[jira] [Created] (SPARK-7939) Make URL partition recognition return String by default for all partition column values

["Jianshi Huang (JIRA)" <ji...@apache.org>]

Jianshi Huang created SPARK-7939:
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             Summary: Make URL partition recognition return String by default for all partition column values
                 Key: SPARK-7939
                 URL: https://issues.apache.org/jira/browse/SPARK-7939
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 1.4.0
            Reporter: Jianshi Huang


Imagine the following HDFS paths:

/data/split=00
/data/split=01
...
/data/split=FF

If I have less than or equal to 10 partitions (00, 01, ... 09), currently partition recognition will treat column 'split' as integer column. 

If I have more than 10 partitions, column 'split' will be recognized as String...

This is very confusing. *So I'm suggesting to treat partition columns as String by default*, and allow user to specify types if needed.

Another example is date:
/data/date=2015-04-01 => 'date' is String
/data/date=20150401 => 'date' is Int

Jianshi



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