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HIVE-30131: StatsOptimizer: Answer MIN, MAX and COUNT on a DECIMAL column from column statistics - #6844
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…lumn from column statistics - getType mapped a decimal column to StatType.Unsupported, so min, max and count(col) over one scanned the table even with accurate satistics - add StatType.Decimal and the cases its exhaustive switches then require - read the bound through DecimalUtils.getHiveDecimal, as the metastore does - partitioned tables need no fold here: statsFor already aggregates them
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What changes were proposed in this pull request?
Why are the changes needed?
Missing stats optimization for DECIMAL column
Does this PR introduce any user-facing change?
No
How was this patch tested?
metadata_only_queries.q