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https://issues.apache.org/jira/browse/CASSANDRA-10715?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15348209#comment-15348209
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Jeremiah Jordan commented on CASSANDRA-10715:
---------------------------------------------
[~blerer] see discussions on CASSANDRA-10786 about moving forward with v5
changes before 4.0
> Allow filtering on NULL
> -----------------------
>
> Key: CASSANDRA-10715
> URL: https://issues.apache.org/jira/browse/CASSANDRA-10715
> Project: Cassandra
> Issue Type: Improvement
> Components: CQL
> Environment: C* 3.0.0 | cqlsh | C# driver 3.0.0beta2 | Windows 2012 R2
> Reporter: Kishan Karunaratne
> Assignee: Benjamin Lerer
> Priority: Minor
> Labels: protocolv5
> Fix For: 4.0
>
> Attachments:
> 0001-Allow-null-values-in-filtered-searches-reuse-Operato.patch
>
>
> This is an issue I first noticed through the C# driver, but I was able to
> repro on cqlsh, leading me to believe this is a Cassandra bug.
> Given the following schema:
> {noformat}
> CREATE TABLE "TestKeySpace_4928dc892922"."coolMovies" (
> unique_movie_title text,
> movie_maker text,
> director text,
> list list<text>,
> "mainGuy" text,
> "yearMade" int,
> PRIMARY KEY ((unique_movie_title, movie_maker), director)
> ) WITH CLUSTERING ORDER BY (director ASC)
> {noformat}
> Executing a SELECT with FILTERING on a non-PK column, using a NULL as the
> argument:
> {noformat}
> SELECT "mainGuy", "movie_maker", "unique_movie_title", "list", "director",
> "yearMade" FROM "coolMovies" WHERE "mainGuy" = null ALLOW FILTERING
> {noformat}
> returns a ReadFailure exception:
> {noformat}
> cqlsh:TestKeySpace_4c8f2cf8d5cc> SELECT "mainGuy", "movie_maker",
> "unique_movie_title", "list", "director", "yearMade" FROM "coolMovies" WHERE
> "mainGuy" = null ALLOW FILTERING;
> ←[0;1;31mTraceback (most recent call last):
> File "C:\Users\Kishan\.ccm\repository\3.0.0\bin\\cqlsh.py", line 1216, in
> perform_simple_statement
> result = future.result()
> File
> "C:\Users\Kishan\.ccm\repository\3.0.0\bin\..\lib\cassandra-driver-internal-only-3.0.0a3.post0-3f15725.zip\cassandra-driver-3.0.0a3.post0-3f15725\cassandra\cluster.py",
> line 3118, in result
> raise self._final_exception
> ReadFailure: code=1300 [Replica(s) failed to execute read] message="Operation
> failed - received 0 responses and 1 failures" info={'failures': 1,
> 'received_responses': 0, 'required_responses': 1, 'cons
> istency': 'ONE'}
> ←[0m
> {noformat}
> Cassandra log shows:
> {noformat}
> WARN [SharedPool-Worker-2] 2015-11-16 13:51:00,259
> AbstractTracingAwareExecutorService.java:169 - Uncaught exception on thread
> Thread[SharedPool-Worker-2,10,main]: {}
> java.lang.AssertionError: null
> at
> org.apache.cassandra.db.filter.RowFilter$SimpleExpression.isSatisfiedBy(RowFilter.java:581)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.filter.RowFilter$CQLFilter$1IsSatisfiedFilter.applyToRow(RowFilter.java:243)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.transform.BaseRows.applyOne(BaseRows.java:95)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at org.apache.cassandra.db.transform.BaseRows.add(BaseRows.java:86)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.transform.UnfilteredRows.add(UnfilteredRows.java:21)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.transform.Transformation.add(Transformation.java:136)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.transform.Transformation.apply(Transformation.java:102)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.filter.RowFilter$CQLFilter$1IsSatisfiedFilter.applyToPartition(RowFilter.java:233)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.filter.RowFilter$CQLFilter$1IsSatisfiedFilter.applyToPartition(RowFilter.java:227)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.transform.BasePartitions.hasNext(BasePartitions.java:76)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.partitions.UnfilteredPartitionIterators$Serializer.serialize(UnfilteredPartitionIterators.java:293)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.ReadResponse$LocalDataResponse.build(ReadResponse.java:136)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.ReadResponse$LocalDataResponse.<init>(ReadResponse.java:128)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.ReadResponse$LocalDataResponse.<init>(ReadResponse.java:123)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.ReadResponse.createDataResponse(ReadResponse.java:65)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.db.ReadCommand.createResponse(ReadCommand.java:288)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.service.StorageProxy$LocalReadRunnable.runMayThrow(StorageProxy.java:1692)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> org.apache.cassandra.service.StorageProxy$DroppableRunnable.run(StorageProxy.java:2346)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at
> java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:511)
> ~[na:1.8.0_60]
> at
> org.apache.cassandra.concurrent.AbstractTracingAwareExecutorService$FutureTask.run(AbstractTracingAwareExecutorService.java:164)
> ~[apache-cassandra-3.0.0.jar:3.0.0]
> at org.apache.cassandra.concurrent.SEPWorker.run(SEPWorker.java:105)
> [apache-cassandra-3.0.0.jar:3.0.0]
> at java.lang.Thread.run(Thread.java:745) [na:1.8.0_60]
> {noformat}
> In C* < 3.0.0 (such as 2.2.3), this same query correctly returns:
> {noformat}
> cqlsh:TestKeySpace_3231cd551e49> SELECT "mainGuy", "movie_maker",
> "unique_movie_title", "list", "director", "yearMade" FROM "coolMovies" WHERE
> "mainGuy" = null ALLOW FILTERING;
> ←[0;1;31mInvalidRequest: code=2200 [Invalid query] message="Unsupported null
> value for indexed column mainGuy"←[0m
> {noformat}
> Not sure if related, but using a value for the argument instead of null
> returns 0 rows in 3.0.0, but correctly returns an InvalidRequest exception in
> C* 2.2.3:
> {noformat}
> SELECT "mainGuy", "movie_maker", "unique_movie_title", "list", "director",
> "yearMade" FROM "coolMovies" WHERE "yearMade" = 100 ALLOW FILTERING
> {noformat}
> In C* 2.2.3:
> {noformat}
> cqlsh:TestKeySpace_4928dc892922> SELECT "mainGuy", "movie_maker",
> "unique_movie_title", "list", "director", "yearMade" FROM "coolMovies" WHERE
> "yearMade" = 100 ALLOW FILTERING;
> ←[0;1;31mInvalidRequest: code=2200 [Invalid query] message="No secondary
> indexes on the restricted columns support the provided operators: "←[0m
> {noformat}
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