I tried to spawn a new thread for each request and it was embarrassedly slow, maybe I was doing something wrong from my side, but I believe I will settle for a pool.

About the reply the only thing that I see manageable is to include the name of the columns as first row, I was considering the idea but I am not completely sold yet.

I was thinking to bind a particular statement to a key in order to provide the possibility to have standard queries between different clients

  REDISQL.CREATE_STATEMENT insert_user "INSERT INTO users VALUES($1, $2, $3)" 
  > OK
  REDISQL.EXEC_STATEMENT insert_user name, password, email
  > OK

or with multiple insert in the same transaction

  REDISQL.CREATE_TRANSACTION
  > "REDISQL.TRANSACTION_12345"
  REDISQL.EXEC_STATEMENT "REDISQL.TRANSACTION_12345" insert_user name1 password1 email1
  > OK
  REDISQL.EXEC_STATEMENT "REDISQL.TRANSACTION_12345" insert_user name2 password2 email2
  > OK
  REDISQL.EXEC_STATEMENT "REDISQL.TRANSACTION_12345" insert_user name3 password3 email3
  > OK
  REDISQL.COMMIT_TRANSACTION "REDISQL.TRANSACTION_12345"
  > 3 # as the number of statement executed