[jira] [Resolved] (FLINK-40989) MAP equality compares numeric values by reference

["Sergey Nuyanzin (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/FLINK-40989?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Sergey Nuyanzin resolved FLINK-40989.
-------------------------------------
    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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