Robin Qiu created BEAM-10847:
--------------------------------
Summary: NPE in BeamUnnestRel
Key: BEAM-10847
URL: https://issues.apache.org/jira/browse/BEAM-10847
Project: Beam
Issue Type: Bug
Components: dsl-sql-zetasql
Reporter: Robin Qiu
Assignee: Robin Qiu
I run `SELECT id, n FROM my_dataset.my_table, UNNEST(arr) AS n` on DataflowSQL
where my_table has an INT64 field id and ARRAY<INT64> field arr. I encountered
an NullPointerException:
java.lang.NullPointerException
at
org.apache.beam.sdk.extensions.sql.impl.utils.CalciteUtils.toSchema
(CalciteUtils.java:186)
at
org.apache.beam.sdk.extensions.sql.impl.rel.BeamUnnestRel$Transform.expand
(BeamUnnestRel.java:111)
at
org.apache.beam.sdk.extensions.sql.impl.rel.BeamUnnestRel$Transform.expand
(BeamUnnestRel.java:105)
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.lambda$buildPCollectionList$0
(BeamSqlRelUtils.java:50)
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.impl.rel.BeamSqlRelUtils.buildPCollectionList
(BeamSqlRelUtils.java:51)
at
org.apache.beam.sdk.extensions.sql.impl.rel.BeamSqlRelUtils.toPCollection
(BeamSqlRelUtils.java:67)
at
org.apache.beam.sdk.extensions.sql.impl.rel.BeamSqlRelUtils.toPCollection
(BeamSqlRelUtils.java:39)
at
org.apache.beam.sdk.extensions.sql.SqlTransform.expand (SqlTransform.java:134)
at
org.apache.beam.sdk.extensions.sql.SqlTransform.expand (SqlTransform.java:86)
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.values.PBegin.apply (PBegin.java:56)
at
org.apache.beam.sdk.Pipeline.apply (Pipeline.java:186)
at
com.google.cloud.dataflow.sqllauncher.DataflowSqlLauncher.buildPipelineOrThrow
(DataflowSqlLauncher.java:178)
at
com.google.cloud.dataflow.sqllauncher.DataflowSqlLauncher.buildPipeline
(DataflowSqlLauncher.java:114)
at
com.google.cloud.dataflow.sqllauncher.DataflowSqlLauncher.buildAndRunPipeline
(DataflowSqlLauncher.java:105)
at
com.google.cloud.dataflow.sqllauncher.DataflowSqlLauncher.main
(DataflowSqlLauncher.java:73)
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