[ASTERIXDB-2550] ClassCastException at compile time

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Affects Version/s: 0.9.4
• Fix Version/s: 0.9.4.2
• Component/s: COMP - Compiler
• Assignee: Dmitry Lychagin
• Reporter: Dmitry Lychagin
• Created: 17/Apr/19 22:12
• Updated: 18/Apr/19 17:04
• Resolved: 18/Apr/19 17:04

Description

DDL: 

create type test.TestType as { id : integer };
create dataset t1(TestType) primary key id;

Query:

SELECT * FROM (
  SELECT a FROM t1
)[0] i

Exception:

java.lang.ClassCastException: org.apache.asterix.om.types.ARecordType cannot be cast to org.apache.asterix.om.types.AbstractCollectionType
        at org.apache.asterix.om.typecomputer.impl.CollectionMemberResultType.getResultType(CollectionMemberResultType.java:69) ~[classes/:?]
        at org.apache.asterix.om.typecomputer.impl.TypeComputeUtils.resolveResultType(TypeComputeUtils.java:124) ~[classes/:?]
        at org.apache.asterix.om.typecomputer.base.AbstractResultTypeComputer.computeType(AbstractResultTypeComputer.java:44) ~[classes/:?]
        at org.apache.asterix.dataflow.data.common.ExpressionTypeComputer.getTypeForFunction(ExpressionTypeComputer.java:84) ~[classes/:?]
        at org.apache.asterix.dataflow.data.common.ExpressionTypeComputer.getType(ExpressionTypeComputer.java:55) ~[classes/:?]
        at org.apache.hyracks.algebricks.core.algebra.typing.AbstractTypeEnvironment.getType(AbstractTypeEnvironment.java:45) ~[classes/:?]
        at org.apache.hyracks.algebricks.core.algebra.operators.logical.UnnestOperator.computeOutputTypeEnvironment(UnnestOperator.java:51) ~[classes/:?]