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Posted to issues@calcite.apache.org by "ASF GitHub Bot (JIRA)" <ji...@apache.org> on 2019/04/12 07:58:00 UTC
[jira] [Updated] (CALCITE-2992) Make implicit conversions when
generating hash join keys for an equiCondition
[ https://issues.apache.org/jira/browse/CALCITE-2992?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
ASF GitHub Bot updated CALCITE-2992:
------------------------------------
Labels: pull-request-available (was: )
> Make implicit conversions when generating hash join keys for an equiCondition
> -----------------------------------------------------------------------------
>
> Key: CALCITE-2992
> URL: https://issues.apache.org/jira/browse/CALCITE-2992
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Affects Versions: 1.19.0
> Reporter: Lai Zhou
> Priority: Major
> Labels: pull-request-available
>
> Considering follow sql join:
>
> {code:java}
> select t1.*,t2.* from t1 join t2 on t1.intValue=t2.longValue
> {code}
> as known in java :
>
> {code:java}
> Integer intValue = 2;
> Long longValue = 2L;
> Objects.equals(intValue, longValue) = false;
> {code}
> We shoudn't use the orginal Object as a key in the HashMap,
> I think it'd be better to convert hash join keys to string and compare string values.
>
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