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https://issues.apache.org/jira/browse/CALCITE-7689?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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ASF GitHub Bot updated CALCITE-7689:
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Labels: pull-request-available (was: )
> MAP equality compares maps by insertion order
> ---------------------------------------------
>
> Key: CALCITE-7689
> URL: https://issues.apache.org/jira/browse/CALCITE-7689
> Project: Calcite
> Issue Type: Bug
> Components: core
> Affects Versions: 1.42.0
> Reporter: Mihai Budiu
> Priority: Minor
> Labels: pull-request-available
>
> The runtime implements MAP values as LinkedHashMap. Two such maps are equal
> only if keys were inserted in the same order. I believe that the SQL
> semantics would require checking that two maps have the same keys and map
> these keys to correspondingly equal values:
> {code:java}
> SELECT MAP[1, 2, 3, 4] = MAP[3, 4, 1, 2]; {code}
> should evaluate to TRUE (today it evaluates to FALSE).
> Regarding NULLs, today ARRAY values use IS NOT DISTINCT FROM, so probably MAP
> equality should use the same semantics (i.e. MAP[1, NULL] = MAP[1, NULL]
> should evaluate to TRUE and not to UNKNOWN).
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