Hi: Your are right. Thanks a lot for your help
Best Jocean.shi Vladimir Sitnikov <[email protected]> 于2019年3月20日周三 下午8:42写道： > Jocean.shi> The result of this method is aways infinity > > Are you using Convention.NONE? > VolcanoPlanner assigns infinite cost for all the relations with Logical > convention (==Convention.NONE), so it is probably the reason. > > If you want to perform cost-based optimization, you probably want to > implement your own set of RelNodes and your own Convention. > > The relevant issue is https://issues.apache.org/jira/browse/CALCITE-2827 > > Vladimir >
