dongxiaoman opened a new issue #7524:
URL: https://github.com/apache/pinot/issues/7524
Got an `java.lang.UnsupportedOperationException` error on
`ForwardIndexReader::readDictIds`, when I query distinct multi-value column
based on a filter of another distinct volume.
The query is something like below:
```
select account_key from point_transaction
where
external_id = 'some_id_xxx'
group by account_key
```
where both `account_key` and `external_id` are a multi-value column.
The exception call stack is like below:
```
ERROR [BaseCombineOperator] [pqw-3] Caught exception while executing
operator of index: 376 (query:
QueryContext{_tableName='point_transaction_OFFLINE',
_selectExpressions=[distinct(account_key)], _aliasList=[null],
_filter=((metadata_fields_values = 'ch_0Ig6M7xe9GF9c1YNN4GNQ0wo' OR external_id
= 'ch_0Ig6M7xe9GF9c1YNN4GNQ0wo') AND created_at <= '1633453199'),
_groupByExpressions=null, _havingFilter=null, _orderByExpressions=null,
_limit=200, _offset=0, _queryOptions={responseFormat=sql, groupByMode=sql,
timeoutMs=9893}, _debugOptions=null,
_brokerRequest=BrokerRequest(querySource:QuerySource(tableName:point_transaction_OFFLINE),
pinotQuery:PinotQuery(dataSource:DataSource(tableName:point_transaction_OFFLINE),
selectList:[Expression(type:FUNCTION, functionCall:Function(operator:distinct,
operands:[Expression(type:IDENTIFIER,
identifier:Identifier(name:account_key))]))],
filterExpression:Expression(type:FUNCTION, functionCall:Function(operator:AND,
operands:[Expression(type:FUNCTION
, functionCall:Function(operator:OR, operands:[Expression(type:FUNCTION,
functionCall:Function(operator:EQUALS, operands:[Expression(type:IDENTIFIER,
identifier:Identifier(name:metadata_fields_values)), Expression(type:LITERAL,
literal:<Literal stringValue:ch_0Ig6M7xe9GF9c1YNN4GNQ0wo>)])),
Expression(type:FUNCTION, functionCall:Function(operator:EQUALS,
operands:[Expression(type:IDENTIFIER, identifier:Identifier(name:external_id)),
Expression(type:LITERAL, literal:<Literal
stringValue:ch_0Ig6M7xe9GF9c1YNN4GNQ0wo>)]))])), Expression(type:FUNCTION,
functionCall:Function(operator:LESS_THAN_OR_EQUAL,
operands:[Expression(type:IDENTIFIER, identifier:Identifier(name:created_at)),
Expression(type:LITERAL, literal:<Literal stringValue:1633453199>)]))])),
orderByList:[], limit:200, queryOptions:{responseFormat=sql, groupByMode=sql,
timeoutMs=9893}))})
java.lang.UnsupportedOperationException: null
at
org.apache.pinot.segment.spi.index.reader.ForwardIndexReader.readDictIds(ForwardIndexReader.java:84)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.common.DataFetcher$ColumnValueReader.readDictIds(DataFetcher.java:278)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.common.DataFetcher.fetchDictIds(DataFetcher.java:88)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.common.DataBlockCache.getDictIdsForSVColumn(DataBlockCache.java:99)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.operator.docvalsets.ProjectionBlockValSet.getDictionaryIdsSV(ProjectionBlockValSet.java:69)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.query.distinct.dictionary.DictionaryBasedSingleColumnDistinctOnlyExecutor.process(DictionaryBasedSingleColumnDistinctOnlyExecutor.java:42)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.operator.query.DistinctOperator.getNextBlock(DistinctOperator.java:61)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.operator.query.DistinctOperator.getNextBlock(DistinctOperator.java:38)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.operator.BaseOperator.nextBlock(BaseOperator.java:49)
~[pinot-all-0.9.0-2021-09-09-b53464461-SNAPSHOT-jar-with-dependencies.jar:0.9.0-2021-09-09-b53464461-SNAPSHOT-b53464461cbdd36655ef7e9b7cf13f42975aa059]
at
org.apache.pinot.core.operator.combine.BaseCombineOperator.processSegments(BaseCombineOperator.java:150)
```
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