raunaqmorarka commented on code in PR #216:
URL: https://github.com/apache/parquet-format/pull/216#discussion_r1333328796
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src/main/thrift/parquet.thrift:
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@@ -216,7 +216,12 @@ struct Statistics {
/** count of distinct values occurring */
4: optional i64 distinct_count;
/**
- * Min and max values for the column, determined by its ColumnOrder.
+ * lower and upper bound values for the column, determined by its
ColumnOrder.
Review Comment:
Given the feature in https://issues.apache.org/jira/browse/PARQUET-1685, I
want to assume that all existing stats are truncated. Going forward we should
have a flag to explicitly indicate whether or not truncation took place and
applications should perform aggregation pushdown only if that flag is found to
indicate no truncation. But I think adding that flag can be tackled separately
as a follow-up.
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