kangkaisen commented on a change in pull request #3214: Fix cast date type 
return wrong result
URL: https://github.com/apache/incubator-doris/pull/3214#discussion_r399163380
 
 

 ##########
 File path: fe/src/main/java/org/apache/doris/analysis/DateLiteral.java
 ##########
 @@ -319,7 +319,7 @@ protected void toThrift(TExprNode msg) {
 
     @Override
     protected Expr uncheckedCastTo(Type targetType) throws AnalysisException {
-        if (targetType.isDateType()) {
+        if (targetType.equals(this.type)) {
 
 Review comment:
   Are you sure only change this point is enough?
   Do we need to change this point:
   FunctionCallExpr::analyzeImpl
   ```
           Type[] args = fn.getArgs();
           if (args.length > 0) {
               // Implicitly cast all the children to match the function if 
necessary
               for (int i = 0; i < argTypes.length; ++i) {
                   // For varargs, we must compare with the last type in 
callArgs.argTypes.
                   int ix = Math.min(args.length - 1, i);
                   if (!argTypes[i].matchesType(args[ix]) && !(
                           argTypes[i].isDateType() && args[ix].isDateType())) {
                       uncheckedCastChild(args[ix], i);
                       //if (argTypes[i] != args[ix]) castChild(args[ix], i);
                   }
               }
           }
   ```

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