Good morning, >> 1) You are asking Postgres to do what previously you said you did not >> want it to do: >> >> >> https://www.postgresql.org/message-id/CADep2PMJVpVu-ne42yYpqjzGHQ1cunvX92Oo6_hNLfgrj%2BMa_Q%40mail.gmail.com >> >> " You are looking for Postgres to >> > follow its responses all the way through the software stack and tell >> you >> > if the response is being misused. That is not going to happen. >> For God sake! No, I am not! As soon as the correct data left the >> PG-space in the format that the statement requested, and the KEY was >> not NULL, of course, I do not blame PG." No, I am asking PG to send the response in a "language" the client can understand. Do not try to fool me! - A friend of mine who has no PC and internet connection asks me to send a message to the list. - I send the message in english to the list. I am the one who initiated the conversation as a client. - "You" respond to my message as a server. And you "respond" in english. Why? Because, you correctly assumed that I understand english, too. After your response in English, for me it is de facto that you speak english, and our conversation will continue in english. - I receive your message in English and send it to my friend to read it. - ... - Upon my friend´s sixth message, "you" suddenly change idioma and respond in german. - Then, I do not understand and send to my friend "ERROR: message received in german! By the way, this is a correct message! A wrong message would be: "Your message is NULL"! Does it remind you something? ;) So, "You" are not responsible what message I have sent to my friend; and, of course, you do not have to follow what happens after you have sent your response! "You" do not have to do with my friend. But, it is obvious that you are responsible for the sudden change of the language. So, I come back and complain why "you" have changed language. "You" tell me that I have to learn german if I want to send more than 5 messages to "you", because within "you" a language change occurs as you have been recently upgraded! The most honest and straight answer was the short version: "The above is not going to happen." As regards 2), I do not have the knowledge to respond. So, I leave it to the judgement of the readers, if it is true or not. Have all of you a nice month and day! Tia