Software Environment:

• OpenLooKeng version (source or binary):
  100-RC4
• OS platform & distribution (eg., Linux Ubuntu 16.04):
  Ubuntu 20.04
• Java version:
  1.8.0_252

Describe the current behavior

Currently dynamic filters are created in PredicatePushdown optimizer, and it simply generates dynamic filters for all the JoinNode without considering the selectivity of the build side.

Describe the expected behavior

Dynamic filters shouldn't be created if the build side result has high selectivity