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com.linkedin.feathr.offline.job

DataFrameStatFunctions

class DataFrameStatFunctions extends AnyRef

Stat functions for dataframe

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  5. def batchCreateBloomFilter(columnNames: Seq[String], expectedNumItems: Long, fpp: Double): Seq[BloomFilter]

    Batch creating multiple bloomFilters, one for each column.

    Batch creating multiple bloomFilters, one for each column. This is more efficient than using Spark implementation, as this only requires reading input dataset once, while the Spark implementation will read input dataset once per bloomfilter

    columnNames

    column names to create bloomfilters on, e.g when creating bloomfilter for multiple join key combinations such as <x>, <y>, <x, y>

    expectedNumItems

    expected number of distinct item in the dataframe regarding the join key

    fpp

    false positive rate

    returns

    sequence of created bloomfilters

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