jiashenC commented on code in PR #13420:
URL: https://github.com/apache/datafusion/pull/13420#discussion_r1844388835


##########
datafusion/sqllogictest/test_files/scalar.slt:
##########
@@ -1864,10 +1864,10 @@ query TT
 EXPLAIN SELECT letter, letter = LEFT(letter2, 1) FROM simple_string;
 ----
 logical_plan
-01)Projection: simple_string.letter, simple_string.letter = 
left(simple_string.letter2, Int64(1))
+01)Projection: simple_string.letter, simple_string.letter = 
left(CAST(simple_string.letter2 AS Utf8View), Int64(1))

Review Comment:
   Thanks for the suggestion. I implement not to cast if their logical types 
are the same. However, it is failing in some cases where `Dictionary` is in the 
signature. In those cases, the logical type is the same, but the native type is 
`Dictionary` causing type mismatch. The test can be reproduced 
   ```
   cargo test --test sqllogictests -- jctest
   ```
   Any suggestions?



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