[jira] [Created] (CALCITE-5720) improve FilterJoinRule to push filter into both join sides

["Suhan Mao (Jira)" <ji...@apache.org>]

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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