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## What changes were proposed in this pull request? a followup of https://github.com/apache/spark/pull/22749. When we construct the new serializer in `ExpressionEncoder.tuple`, we don't need to add `if(isnull ...)` check for each field. They are either simple expressions that can propagate null correctly(e.g. `GetStructField(GetColumnByOrdinal(0, schema), index)`), or complex expression that already have the isnull check. ## How was this patch tested? existing tests Closes #22898 from cloud-fan/minor. Authored-by: Wenchen Fan <wenchen@databricks.com> Signed-off-by: Wenchen Fan <wenchen@databricks.com> |
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