[ https://issues.apache.org/jira/browse/CALCITE-2204?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Haisheng Yuan resolved CALCITE-2204. ------------------------------------ Fix Version/s: 1.22.0 Resolution: Duplicate Fixed in https://github.com/apache/calcite/commit/e43595482617b1bb991407800c068a0c727e5c17 (CALCITE-3330) > Volcano Planner may not choose the cheapest cost plan > ------------------------------------------------------ > > Key: CALCITE-2204 > URL: https://issues.apache.org/jira/browse/CALCITE-2204 > Project: Calcite > Issue Type: Bug > Reporter: LeoWangLZ > Assignee: Chunwei Lei > Priority: Major > Labels: pull-request-available > Fix For: 1.22.0 > > > Volcano Planner will propagate the cost improvement to parents that one of > the inputs has the best plan. But it not propagate to all parents firstly, it > propagate one parent and go to the parents of parent. In the way, if one > parent may propagate to other parent on the same level, and the cost maybe > less than others, but when propagate the parent again, it will not propagate > because the cost is already calculated, and it's can't be less then the cost > of the self. -- This message was sent by Atlassian Jira (v8.3.4#803005)