chenboat commented on code in PR #11604:
URL: https://github.com/apache/pinot/pull/11604#discussion_r1336534679


##########
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/realtime/impl/json/MutableJsonIndexImpl.java:
##########
@@ -106,8 +106,11 @@ private void addFlattenedRecords(List<Map<String, String>> 
records) {
         // Put both key and key-value into the posting list. Key is useful for 
checking if a key exists in the json.
         String key = entry.getKey();
         _postingListMap.computeIfAbsent(key, k -> new 
RoaringBitmap()).add(_nextFlattenedDocId);
-        String keyValue = key + JsonIndexCreator.KEY_VALUE_SEPARATOR + 
entry.getValue();
-        _postingListMap.computeIfAbsent(keyValue, k -> new 
RoaringBitmap()).add(_nextFlattenedDocId);
+        int length = _jsonIndexConfig.getMaxValueLength();

Review Comment:
   To confirm, we are proposing to truncate to a configurable max length of 
value like "very loooooooooooooooog value" in the json example below. It is not 
queryable because json index only supports exact match today? @Jackie-Jiang 
   ```
   {
     ....
     "a": "very loooooooooooooooog value"
      ....
   }
   ```



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