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Re: how to extract and use a string like a constraint? - Mailing list pgsql-novice

From Tim Landscheidt
Subject Re: how to extract and use a string like a constraint?
Date
Msg-id m3wrt7ghjd.fsf@passepartout.tim-landscheidt.de
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In response to how to extract and use a string like a constraint?  ("Jean-Yves F. Barbier" <12ukwn@gmail.com>)
Responses Re: how to extract and use a string like a constraint?
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"Jean-Yves F. Barbier" <12ukwn@gmail.com> wrote:

> [...]
> and I also don't understand why this don't work:
> SELECT char_length(SELECT chk FROM tstchk WHERE id=1);
> Can it only be use with a temp var into a proc?

You have to use parentheses around the "SELECT" query,
i. e.:

| SELECT char_length((SELECT chk FROM tstchk WHERE id=1));

Tim

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