jorgecarleitao commented on a change in pull request #8102:
URL: https://github.com/apache/arrow/pull/8102#discussion_r490299782



##########
File path: rust/datafusion/tests/sql.rs
##########
@@ -609,6 +609,74 @@ fn execute(ctx: &mut ExecutionContext, sql: &str) -> 
Vec<String> {
     result_str(&results)
 }
 
+fn array_str(array: &Arc<dyn Array>, row_index: usize) -> String {
+    if array.is_null(row_index) {
+        return "NULL".to_string();
+    }

Review comment:
       @andygrove , isn't this the check that you refer to? I moved it to the 
beggining of the function so that it applies to all types (array or not).




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