| From: | "David G(dot) Johnston" <david(dot)g(dot)johnston(at)gmail(dot)com> |
|---|---|
| To: | Murthy Nunna <mnunna(at)fnal(dot)gov> |
| Cc: | Pgsql-admin <pgsql-admin(at)lists(dot)postgresql(dot)org> |
| Subject: | Re: Having trouble passing a shell variable to a query from psql command line |
| Date: | 2025-08-29 17:58:03 |
| Message-ID: | CAKFQuwaAeF52LOpxjUUH0F3PN3w2CX8J-HJ=rV5wrzp1iyL=cQ@mail.gmail.com |
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| Lists: | pgsql-admin |
On Fri, Aug 29, 2025 at 10:52 AM Murthy Nunna <mnunna(at)fnal(dot)gov> wrote:
>
> psql -d mydb -t -A -c "SELECT relkind FROM pg_class WHERE relname =
> :'SHELL_VAR' ;" -v SHELL_VAR="$SHELL_VAR"
>
> ERROR: syntax error at or near ":"
>
> LINE 1: SELECT relkind FROM pg_class WHERE relname = :'SHELL_VAR' ;
>
> ^
>
> Is psql script necessary to pass shell variable?
>
>
> I appreciate any help you can provide.
>
I provide the documentation. Under psql -c:
"command must be either a command string that is completely parsable by the
server (i.e., it contains no psql-specific features)"
Variable-substitution is a psql-specific feature.
David J.
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