JNSimba commented on code in PR #427:
URL: 
https://github.com/apache/doris-flink-connector/pull/427#discussion_r1677570847


##########
flink-doris-connector/src/main/java/org/apache/doris/flink/serialization/RowBatch.java:
##########
@@ -507,14 +570,30 @@ public static String completeMilliseconds(String 
stringValue) {
             return stringValue;
         }
 
-        StringBuilder sb = new StringBuilder(stringValue);
         if (stringValue.length() == DATETIME_PATTERN.length()) {
-            sb.append(".");
+            stringValue += ".";
         }
-        while (sb.toString().length() < DATETIMEV2_PATTERN.length()) {
-            sb.append(0);
+        int s = DATETIMEV2_PATTERN.length() - stringValue.length();
+        switch (s) {
+            case 1:
+                return stringValue + "0";
+            case 2:
+                return stringValue + "00";
+            case 3:
+                return stringValue + "000";
+            case 4:
+                return stringValue + "0000";
+            case 5:
+                return stringValue + "00000";
+            case 6:
+                return stringValue + "000000";
+            default:
+                return stringValue;
         }
-        return sb.toString();
+        //        while (sb.toString().length() < DATETIMEV2_PATTERN.length()) 
{
+        //            sb.add("0");
+        //        }
+        //        return sb.toString();

Review Comment:
   Add a comment explaining the reason for the change



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