[GitHub] spark issue #21045: [WIP][SPARK-23931][SQL] Adds zip function to sparksql

[mn-mikke <gi...@git.apache.org>]

Github user mn-mikke commented on the issue:

    https://github.com/apache/spark/pull/21045
  
    @DylanGuedes What about `eval.value`?
    
    Example:
    ```
    val evals = children.map(_.genCode(ctx))
    val args = ctx.freshName("args")
    
    val inputs = evals.zipWithIndex.map { case (eval, index) =>
      s"""
        ${eval.code}
        if (!${eval.isNull}) {
          $args[$index] = ${eval.value};
        }
      """
    }.mkString("\n")
        
    val result =
      s"""
         ArrayData[] $args = new ArrayData[${evals.length}];
         $inputs
         ...your transformation logic
       """
    ```


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