Suhan Mao created CALCITE-5720:
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Summary: improve FilterJoinRule to push filter into both join sides
Key: CALCITE-5720
URL: https://issues.apache.org/jira/browse/CALCITE-5720
Project: Calcite
Issue Type: Improvement
Components: core
Reporter: Suhan Mao
In flink source code,
[FlinkFilterJoinRule|https://github.com/apache/flink/blob/master/flink-table/flink-table-planner/src/main/java/org/apache/flink/table/planner/plan/rules/logical/FlinkFilterJoinRule.java],
the FilterJoinRule is improved to handle more cases:
for the above filter of inner/left/right join or the join condition of inner
join, the predicate which field references are all from one side join condition
can be pushed into another join side. Such as:
`SELECT * FROM MyTable1 join MyTable2 ON a1 = a2 AND a1 = 2`
`SELECT * FROM MyTable1, MyTable2 WHERE a1 = a2 AND a1 = 2 `
I would like to add the improvement to exist FilterJoinRule class.
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