Hello David,

We have \gset to set some parameters, but not ones in the environment,
so I fixed this with a new analogous command, \gsetenv. I considered
refactoring SetVariable to include environment variables, but for a
first cut, I just made a separate function and an extra if.

My 0.02€: ISTM that you do not really need that, it can already be achieved with gset, so I would not bother to add a gsetenv.

  sh> psql
    SELECT 'Calvin' AS foo \gset
    \setenv FOO :foo
    \! echo $FOO
    Calvin

--
Fabien.

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