PostgreSQL: How to pass parameters from command line?

Question

I have a somewhat detailed query in a script that uses ? placeholders. I wanted to test this same query directly from the psql command line (outside the script

Answer 1

It would appear that what you ask can't be done directly from the command line. You'll either have to use a user-defined function in plpgsql or call the query from a scripting language (and the latter approach makes it a bit easier to avoid SQL injection).