BeamSqlUnparseContext SqlBasicCall cast to SqlIdentifier

[damccorm]

one failure in shard 9

java.lang.ClassCastException: org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.sql.SqlBasicCall
cannot be cast to org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.sql.SqlIdentifier
	at org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.rel2sql.SqlImplementor$Context.toSql(SqlImplementor.java:474)
	at
org.apache.beam.sdk.extensions.sql.meta.provider.bigquery.BeamSqlUnparseContext.toSql(BeamSqlUnparseContext.java:91)
	at
org.apache.beam.vendor.calcite.v1_20_0.org.apache.calcite.rel.rel2sql.SqlImplementor$Context.toSql(SqlImplementor.java:451)
	at
org.apache.beam.sdk.extensions.sql.meta.provider.bigquery.BeamSqlUnparseContext.toSql(BeamSqlUnparseContext.java:91)
	at
org.apache.beam.sdk.extensions.sql.zetasql.BeamZetaSqlCalcRel.unparseRexNode(BeamZetaSqlCalcRel.java:120)
	at
org.apache.beam.sdk.extensions.sql.zetasql.BeamZetaSqlCalcRel.access$100(BeamZetaSqlCalcRel.java:62)
	at
org.apache.beam.sdk.extensions.sql.zetasql.BeamZetaSqlCalcRel$Transform.lambda$expand$0(BeamZetaSqlCalcRel.java:100)
	at
java.util.stream.ReferencePipeline$3$1.accept(ReferencePipeline.java:193)
	at java.util.Iterator.forEachRemaining(Iterator.java:116)
	at
java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)
	at java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:481)
	at
java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:471)
	at java.util.stream.ReduceOps$ReduceOp.evaluateSequential(ReduceOps.java:708)
	at
java.util.stream.AbstractPipeline.evaluate(AbstractPipeline.java:234)
	at java.util.stream.ReferencePipeline.collect(ReferencePipeline.java:499)
	at
org.apache.beam.sdk.extensions.sql.zetasql.BeamZetaSqlCalcRel$Transform.expand(BeamZetaSqlCalcRel.java:101)
	at
org.apache.beam.sdk.extensions.sql.zetasql.BeamZetaSqlCalcRel$Transform.expand(BeamZetaSqlCalcRel.java:88)
	at
org.apache.beam.sdk.Pipeline.applyInternal(Pipeline.java:542)
	at org.apache.beam.sdk.Pipeline.applyTransform(Pipeline.java:493)
	at
org.apache.beam.sdk.extensions.sql.impl.rel.BeamSqlRelUtils.toPCollection(BeamSqlRelUtils.java:69)
	at
org.apache.beam.sdk.extensions.sql.impl.rel.BeamSqlRelUtils.toPCollection(BeamSqlRelUtils.java:39)
	at
cloud.dataflow.sql.ExecuteQueryServiceServer$SqlComplianceServiceImpl.executeQuery(ExecuteQueryServiceServer.java:288)
	at
com.google.zetasql.testing.SqlComplianceServiceGrpc$MethodHandlers.invoke(SqlComplianceServiceGrpc.java:423)
	at
com.google.zetasql.io.grpc.stub.ServerCalls$UnaryServerCallHandler$UnaryServerCallListener.onHalfClose(ServerCalls.java:171)
	at
com.google.zetasql.io.grpc.internal.ServerCallImpl$ServerStreamListenerImpl.halfClosed(ServerCallImpl.java:283)
	at
com.google.zetasql.io.grpc.internal.ServerImpl$JumpToApplicationThreadServerStreamListener$1HalfClosed.runInContext(ServerImpl.java:711)
	at
com.google.zetasql.io.grpc.internal.ContextRunnable.run(ContextRunnable.java:37)
	at com.google.zetasql.io.grpc.internal.SerializingExecutor.run(SerializingExecutor.java:123)
	at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at
java.lang.Thread.run(Thread.java:748)

Apr 01, 2020 3:56:08 PM cloud.dataflow.sql.ExecuteQueryServiceServer$SqlComplianceServiceImpl executeQuery
INFO:
Processing Sql statement: SELECT s.a FROM (SELECT STRUCT("abc" AS a, 3 AS b) s) t

Imported from Jira BEAM-9665. Original Jira may contain additional context.
Reported by: apilloud.