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https://issues.apache.org/jira/browse/HIVE-11245?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14626903#comment-14626903
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Sergey Shelukhin commented on HIVE-11245:
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This is a relatively easy part. I showed it to [~owen.omalley] yesterday; where
ORC used to call "readDiskRanges", new code calls "getDiskRangesFromCache if
(!gotAllRanges) readDiskRanges". It's 10 lines of code... ORC will need to
expose "readDiskRanges" method, or we can c/p it.
> LLAP: Fix the LLAP to ORC APIs
> ------------------------------
>
> Key: HIVE-11245
> URL: https://issues.apache.org/jira/browse/HIVE-11245
> Project: Hive
> Issue Type: Sub-task
> Reporter: Owen O'Malley
> Assignee: Sergey Shelukhin
> Priority: Blocker
>
> Currently the LLAP branch has refactored the ORC code to have different code
> paths depending on whether the data is coming from the cache or a FileSystem.
> We need to introduce a concept of a DataSource that is responsible for
> getting the necessary bytes regardless of whether they are coming from a
> FileSystem, in memory cache, or both.
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