Re: Interpolation of environment variables in SQL at runtime?

Andy Gimblett <A.M.Gimblett@swansea.ac.uk> writes:
> Question: is there any way to use environment variables (or something
> similar) in my saved SQL code, and have them expanded at runtime?

Only by preprocessing the script.  Have you considered something like

cat <<EOF
... WHERE $foo = ...
EOF | psql ...

            regards, tom lane