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org.apache.sedona.viz.sql.operator

AggregateWithinPartitons

object AggregateWithinPartitons

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  4. def apply(dataFrame: DataFrame, keyCol: String, valueCol: String, aggFunc: String): DataFrame

    Run aggregation within each partition without incurring a data shuffle.

    Run aggregation within each partition without incurring a data shuffle. Currently support three aggregates, sum, count, avg. If the aggregate func is count, this function doesn't require a value column. If the aggregate func is sum and avg, it will require a value column. They are same as the regular aggregation SQL

    SELECT pixel, COUNT(*) FROM t GROUP BY pixel

    SELECT pixel, AVG(weight) FROM t GROUP BY pixel

    SELECT pixel, AVG(weight) FROM t GROUP BY pixel

    keyCol

    GroupBy key

    valueCol

    Aggregate value

    aggFunc

    Aggregate function

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