From: | Marcus Engene <mengpg(at)engene(dot)se> |
---|---|
To: | pgsql-novice(at)postgresql(dot)org |
Subject: | Re: Error |
Date: | 2005-12-01 18:23:11 |
Message-ID: | 438F3F8F.3030006@engene.se |
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Thread: | |
Lists: | pgsql-novice |
> it says...
>
> ERROR: relation "t_customer_cust_id_seq" does not
> exist
>
> i'm off to hunt down the actual name of the sequence.
>
> bottom line - if you get a boolean response, check to
> see if the query has failed first.
>
> thank you for the insight.
Quite a few functions in php do this. If you use the
syntax == or != it is C-style compare. That is, zero
is false and basically the rest is true.
If you use === or !== it evaluates to true if both
the types are equal AND the statement is true.
So, the correct syntax would be
if (false === ($customer_id = $db->getone("..."))) {
error handling.
}
Example from the manual:
// in PHP 4.0b3 and newer:
$pos = strrpos($mystring, "b");
if ($pos === false) { // note: three equal signs
// not found...
}
By doing this, strrpos can return 0 (not an error) or
false (not found). Without === strrpos would have to
return -1 or some other illegal position for not found.
Best regards,
Marcus
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