Reminiscent opened a new pull request, #20161: URL: https://github.com/apache/doris/pull/20161
…rule ## Proposed changes Support the rewrite rule for push-down filter through sort. We can directly push-down the filter through sort without any conditions check. Before this PR: ``` mysql> explain select * from (select * from t1 order by a) t2 where t2.b > 2; +-------------------------------------------------------------+ | Explain String | +-------------------------------------------------------------+ | PLAN FRAGMENT 0 | | OUTPUT EXPRS: | | a[#2] | | b[#3] | | PARTITION: UNPARTITIONED | | | | VRESULT SINK | | | | 3:VSELECT | | | predicates: b[#3] > 2 | | | | | 2:VMERGING-EXCHANGE | | offset: 0 | | | | PLAN FRAGMENT 1 | | | | PARTITION: HASH_PARTITIONED: a[#0] | | | | STREAM DATA SINK | | EXCHANGE ID: 02 | | UNPARTITIONED | | | | 1:VTOP-N | | | order by: a[#2] ASC | | | offset: 0 | | | | | 0:VOlapScanNode | | TABLE: default_cluster:test.t1(t1), PREAGGREGATION: ON | | partitions=0/1, tablets=0/0, tabletList= | | cardinality=1, avgRowSize=0.0, numNodes=1 | +-------------------------------------------------------------+ 30 rows in set (0.06 sec) ``` After this PR: ``` mysql> explain select * from (select * from t1 order by a) t2 where t2.b > 2; +-------------------------------------------------------------+ | Explain String | +-------------------------------------------------------------+ | PLAN FRAGMENT 0 | | OUTPUT EXPRS: | | a[#2] | | b[#3] | | PARTITION: UNPARTITIONED | | | | VRESULT SINK | | | | 2:VMERGING-EXCHANGE | | offset: 0 | | | | PLAN FRAGMENT 1 | | | | PARTITION: HASH_PARTITIONED: a[#0] | | | | STREAM DATA SINK | | EXCHANGE ID: 02 | | UNPARTITIONED | | | | 1:VTOP-N | | | order by: a[#2] ASC | | | offset: 0 | | | | | 0:VOlapScanNode | | TABLE: default_cluster:test.t1(t1), PREAGGREGATION: ON | | PREDICATES: b[#1] > 2 | | partitions=0/1, tablets=0/0, tabletList= | | cardinality=1, avgRowSize=0.0, numNodes=1 | +-------------------------------------------------------------+ 28 rows in set (0.40 sec) ``` <--Describe your changes.--> ## Further comments If this is a relatively large or complex change, kick off the discussion at [d...@doris.apache.org](mailto:d...@doris.apache.org) by explaining why you chose the solution you did and what alternatives you considered, etc... -- 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 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
