[jira] [Created] (PARQUET-411) Format: Add a flag when min/max are truncated

["Ryan Blue (JIRA)" <ji...@apache.org>]

Ryan Blue created PARQUET-411:
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             Summary: Format: Add a flag when min/max are truncated
                 Key: PARQUET-411
                 URL: https://issues.apache.org/jira/browse/PARQUET-411
             Project: Parquet
          Issue Type: Bug
          Components: parquet-format
    Affects Versions: format-2.3.1
            Reporter: Ryan Blue


PARQUET-372 drops page and column chunk stats when values are larger than 4k to avoid storing very large values in page headers and the file footer. An alternative approach is to truncate the values, which would still allow filtering on page stats. The problem with truncating values is that the value in stats may not be the true min or max so engines that use these values as the result of aggregations like {{min(col)}} would return incorrect data. We should consider adding metadata to allow truncating values for filtering that captures the fact that the values have been modified.



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