[jira] [Assigned] (CALCITE-2898) RelOptUtil#splitJoinCondition must consider RexFieldAccess referencing RexInputRef

["Ruben Quesada Lopez (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CALCITE-2898?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Ruben Quesada Lopez reassigned CALCITE-2898:
--------------------------------------------

    Assignee: Ruben Quesada Lopez

> RelOptUtil#splitJoinCondition must consider RexFieldAccess referencing RexInputRef
> ----------------------------------------------------------------------------------
>
>                 Key: CALCITE-2898
>                 URL: https://issues.apache.org/jira/browse/CALCITE-2898
>             Project: Calcite
>          Issue Type: Bug
>    Affects Versions: 1.18.0
>            Reporter: Ruben Quesada Lopez
>            Assignee: Ruben Quesada Lopez
>            Priority: Major
>
> {{RelOptUtil#splitJoinCondition}} "Splits out the equi-join components of a join condition, and returns what's left (remaining join filters that are not equijoins)". This works fine in case of RexInputRef operands in the condition (e.g. $0 = $1), but if any of the operands is a RexFieldAccess referencing a RexInputRef (e.g. $0 = $1.id), then condition will NOT be detected as an equi-join and will be returned as it were a non-equijoin. 
> This can lead to undesired consequences, e.g in {{JoinInfo#of}} which will return NonEquiJoinInfo instead of an EquiJoinInfo.



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