jayzhan211 commented on code in PR #9108:
URL: https://github.com/apache/arrow-datafusion/pull/9108#discussion_r1499263824
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datafusion/physical-expr/src/array_expressions.rs:
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@@ -433,6 +435,7 @@ pub fn array_element(args: &[ArrayRef]) -> Result<ArrayRef>
{
let indexes = as_int64_array(&args[1])?;
general_array_element::<i64>(array, indexes)
}
+ DataType::Null => Ok(args[0].clone()),
Review Comment:
We may need functions like `pre-checking`, or `validation` for checking the
input of the Array function when we move to UDF-based implementation 🤔 .
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