cambyzju opened a new issue, #39740: URL: https://github.com/apache/doris/issues/39740
### Search before asking - [X] I had searched in the [issues](https://github.com/apache/doris/issues?q=is%3Aissue) and found no similar issues. ### Description Step 1: create three tables with same schema, and insert some example data: ``` CREATE TABLE `a` ( `k1` INT NOT NULL, `k2` INT NOT NULL, `v` INT NULL ) ENGINE=OLAP DUPLICATE KEY(`k1`, `k2`) COMMENT 'OLAP' DISTRIBUTED BY HASH(`k1`) BUCKETS 1 PROPERTIES ("replication_num"="1"); CREATE TABLE `b` ( `k1` INT NOT NULL, `k2` INT NOT NULL, `v` INT NULL ) ENGINE=OLAP DUPLICATE KEY(`k1`, `k2`) COMMENT 'OLAP' DISTRIBUTED BY HASH(`k1`) BUCKETS 1 PROPERTIES ("replication_num"="1"); CREATE TABLE `c` ( `k1` INT NOT NULL, `k2` INT NOT NULL, `v` INT NULL ) ENGINE=OLAP DUPLICATE KEY(`k1`, `k2`) COMMENT 'OLAP' DISTRIBUTED BY HASH(`k1`) BUCKETS 1 PROPERTIES ("replication_num"="1"); INSERT INTO a VALUES(1,2,3),(4,5,6); INSERT INTO b VALUES(1,2,3),(4,5,6); INSERT INTO c VALUES(1,2,3),(4,5,6); ``` Step 2: Use one left join like bellow, we found `y.k1=1 ` generated and pushed down to table b ``` > explain shape plan select * from a as x left join b as y on x.k1 = y.k1 where x.k1=1; +-------------------------------------------------------------------------------+ | Explain String(Nereids Planner) | +-------------------------------------------------------------------------------+ | PhysicalResultSink | | --PhysicalDistribute[DistributionSpecGather] | | ----hashJoin[LEFT_OUTER_JOIN] hashCondition=((x.k1 = y.k1)) otherCondition=() | | ------filter((x.k1 = 1)) | | --------PhysicalOlapScan[a] | | ------PhysicalDistribute[DistributionSpecHash] | | --------filter((y.k1 = 1)) | | ----------PhysicalOlapScan[b] | +-------------------------------------------------------------------------------+ ``` Step 3: But if we replace table y with another left join, we found `y.k1=1` only pushed to join node, not pushed to table b and c ``` > explain shape plan select * from a as x left join (select c.k1 as k1 from b left join c on b.k1=c.k1) as y on x.k1 = y.k1 where x.k1=1; +-------------------------------------------------------------------------------------+ | Explain String(Nereids Planner) | +-------------------------------------------------------------------------------------+ | PhysicalResultSink | | --PhysicalDistribute[DistributionSpecGather] | | ----hashJoin[LEFT_OUTER_JOIN] hashCondition=((x.k1 = y.k1)) otherCondition=() | | ------filter((x.k1 = 1)) | | --------PhysicalOlapScan[a] | | ------PhysicalDistribute[DistributionSpecHash] | | --------PhysicalProject | | ----------filter((y.k1 = 1)) | | ------------hashJoin[LEFT_OUTER_JOIN] hashCondition=((b.k1 = k1)) otherCondition=() | | --------------PhysicalProject | | ----------------PhysicalOlapScan[b] | | --------------PhysicalDistribute[DistributionSpecHash] | | ----------------PhysicalProject | | ------------------PhysicalOlapScan[c] | +-------------------------------------------------------------------------------------+ ``` ### Solution _No response_ ### Are you willing to submit PR? - [ ] Yes I am willing to submit a PR! ### Code of Conduct - [X] I agree to follow this project's [Code of Conduct](https://www.apache.org/foundation/policies/conduct) -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org.apache.org For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@doris.apache.org For additional commands, e-mail: commits-h...@doris.apache.org
