NPE on malformed CQL
--------------------
Key: CASSANDRA-3349
URL: https://issues.apache.org/jira/browse/CASSANDRA-3349
Project: Cassandra
Issue Type: Bug
Components: Core
Affects Versions: 0.8.0 beta 2
Reporter: paul cannon
It's not clear why, but the CQL grammar specification in Cql.g allows for an
empty WHERE clause on DELETE, i.e.:
{noformat}
DELETE FROM someCF WHERE;
{noformat}
When this is used, with or without a column list, it causes an NPE on the node
processing the CQL. Traceback on a recent 1.0.0 build:
{noformat}
ERROR [pool-2-thread-1] 2011-10-11 15:45:25,655 Cassandra.java (line 4082)
Internal error processing execute_cql_query
java.lang.NullPointerException
at
org.apache.cassandra.cql.CqlParser.deleteStatement(CqlParser.java:1994)
at org.apache.cassandra.cql.CqlParser.query(CqlParser.java:292)
at
org.apache.cassandra.cql.QueryProcessor.getStatement(QueryProcessor.java:984)
at
org.apache.cassandra.cql.QueryProcessor.process(QueryProcessor.java:500)
at
org.apache.cassandra.thrift.CassandraServer.execute_cql_query(CassandraServer.java:1268)
at
org.apache.cassandra.thrift.Cassandra$Processor$execute_cql_query.process(Cassandra.java:4072)
at
org.apache.cassandra.thrift.Cassandra$Processor.process(Cassandra.java:2889)
at
org.apache.cassandra.thrift.CustomTThreadPoolServer$WorkerProcess.run(CustomTThreadPoolServer.java:187)
at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
at java.lang.Thread.run(Thread.java:680)
{noformat}
The CQL client gets an error with the message, "Internal application error".
It might be better to allow leaving off the "WHERE" as well as the condition,
to match SQL semantics, although fixing that probably won't solve this problem.
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