aokolnychyi commented on issue #131: Fix collection of bounds for small decimals in ParquetMetrics URL: https://github.com/apache/incubator-iceberg/pull/131#issuecomment-473393292 @rdblue Let's assume we have `3.50` as Decimal(10, 2), which is represented as INT64 in Parquet. ``` file schema: table -------------------------------------------------------------------------------- decimalCol: OPTIONAL INT64 O:DECIMAL R:0 D:1 row group 1: RC:1 TS:75 OFFSET:4 -------------------------------------------------------------------------------- decimalCol: INT64 GZIP DO:0 FPO:4 SZ:91/75/0.82 VC:1 ENC:BIT_PACKED,PLAIN,RLE ST:[min: 3.50, max: 3.50, num_nulls: 0] ``` Once we read the footer and call `stats.genericGetMin()` for this decimal column, we will get `350`. This value must be properly scaled (handled by `converterFromParquet`) before creating a literal. Right now, `Literals.of((Long) 350).to(DecimalType.of(10, 2)` will give us `350.00` instead of `3.50`.
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