jayzhan211 commented on code in PR #13404:
URL: https://github.com/apache/datafusion/pull/13404#discussion_r1843017667
##########
datafusion/sqllogictest/test_files/expr.slt:
##########
@@ -510,6 +510,42 @@ SELECT ltrim(NULL, 'xyz')
----
NULL
+# implicit casting with TypeSignature test
+query T
+SELECT ltrim(NULL, NULL)
+----
+NULL
+
+query T
+SELECT ltrim(12345, '1')
Review Comment:
DuckDB doesn't allow this query 🤔
Numeric string casting is quite confusing to me
```
D SELECT ltrim(12345, '1');
Binder Error: No function matches the given name and argument types
'ltrim(INTEGER_LITERAL, STRING_LITERAL)'. You might need to add explicit type
casts.
Candidate functions:
ltrim(VARCHAR) -> VARCHAR
ltrim(VARCHAR, VARCHAR) -> VARCHAR
LINE 1: SELECT ltrim(12345, '1');
```
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