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From Mich Talebzadeh <mich.talebza...@gmail.com>
Subject Re: Hive external table not working in sparkSQL when subdirectories are present
Date Tue, 06 Aug 2019 07:33:38 GMT
which versions of Spark and Hive are you using.

what will happen if you use parquet tables instead?

HTH

Dr Mich Talebzadeh



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On Tue, 6 Aug 2019 at 07:58, Rishikesh Gawade <rishikeshg1996@gmail.com>
wrote:

> Hi.
> I have built a Hive external table on top of a directory 'A' which has
> data stored in ORC format. This directory has several subdirectories inside
> it, each of which contains the actual ORC files.
> These subdirectories are actually created by spark jobs which ingest data
> from other sources and write it into this directory.
> I tried creating a table and setting the table properties of the same as
> *hive.mapred.supports.subdirectories=TRUE* and
> *mapred.input.dir.recursive**=TRUE*.
> As a result of this, when i fire the simplest query of *select count(*)
> from ExtTable* via the Hive CLI, it successfully gives me the expected
> count of records in the table.
> However, when i fire the same query via sparkSQL, i get count = 0.
>
> I think the sparkSQL isn't able to descend into the subdirectories for
> getting the data while hive is able to do so.
> Are there any configurations needed to be set on the spark side so that
> this works as it does via hive cli?
> I am using Spark on YARN.
>
> Thanks,
> Rishikesh
>
> Tags: subdirectories, subdirectory, recursive, recursion, hive external
> table, orc, sparksql, yarn
>

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