morrySnow commented on code in PR #23613:
URL: https://github.com/apache/doris/pull/23613#discussion_r1309578099


##########
fe/fe-core/src/main/java/org/apache/doris/catalog/FunctionSet.java:
##########
@@ -241,6 +242,11 @@ public Function getFunction(Function desc, 
Function.CompareMode mode, boolean is
                 inferenceFunctions.add(fn);
                 continue;
             }
+            // datev1 function signature can not be normal one
+            if (fn.getFunctionName().getFunction().equalsIgnoreCase("to_date")
+                    && Config.disable_datev1 && fn.getReturnType() == 
Type.DATE) {
+                continue;

Review Comment:
   i think we should not remove this function signature. we should do cast 
datev1 to datev2 when we create table and insert data



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