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https://issues.apache.org/jira/browse/SPARK-26663?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16753218#comment-16753218
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Dongjoon Hyun commented on SPARK-26663:
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I'm closing this issue as `Cannot Reproduce`. It may depend on your environment.
> Cannot query a Hive table with subdirectories
> ---------------------------------------------
>
> Key: SPARK-26663
> URL: https://issues.apache.org/jira/browse/SPARK-26663
> Project: Spark
> Issue Type: Bug
> Components: SQL
> Affects Versions: 2.4.0
> Reporter: Aäron
> Priority: Major
>
> Hello,
>
> I want to report the following issue (my first one :) )
> When I create a table in Hive based on a union all then Spark 2.4 is unable
> to query this table.
> To reproduce:
> *Hive 1.2.1*
> {code:java}
> hive> creat table a(id int);
> insert into a values(1);
> hive> creat table b(id int);
> insert into b values(2);
> hive> create table c(id int) as select id from a union all select id from b;
> {code}
>
> *Spark 2.3.1*
>
> {code:java}
> scala> spark.table("c").show
> +---+
> | id|
> +---+
> | 1|
> | 2|
> +---+
> scala> spark.table("c").count
> res5: Long = 2
> {code}
>
> *Spark 2.4.0*
> {code:java}
> scala> spark.table("c").show
> 19/01/18 17:00:49 WARN HiveMetastoreCatalog: Unable to infer schema for table
> perftest_be.c from file format ORC (inference mode: INFER_AND_SAVE). Using
> metastore schema.
> +---+
> | id|
> +---+
> +---+
> scala> spark.table("c").count
> res3: Long = 0
> {code}
> I did not find an existing issue for this. Might be important to investigate.
>
> +Extra info:+ Spark 2.3.1 and 2.4.0 use the same spark-defaults.conf.
>
> Kind regards.
>
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