[GitHub] [carbondata] ajantha-bhat commented on a change in pull request #3717: [CARBONDATA-3780]Old store read compatibility issue for Index handler column

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[GitHub] [carbondata] ajantha-bhat commented on a change in pull request #3717: [CARBONDATA-3780]Old store read compatibility issue for Index handler column

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ajantha-bhat commented on a change in pull request #3717:
URL: https://github.com/apache/carbondata/pull/3717#discussion_r413520184



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File path: core/src/main/java/org/apache/carbondata/core/metadata/converter/ThriftWrapperSchemaConverterImpl.java
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@@ -605,6 +605,14 @@ public TableSchema fromExternalToWrapperTableSchema(
           .setLocalDictColumnsToWrapperSchema(listOfColumns, externalTableSchema.tableProperties,
               externalTableSchema.tableProperties
                   .get(CarbonCommonConstants.LOCAL_DICTIONARY_ENABLE));
+      String handler = externalTableSchema.tableProperties.get(CarbonCommonConstants.INDEX_HANDLER);
+      if (handler != null) {
+        for (ColumnSchema columnSchema : listOfColumns) {
+          if (handler.equalsIgnoreCase(columnSchema.getColumnName())) {

Review comment:
       I strongly agree with @jackylk, we already have many index like SI, bloom, lucene.
   This index handler and isIndex column is confusing.
   so we should have something like `spatialIndexHandler` and `isSpatialIndexColumn` as we use these interface for geo spatial / spatial only now.
   
   But renaming thrift will again create compatibility issue if somebody started geospatial already.
   
   @VenuReddy2103 : we can have that renaming change in another PR.




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