[GitHub] spark issue #19977: [SPARK-22771][SQL] Concatenate binary inputs into a bina...

[gatorsmile]

Github user gatorsmile commented on the issue:

    https://github.com/apache/spark/pull/19977
  
    Try
    ```
    SELECT (col1 || (col3 || col4)) col
    FROM (
      SELECT
        string(id) col1,
        encode(string(id + 2), 'utf-8') col3,
        encode(string(id + 3), 'utf-8') col4
      FROM range(10)
    )
    ```


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