zhuliquan commented on code in PR #13531:
URL: https://github.com/apache/datafusion/pull/13531#discussion_r1856580633


##########
datafusion/core/tests/parquet/external_access_plan.rs:
##########
@@ -369,45 +379,43 @@ struct TestData {
     file_size: u64,
 }
 
-static TEST_DATA: OnceLock<TestData> = OnceLock::new();
+static _TEST_DATA: OnceLock<TestData> = OnceLock::new();
 
 /// Return a parquet file with 2 row groups each with 5 rows
-fn get_test_data() -> &'static TestData {
-    TEST_DATA.get_or_init(|| {

Review Comment:
   > The reason to use the `TEST_DATA` thing was to avoid creating the same 
file over and over again.
   > 
   > Do we need to remove `TEST_DATA`?
   > 
   > It seems like the core difference is the use of `tempfile_in` rather than 
the change from static
   
   There is no chance for delete TEST_DATA. Because there is no main test 
function to lead minor test cases.



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