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    MaxCompute:TRANSFORM

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    MaxCompute:TRANSFORM

    Last Updated:Sep 06, 2023

    Transforms the elements in Array a by using func and returns a new array.

    Syntax

    array<R> transform(array<T> <a>, function<T, R> <func>)

    Parameters

    • a: required. This parameter specifies an array. T in array<T> specifies the data type of the elements in the array. The elements can be of any data type.

    • func: required. This parameter specifies the built-in function, user-defined function, or expression that is used to transform the elements in Array a. The value must be of the same data type as the elements in Array a. R specifies the data type of the output results.

    Return value

    A value of the ARRAY type is returned.

    Examples

    -- The return value is [2, 3, 4]. 
select transform(array(1, 2, 3), x -> x + 1);
    Note

    In this example, the combination of a hyphen and a closing angle bracket (->) is used. For more information about how to use the combination of a hyphen and a closing angle bracket (->) in Lambda functions, see Lambda functions.

    Related functions

    TRANSFORM is a complex type function. For more information about the functions that are used to process data of complex data types, such as ARRAY, MAP, STRUCT, and JSON, see Complex type functions.