Backend should send "prepared statement invalidated" messages

[vlsi]

Server-prepared statement might become invalid due to table structure change, column type change, etc. It results in "your prepared statement is no longer valid". This is no fun.

See pgjdbc/pgjdbc#451

[jackc]

Same problem has complicated pgx. In addition, the error code is shared and the error message is localized so its not possible to perfectly detect this error in the driver. See jackc/pgx#1162.