Re: Variable substitution in psql backtick expansion - Mailing list pgsql-hackers

> For this case can be nice to have function that returns server version as
> number
>
> some like version_num() .. 10000

Another possible trick to get out of a script which does not support \if,
relying on the fact that the unexpected command is simply ignored:
  -- exit version below 10  \if false    \echo 'script requires version 10 or better'    \q  \endif

Also possible but less informative on errors:
  \set ON_ERROR_STOP on  \if false \endif

-- 
Fabien.