walterddr commented on a change in pull request #7648:
URL: https://github.com/apache/pinot/pull/7648#discussion_r738873878



##########
File path: 
pinot-segment-local/src/main/java/org/apache/pinot/segment/local/utils/TableConfigUtils.java
##########
@@ -655,35 +655,39 @@ private static void validateFieldConfigList(@Nullable 
List<FieldConfig> fieldCon
       Preconditions.checkState(fieldConfigColSpec != null,
           "Column Name " + columnName + " defined in field config list must be 
a valid column defined in the schema");
 
-      List<String> noDictionaryColumns = 
indexingConfigs.getNoDictionaryColumns();
-      switch (fieldConfig.getEncodingType()) {
-        case DICTIONARY:
-          if (noDictionaryColumns != null) {
-            
Preconditions.checkArgument(!noDictionaryColumns.contains(columnName),
-                "FieldConfig encoding type is different from indexingConfig 
for column: " + columnName);
-          }
-          Preconditions.checkArgument(fieldConfig.getCompressionCodec() == 
null,
-              "Set compression codec to null for dictionary encoding type");
-          break;
-        default:
-          break;
+      if (fieldConfig.getEncodingType() != null && indexingConfigs != null) {

Review comment:
       it felt like to me we should make a default encodingType = DICTIONARY if 
it is null. for backward compatible consideration since some JSON might've 
encodingType as null but indexing type as INVERTED?




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