joao-r-reis commented on code in PR #1915:
URL: 
https://github.com/apache/cassandra-gocql-driver/pull/1915#discussion_r2459960771


##########
session.go:
##########
@@ -199,6 +186,20 @@ func NewSession(cfg ClusterConfig) (*Session, error) {
        }
        s.connCfg = connCfg
 
+       if cfg.PoolConfig.HostSelectionPolicy == nil {
+               cfg.PoolConfig.HostSelectionPolicy = RoundRobinHostPolicy()
+       }
+       s.pool = cfg.PoolConfig.buildPool(s)
+       s.policy = cfg.PoolConfig.HostSelectionPolicy
+
+       // set the executor here in case the policy needs to execute queries in 
Init

Review Comment:
   I feel like this use case is so niche that it would be better to tell those 
users to implement a policy with "two states" and the user is responsible for 
changing the state of that policy when they create a session



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