Ruben Quesada Lopez created CALCITE-2898:
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Summary: 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
{{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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