Weijun-H commented on code in PR #9023:
URL: https://github.com/apache/arrow-datafusion/pull/9023#discussion_r1468719876
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datafusion/physical-expr/src/array_expressions.rs:
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@@ -2766,6 +2766,72 @@ where
)?))
}
+/// array_reverse SQL function
+pub fn array_reverse(arg: &[ArrayRef]) -> Result<ArrayRef> {
+ if arg.len() != 1 {
+ return exec_err!("array_reverse needs one argument");
+ }
+
+ match &arg[0].data_type() {
+ DataType::List(field) => {
+ let array = as_list_array(&arg[0])?;
+ general_array_reverse::<i32>(array, &field)
+ }
+ DataType::LargeList(field) => {
+ let array = as_large_list_array(&arg[0])?;
+ general_array_reverse::<i64>(array, &field)
+ }
+ DataType::Null => Ok(arg[0].clone()),
Review Comment:
We do not handle `FixedSizeList` here, which will be solved by type coercion.
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