paul-rogers commented on issue #1923: DRILL-7479: Partial fixes for metadata parameterized type issues URL: https://github.com/apache/drill/pull/1923#issuecomment-565141768 Revised the PR with some ideas from DRILL-7479. The `ColumnStatistics` class was made generic: it has no type. `ColumnStatistics` is a metadata description of a column: it, itself, is not a column and does not hold data for the column. It is important that the description describe the column type (which it does via the `type` field). But, the Java type of the metadata description need not reflect the type of the eventual values. (Think of `ColumnMetadata` or `Class` as examples.) The result was that I could revert a number of changes and the resulting code is a bit cleaner. This change should not affect any existing, serialized data for this class.
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