[CALCITE-614] IN clause in CASE in GROUP BY gives AssertionError

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.1.0-incubating, 0.9.1-incubating
• Fix Version/s: 1.2.0-incubating
• Assignee: Julian Hyde
• Reporter: Hongbin Ma
• Created: 11/Mar/15 17:41
• Updated: 16/Apr/15 08:35
• Resolved: 23/Mar/15 22:42

Description

hi, i'm using the latest optiq-csv(which depends on calcite 0.9.1).
I even tried changing 0.9.1 to 0.9.2 in optiq-csv's pom, but it will fail "mvn clean install"

here's my problem:

==============================================
select (CASE WHEN (GENDER = 'F') THEN 'woman' ELSE GENDER END), min(EMPID) from EMPS group by (CASE WHEN (GENDER = 'F') THEN 'woman' ELSE GENDER END)

>>> this works

select (CASE WHEN (GENDER IN ('M','F')) THEN 'known' ELSE GENDER END), min(EMPID) from EMPS group by (CASE WHEN (GENDER IN ('M','F')) THEN 'known' ELSE GENDER END)

>>> this will not work with exception:
java.lang.AssertionError: Internal error: while converting CASE WHEN `EMPS`.`GENDER` IN ('M', 'F') THEN 'known' ELSE `EMPS`.`GENDER` END
at org.eigenbase.util.Util.newInternal(Util.java:753)
at org.eigenbase.sql2rel.ReflectiveConvertletTable$1.convertCall(ReflectiveConvertletTable.java:92)
at org.eigenbase.sql2rel.SqlNodeToRexConverterImpl.convertCall(SqlNodeToRexConverterImpl.java:51)
at org.eigenbase.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:4162)
at org.eigenbase.sql2rel.SqlToRelConverter$Blackboard.visit(SqlToRelConverter.java:3610)
at org.eigenbase.sql.SqlCall.accept(SqlCall.java:124)
at org.eigenbase.sql2rel.SqlToRelConverter$Blackboard.convertExpression(SqlToRelConverter.java:4055)
at org.eigenbase.sql2rel.SqlToRelConverter$AggConverter.addGroupExpr(SqlToRelConverter.java:4343)
at org.eigenbase.sql2rel.SqlToRelConverter.createAggImpl(SqlToRelConverter.java:2433)
at org.eigenbase.sql2rel.SqlToRelConverter.convertAgg(SqlToRelConverter.java:2384)
at org.eigenbase.sql2rel.SqlToRelConverter.convertSelectImpl(SqlToRelConverter.java:491)
at org.eigenbase.sql2rel.SqlToRelConverter.convertSelect(SqlToRelConverter.java:451)
at org.eigenbase.sql2rel.SqlToRelConverter.convertQueryRecursive(SqlToRelConverter.java:2803)
at org.eigenbase.sql2rel.SqlToRelConverter.convertQuery(SqlToRelConverter.java:409)
at net.hydromatic.optiq.prepare.Prepare.prepareSql(Prepare.java:211)
at net.hydromatic.optiq.prepare.Prepare.prepareSql(Prepare.java:178)
at net.hydromatic.optiq.prepare.OptiqPrepareImpl.prepare2_(OptiqPrepareImpl.java:412)
at net.hydromatic.optiq.prepare.OptiqPrepareImpl.prepare_(OptiqPrepareImpl.java:318)
at net.hydromatic.optiq.prepare.OptiqPrepareImpl.prepareSql(OptiqPrepareImpl.java:287)
at net.hydromatic.optiq.jdbc.OptiqConnectionImpl.parseQuery(OptiqConnectionImpl.java:170)
at net.hydromatic.optiq.jdbc.MetaImpl.prepare(MetaImpl.java:617)
at net.hydromatic.avatica.AvaticaStatement.execute(AvaticaStatement.java:67)
at sqlline.Commands.execute(Commands.java:822)
at sqlline.Commands.sql(Commands.java:732)
at sqlline.SqlLine.dispatch(SqlLine.java:808)
at sqlline.SqlLine.begin(SqlLine.java:681)
at sqlline.SqlLine.start(SqlLine.java:398)
at sqlline.SqlLine.main(SqlLine.java:292)
Caused by: java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.eigenbase.sql2rel.ReflectiveConvertletTable$1.convertCall(ReflectiveConvertletTable.java:83)
... 26 more
Caused by: java.lang.NullPointerException
at org.eigenbase.sql2rel.SqlToRelConverter$Blackboard.convertExpression(SqlToRelConverter.java:4045)
at org.eigenbase.sql2rel.StandardConvertletTable.convertCase(StandardConvertletTable.java:254)
... 31 more

Issue Links

• duplicates: CALCITE-516 GROUP BY on a CASE expression containing IN predicate fails
• is depended upon by: KYLIN-635 IN clause within CASE when is not working