eaugene opened a new issue, #11292:
URL: https://github.com/apache/pinot/issues/11292
Schema of MV field :
`{
"name": "gradesfinal",
"dataType": "STRING",
"singleValueField": false
}`
`gradesfinal` is made as noDictColumn , to save the size
In this case when `select DISTINCTCOUNT(gradesfinal) from table limit 100`
is executed getting error
```
[
{
"message":
"QueryExecutionError:\njava.lang.UnsupportedOperationException\n\tat
org.apache.pinot.segment.spi.index.reader.ForwardIndexReader.getString(ForwardIndexReader.java:427)\n\tat
org.apache.pinot.core.common.DataFetcher$ColumnValueReader.readStringValues(DataFetcher.java:601)\n\tat
org.apache.pinot.core.common.DataFetcher.fetchStringValues(DataFetcher.java:239)\n\tat
org.apache.pinot.core.common.DataBlockCache.getStringValuesForSVColumn(DataBlockCache.java:277)",
"errorCode": 200
}
]
```
However when the multi-valued field is removed from noDictColumns , the
query works
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