[jira] [Created] (SPARK-24636) Type Coercion of Arrays for array_join Function

["Marek Novotny (JIRA)" <ji...@apache.org>]

Marek Novotny created SPARK-24636:
-------------------------------------

             Summary: Type Coercion of Arrays for array_join Function
                 Key: SPARK-24636
                 URL: https://issues.apache.org/jira/browse/SPARK-24636
             Project: Spark
          Issue Type: Improvement
          Components: SQL
    Affects Versions: 2.4.0
            Reporter: Marek Novotny


The description of SPARK-23916 refers to the implementation of {{array_join}} function in Presto. This implementation accepts an arbitrary arrays of primitive types.:

{{presto> SELECT array_join(ARRAY [1, 2, 3], ', ');}}
 {{_col0}}
 {{---------}}
 {{1, 2, 3}}
 {{(1 row)}}

The goal of this Jira ticket is to change the current implementation of array_join function to support other types of arrays.



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