<transcript><audio_70>has emitted all of the tuples so we need to we need to go over all the tuples in r and build up the hash table and then then only then we can start executing the uh right fa the the right side of the the join which is the probe phase so</transcript><transcript><audio_71>uh there are certain operators for which um we we need to wait until all of the until the children have returned all of the uh the tuples um and finally the the other thing that that works really nicely in this</transcript><transcript><audio_72>approach is output control so things like a limit clause it's really easy uh to to stick a limit clause in in here you just essentially stick it on the top and say i only want to call uh the the next function of the</transcript> has emitted all of the tuples so we need to we need to go over all the tuples in r and build up the hash table and then then only then we can start executing the uh right fa the the right side of the the join which is the probe phase so uh there are certain operators for which um we we need to wait until all of the until the children have returned all of the uh the tuples um and finally the the other thing that that works really nicely in this approach is output control so things like a limit clause it's really easy uh to to stick a limit clause in in here you just essentially stick it on the top and say i only want to call uh the the next function of the
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