Jackie-Jiang opened a new pull request #6668:
URL: https://github.com/apache/incubator-pinot/pull/6668


   ## Description
   Currently `SumPrecision` aggregation function only supports summing up the 
serialized BigDecimal bytes.
   This PR enhances the `SumPrecision` with:
   - All data type support (INT, LONG, FLOAT, DOUBLE, STRING) to perform exact 
sum
   - Star-tree support (e.g. `SumPrecision__col`)
   
   Other changes:
   - Move the `BigDecimal` related functions into `BigDecimalUtils`
   - Allow creating var-length dictionary for BYTES column


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