Method expr_perm_pool

be/src/exec/exec-node.h:353–353

  MemTracker* mem_tracker() { return mem_tracker_.get(); }
  MemTracker* expr_mem_tracker() { return expr_mem_tracker_.get(); }
  MemPool* expr_perm_pool() { return expr_perm_pool_.get(); }
  MemPool* expr_results_pool() { return expr_results_pool_.get(); }
  const TBackendResourceProfile& resource_profile() { return resource_profile_; }
  bool is_closed() const { return is_closed_; }