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https://issues.apache.org/jira/browse/BEAM-9992?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17160582#comment-17160582
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Rui Wang commented on BEAM-9992:
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That's a great find! I did a search in SQL module and there is not
`NullableCoder` usage. I bet it is the cause when handling bytes in SQL.
Interesting though that seems other types do not have such problem (at least I
haven't see it).
I am thinking if in your Sets implementation, before go to GBK or CoGBK, reset
coder to nullable coder will help?
> Migrate BeamSQL's SET operators to Sets transforms
> --------------------------------------------------
>
> Key: BEAM-9992
> URL: https://issues.apache.org/jira/browse/BEAM-9992
> Project: Beam
> Issue Type: New Feature
> Components: dsl-sql, dsl-sql-zetasql
> Reporter: Darshan Jani
> Assignee: Darshan Jani
> Priority: P2
> Time Spent: 3h 20m
> Remaining Estimate: 0h
>
> As par of [BEAM-9946|https://issues.apache.org/jira/browse/BEAM-9946] we have
> new Sets transforms for intersect,union and except.
> This jira is to use them to remove existing Set operators in BeamSQL code.
> Tasks:
> # Remove:
> [BeamSetOperatorRelBase.java|https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamSetOperatorRelBase.java]
> # use SetFns transforms from
> ##
> [BeamIntersectRel.java|https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamIntersectRel.java]
> ##
> [BeamMinusRel.java|https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamMinusRel.java]
> ##
> [BeamMinusRel.java|https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamMinusRel.java]
> ##
> [BeamUnionRel.java|https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/rel/BeamUnionRel.java]
> #
> Remove:[BeamSetOperatorsTransforms.java|https://github.com/apache/beam/blob/master/sdks/java/extensions/sql/src/main/java/org/apache/beam/sdk/extensions/sql/impl/transform/BeamSetOperatorsTransforms.java]
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