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https://issues.apache.org/jira/browse/FLINK-40989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergey Nuyanzin resolved FLINK-40989.
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Fix Version/s: 2.4.0
Resolution: Fixed
> MAP equality compares numeric values by reference
> -------------------------------------------------
>
> Key: FLINK-40989
> URL: https://issues.apache.org/jira/browse/FLINK-40989
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / Planner
> Affects Versions: 2.3.0, 2.2.1, 1.20.5, 2.4.0
> Reporter: Martijn Visser
> Assignee: Ramin Gharib
> Priority: Critical
> Labels: pull-request-available
> Fix For: 2.4.0
>
>
> Comparing two maps with {{=}} returns FALSE when they hold equal numeric
> values, for example {{MAP['k', d0] = MAP['k', d1]}} with both columns 1.5, or
> INT values outside the Integer cache such as 5000. {{generateMapComparison}}
> in {{ScalarOperatorGens}} reads the values as boxed objects and passes them
> to {{generateEquals}}, which emits {{==}} for numeric and time types, so the
> boxes are compared by reference. MULTISET equality goes through the same
> code. Two {{BinaryRowData}} holding such maps only compare equal because the
> record equaliser compares their bytes.
> We should compare the unboxed values. Casting both values to their primitive
> type before {{generateEquals}} makes all of these TRUE, and
> {{MapFunctionITCase}}, {{CollectionFunctionsITCase}}, {{CastFunctionITCase}}
> and {{JsonFunctionsITCase}} stay green.
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