benj created DRILL-7319: --------------------------- Summary: Option to request NOT NULL column as NULLABLE column Key: DRILL-7319 URL: https://issues.apache.org/jira/browse/DRILL-7319 Project: Apache Drill Issue Type: Improvement Components: Storage - Parquet Affects Versions: 1.16.0 Reporter: benj
When using different Apache Parquet files in the same request, if the Mode(optional/required) is not the same for certain columns, it can produce some errors. Example: Error: UNSUPPORTED_OPERATION ERROR: Hash aggregate does not support schema change It's very annoying. So why not propose an option that allow to read NOT NULL columns as NULLABLE columns. I imagine that certain optimizations can't be realized in this case but the queries will work without having to take again the datasets -- This message was sent by Atlassian JIRA (v7.6.3#76005)