Comment by nycdotnet

Agree. With patterns like this you are leaning on your db server’s CPU - among your most scarce resources - versus doing this work on the client on a relatively cheap app server. At query time your app server knows if $2 or $3 or $4 is null and can elide those query args. Feels bad to use a fast language like Rust on your app servers and then your perf still sucks because your single DB server is asked to contemplate all possibilities on queries like this instead of doing such simple work on your plentiful and cheap app servers.