morningman commented on pull request #6861:
URL: https://github.com/apache/incubator-doris/pull/6861#issuecomment-954004592


   > I got your point but one more thing I m not sure is whether open phase of 
scan node will be completed before RF is generated. For example, open() in 
`OlapScanNode` will be blocked until all RFs are ready. So it seems like scan 
node will execute with RFs without performance degradation.
   
   Sounds reasonable to me. Currently, scan node will be blocked until runtime 
filter is ready. And for other nodes, it is ok to do the open phase without 
waiting for the runtime filter.
   cc @stdpain @EmmyMiao87 


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