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From "Xiao Li (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-23932) High-order function: zip_with(array<T>, array<U>, function<T, U, R>) → array<R>
Date Mon, 09 Apr 2018 06:54:00 GMT
Xiao Li created SPARK-23932:
-------------------------------

             Summary: High-order function: zip_with(array<T>, array<U>, function<T,
U, R>) → array<R>
                 Key: SPARK-23932
                 URL: https://issues.apache.org/jira/browse/SPARK-23932
             Project: Spark
          Issue Type: Sub-task
          Components: SQL
    Affects Versions: 2.3.0
            Reporter: Xiao Li


Ref: https://prestodb.io/docs/current/functions/array.html

Merges the two given arrays, element-wise, into a single array using function. Both arrays
must be the same length.
{noformat}
SELECT zip_with(ARRAY[1, 3, 5], ARRAY['a', 'b', 'c'], (x, y) -> (y, x)); -- [ROW('a', 1),
ROW('b', 3), ROW('c', 5)]
SELECT zip_with(ARRAY[1, 2], ARRAY[3, 4], (x, y) -> x + y); -- [4, 6]
SELECT zip_with(ARRAY['a', 'b', 'c'], ARRAY['d', 'e', 'f'], (x, y) -> concat(x, y)); --
['ad', 'be', 'cf']
{noformat}




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