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org.apache.spark.sql.execution.datasources

AggregatePushDownUtils

object AggregatePushDownUtils

Utility class for aggregate push down to Parquet and ORC.

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  6. def convertAggregatesRowToBatch(aggregatesAsRow: InternalRow, aggregatesSchema: StructType, offHeap: Boolean): ColumnarBatch

    Convert the aggregates result from InternalRow to ColumnarBatch.

    Convert the aggregates result from InternalRow to ColumnarBatch. This is used for columnar reader.

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  9. def equivalentAggregations(a: Aggregation, b: Aggregation): Boolean

    Check if two Aggregation a and b is equal or not.

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  12. def getSchemaForPushedAggregation(aggregation: Aggregation, schema: StructType, partitionNames: Set[String], dataFilters: Seq[Expression]): Option[StructType]

    Get the data schema for aggregate to be pushed down.

  13. def getSchemaWithoutGroupingExpression(aggSchema: StructType, aggregation: Aggregation): StructType

    Return the schema for aggregates only (exclude group by columns)

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  19. def reOrderPartitionCol(partitionSchema: StructType, aggregation: Aggregation, partitionValues: InternalRow): InternalRow

    Reorder partition cols if they are not in the same order as group by columns

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