jonahgao commented on code in PR #13902:
URL: https://github.com/apache/datafusion/pull/13902#discussion_r1897221740


##########
datafusion/sqllogictest/bin/sqllogictests.rs:
##########
@@ -40,19 +40,25 @@ pub fn main() -> Result<()> {
         .block_on(run_tests())
 }
 
-fn value_validator(actual: &[Vec<String>], expected: &[String]) -> bool {
-    let expected = expected
-        .iter()
-        // Trailing whitespace from lines in SLT will typically be removed, 
but do not fail if it is not
-        // If particular test wants to cover trailing whitespace on a value,
-        // it should project additional non-whitespace column on the right.
-        .map(|s| s.trim_end().to_owned())
-        .collect::<Vec<_>>();
+#[allow(clippy::ptr_arg)]
+fn normalizer(s: &String) -> String {
+    // Trailing whitespace from lines in SLT will typically be removed, but do 
not fail if it is not
+    // If particular test wants to cover trailing whitespace on a value,
+    // it should project additional non-whitespace column on the right.
+    s.trim_end().to_owned()
+}
+
+fn value_validator(
+    normalizer: Normalizer,

Review Comment:
   Not related to this PR, I'm a bit confused about why sqllogictests need a 
`Normalizer`🤔 
   The value validator can already be customized, and specifically, the 
validator will call the normalizer within its proces. `Normalizer` seems like 
an unnecessary design to me.



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