Github user kevinjmh commented on the issue:
https://github.com/apache/carbondata/pull/2886
The InvertedIndex/NoInvertedIndex setting is confusing.
1. the value `isInvertedIndex` assigned to different IndexCodec in
`createEncoderForDimensionLegacy` requires us to set the column both
SortColumns and use InvertedIndex. What if I set it in INVERTED_INDEX but not
in SORT_COLUMNSï¼
2. what the boolean value `isInvertedIndex` in IndexCodec do is to control
whether to do RLE on datapage?
These make the setting not a direct switch to control how the data proceed
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