[jira] [Created] (DRILL-4615) Support directory names in schema

["Jesse Yates (JIRA)" <ji...@apache.org>]

Jesse Yates created DRILL-4615:
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             Summary: Support directory names in schema
                 Key: DRILL-4615
                 URL: https://issues.apache.org/jira/browse/DRILL-4615
             Project: Apache Drill
          Issue Type: Improvement
            Reporter: Jesse Yates


In Spark, partitioned parquet output is written with directories like:
{code}
/column1=1
  /column2=hello
     /data.parquet
  /column2=world
     /moredata.parquet
/column1=2
{code}
However, when querying these files with Drill we end up interpreting the directories as strings when what they really are is column names + values. In the data files we only have the remaining columns. Querying this with drill means that you can really only have a couple of data types (far short of what spark/parquet supports) in the column and still have correct operations.

Given the size of the data, I don't want to have to CTAS all the parquet files (especially as they are being periodically updated). 

I think this ends up being a nice addition for general file directory reads as well since many people already encode meaning into their directory structure, but having self describing directories is even better.



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