| From: | Karsten Hilbert <Karsten(dot)Hilbert(at)gmx(dot)net> |
|---|---|
| To: | |
| Cc: | pgsql-general <pgsql-general(at)lists(dot)postgresql(dot)org> |
| Subject: | Aw: Additional accessors via the Extension API ? |
| Date: | 2022-02-20 09:23:27 |
| Message-ID: | trinity-4455287d-6da1-4ee4-b4bb-447811798172-1645349006967@3c-app-gmx-bs31 |
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| Lists: | pgsql-general |
> Suppose I have defined an additional type in a PG extension.
>
> Is it possible to add custom accessors to that type -much like jsonb does- but use an API/hook without touching the core PG grammar & parser?
>
> Hypothetical Examples:
>
> Assuming I have a TextFile type I’d like to implement syntax like:
>
> (‘/home/me/a.txt’::TextFile).firstline
> (‘/home/me/a.txt’::TextFile).lastline
> (‘/home/me/a.txt’::TextFile).countlines()
> (‘/home/me/a.txt’::TextFile).size()
> (‘/home/me/a.txt’::TextFile).datemodified()
Off on a tangent but would file_fdw help in any way ?
Karsten
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