Weizhong commented on CARBONDATA-1030:

We can add mapreduce.input.carboninputformat.segmentnumbers on mapred-site.xml, 
so that we can query from specified segments

> Support reading specified segment or carbondata file
> ----------------------------------------------------
>                 Key: CARBONDATA-1030
>                 URL: https://issues.apache.org/jira/browse/CARBONDATA-1030
>             Project: CarbonData
>          Issue Type: Improvement
>            Reporter: Jin Zhou
>            Priority: Minor
> We can query whole table in SQL way currently, but reading specified segments 
> or data files is useful in some scenarios such as incremental data processing.

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