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https://issues.apache.org/jira/browse/FLINK-19659?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17322936#comment-17322936
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Flink Jira Bot commented on FLINK-19659:
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This issue is assigned but has not received an update in 7 days so it has been
labeled "stale-assigned". If you are still working on the issue, please give an
update and remove the label. If you are no longer working on the issue, please
unassign so someone else may work on it. In 7 days the issue will be
automatically unassigned.
> Array type supports equals and not_equals operator when element types are
> different but castable
> ------------------------------------------------------------------------------------------------
>
> Key: FLINK-19659
> URL: https://issues.apache.org/jira/browse/FLINK-19659
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / Planner
> Affects Versions: 1.11.0
> Reporter: hailong wang
> Assignee: hailong wang
> Priority: Major
> Labels: pull-request-available, stale-assigned
> Fix For: 1.14.0
>
>
> Currently, Array type supports `equals` and `not_equals` when element types
> are the same or can not be cased. For example,
> {code:java}
> Array[1] <> Array[1] -> false{code}
> {code:java}
> Array[1] <> Array[cast(1 as bigint)] -> false
> {code}
> But for the element types which are castable, it will throw error,
> {code:java}
> org.apache.flink.table.planner.codegen.CodeGenException: Unsupported cast
> from 'ARRAY<INT NOT NULL> NOT NULL' to 'ARRAY<BIGINT NOT NULL> NOT
> NULL'.org.apache.flink.table.planner.codegen.CodeGenException: Unsupported
> cast from 'ARRAY<INT NOT NULL> NOT NULL' to 'ARRAY<BIGINT NOT NULL> NOT
> NULL'. at
> org.apache.flink.table.planner.codegen.calls.ScalarOperatorGens$.generateCast(ScalarOperatorGens.scala:1295)
> at
> org.apache.flink.table.planner.codegen.ExprCodeGenerator.generateCallExpression(ExprCodeGenerator.scala:703)
> at
> org.apache.flink.table.planner.codegen.ExprCodeGenerator.visitCall(ExprCodeGenerator.scala:498)
> at
> org.apache.flink.table.planner.codegen.ExprCodeGenerator.visitCall(ExprCodeGenerator.scala:55)
> at org.apache.calcite.rex.RexCall.accept(RexCall.java:288){code}
> But the result should be false or true, for example,
> {code:java}
> /Array[1] <> Array[cast(1 as bigint)] -> false
> {code}
>
> BTW, Map and MultiSet type are same as this, If it did, I am pleasure to open
> other issues to track those.
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