Quick question: does pinot 0.8 support group by MV functionality? Here is sample query

SELECT mv_column
FROM enriched_customer_orders_v1_17_1 
GROUP BY mv_column
LIMIT 10

Here is the exception:

"message": "QueryExecutionError:\njava.lang.UnsupportedOperationException\n\tat org.apache.pinot.segment.spi.index.reader.MutableForwardIndex.readDictIds(MutableForwardIndex.java:71)\n\tat org.apache.pinot.segment.spi.index.reader.MutableForwardIndex.readDictIds(MutableForwardIndex.java:76)\n\tat org.apache.pinot.core.common.DataFetcher$ColumnValueReader.readDictIds(DataFetcher.java:278)\n\tat org.apache.pinot.core.common.DataFetcher.fetchDictIds(DataFetcher.java:88)\n\tat org.apache.pinot.core.common.DataBlockCache.getDictIdsForSVColumn(DataBlockCache.java:99)\n\tat org.apache.pinot.core.operator.docvalsets.ProjectionBlockValSet.getDictionaryIdsSV(ProjectionBlockValSet.java:69)\n\tat org.apache.pinot.core.query.distinct.dictionary.DictionaryBasedSingleColumnDistinctOnlyExecutor.process(DictionaryBasedSingleColumnDistinctOnlyExecutor.java:42)\n\tat org.apache.pinot.core.operator.query.DistinctOperator.getNextBlock(DistinctOperator.java:61)\n\tat org.apache.pinot.core.operator.query.DistinctOperator.getNextBlock(DistinctOperator.java:38)\n\tat org.apache.pinot.core.operator.BaseOperator.nextBlock(BaseOperator.java:49)\n\tat org.apache.pinot.core.operator.combine.BaseCombineOperator.processSegments(BaseCombineOperator.java:150)\n\tat org.apache.pinot.core.operator.combine.BaseCombineOperator$1.runJob(BaseCombineOperator.java:105)\n\tat org.apache.pinot.core.util.trace.TraceRunnable.run(TraceRunnable.java:40)\n\tat java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)",
    "errorCode": 200