[CALCITE-7755] Support IEJoin for inequality joins - #5233
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Jira Link
CALCITE-7755
Changes Proposed
IEJoin is an algorithm for joins with two inequality predicates, described in “Lightning Fast and Space Efficient Inequality Joins,” PVLDB 8(13), 2015.
This change adds an IEJoin implementation for the Enumerable convention. It applies to inner joins with at least two inequality predicates between fields from the two inputs. IEJoin handles the first two predicates; any remaining predicates are evaluated by an EnumerableCalc. Other join conditions are left to the existing rules.
Planner and execution tests are included.