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com.nvidia.spark

RapidsUDF

trait RapidsUDF extends AnyRef

A RAPIDS accelerated version of a user-defined function (UDF).

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  8. def evaluateColumnar(numRows: Int, args: <repeated...>[ColumnVector]): ColumnVector

    Evaluate a user-defined function with RAPIDS cuDF columnar inputs producing a cuDF column as output.

    Evaluate a user-defined function with RAPIDS cuDF columnar inputs producing a cuDF column as output. The method must return a column of the appropriate type that corresponds to the type returned by the CPU implementation of the UDF (e.g.: INT32 for int, FLOAT64 for double, STRING for String, etc) or a runtime exception will occur when the results are marshalled into the expected Spark result type for the UDF. The number of rows of output must match the number of rows specified, and all input columns must have that same number of rows.

    Note that the inputs should NOT be closed by this method, as they will be closed by the caller. This method must close any intermediate cuDF results produced during the computation (e.g.: Table, ColumnVector or Scalar instances).

    numRows

    number of rows of output to return

    args

    columnar inputs to the UDF that will be closed by the caller and should not be closed within this method.

    returns

    columnar output from the user-defined function

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  1. def evaluateColumnar(args: <repeated...>[ColumnVector]): ColumnVector

    Evaluate a user-defined function with RAPIDS cuDF columnar inputs producing a cuDF column as output.

    Evaluate a user-defined function with RAPIDS cuDF columnar inputs producing a cuDF column as output. The method must return a column of the appropriate type that corresponds to the type returned by the CPU implementation of the UDF (e.g.: INT32 for int, FLOAT64 for double, STRING for String, etc) or a runtime exception will occur when the results are marshalled into the expected Spark result type for the UDF. The number of rows of output must match the number of rows for the input arguments, which will all have the same row count.

    Note that the inputs should NOT be closed by this method, as they will be closed by the caller. This method must close any intermediate cuDF results produced during the computation (e.g.: Table, ColumnVector or Scalar instances).

    args

    columnar inputs to the UDF that will be closed by the caller and should not be closed within this method.

    returns

    columnar output from the user-defined function

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