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From "Kapil Singh (JIRA)" <j...@apache.org>
Subject [jira] [Created] (SPARK-16892) flatten function to get flat array (or map) column from array of array (or array of map) column
Date Thu, 04 Aug 2016 08:52:20 GMT
Kapil Singh created SPARK-16892:
-----------------------------------

             Summary: flatten function to get flat array (or map) column from array of array
(or array of map) column
                 Key: SPARK-16892
                 URL: https://issues.apache.org/jira/browse/SPARK-16892
             Project: Spark
          Issue Type: New Feature
          Components: SQL
            Reporter: Kapil Singh


flatten(input)

Converts input of array of array type into flat array type by inserting elements of all element
arrays into single array. Example:
input: [[1, 2, 3], [4, 5], [-1, -2, 0]]
output: [1, 2, 3, 4, 5, -1, -2, 0]

Converts input of array of map type into flat map type by inserting key-value pairs of all
element maps into single map. Example:
input: [(1 -> "one", 2 -> "two"), (0 -> "zero"), (4 -> "four")]
output: (1 -> "one", 2 -> "two", 0 -> "zero", 4 -> "four")



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