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call by reference vs call by value - Mailing list pgsql-sql

From Michael Moore
Subject call by reference vs call by value
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Msg-id CACpWLjMRO2u472yK+cgq0+BotJpsbuGxn6Kzea=SDLsYBxJkhg@mail.gmail.com
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Responses Re: call by reference vs call by value  ("David G. Johnston" <david.g.johnston@gmail.com>)
Re: call by reference vs call by value  (Pavel Stehule <pavel.stehule@gmail.com>)
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How are variables in pg/psql functions passed? I'm sure this is documented somewhere. I looked but no joy. A link would be great! TIA
Mike

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