jayzhan211 commented on code in PR #14440:
URL: https://github.com/apache/datafusion/pull/14440#discussion_r1953648058


##########
datafusion/expr-common/src/signature.rs:
##########
@@ -365,7 +365,12 @@ impl TypeSignature {
         }
     }
 
-    /// get all possible types for the given `TypeSignature`
+    /// This function is used specifically internally for `information_schema`
+    /// We suggest not to rely on this function
+    ///
+    /// Get all possible types for `information_schema` from the given 
`TypeSignature`
+    //
+    // TODO: Make this function private
     pub fn get_possible_types(&self) -> Vec<Vec<DataType>> {

Review Comment:
   This is public function 😮 



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