree on multi-dimensional key which current CarbonData supports,
> developers are free to add other indexing technology to make certain
> workload faster. These new indices should be added in a pluggable way.
> This Jira has been discussed in maillist:
> http://apache-carbondata-mailing-list-archive.1130556.n5.nabble.com/Abstracting-CarbonData-s-Index-Interface-td1587.html

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