From: Constantin Teodorescu <teo@flex.ro>
To: Constantin Teodorescu <teo@flex.ro>
Cc: Tom Lane <tgl@sss.pgh.pa.us>
Cc: PostgreSQL Interfaces <pgsql-interfaces@postgresql.org>
Subject: Re: What's wrong in this pltcl function ?
Date: Mon, 14 Oct 2002 17:34:47 +0300
Message-ID: <3DAAD607.1040009@flex.ro> (raw)
References: <3DAA8ADB.6060208@flex.ro>
<12147.1034605407@sss.pgh.pa.us>
<3DAAD536.8030603@flex.ro>
Constantin Teodorescu wrote:
> Tom Lane wrote:
>
>> Constantin Teodorescu <teo@flex.ro> writes:
>>
>>
>>> create function ruldeb(bpchar) returns bpchar as '
>>> set cont $1
>>> set rulaj 0.0
>>> spi_exec -array rec "select valoare from valori where debitor
>>> LIKE \'$cont%\'" {
>>> set rulaj [expr {$rulaj + $rec(valoare)}]
>>> }
>>> if {![info exists GD(conturi_lookup)]} {
>>> set GD(conturi_lookup) [spi_prepare "select cheie,denumire
>>> from conturi where id=\'\\$1\'" [list bpchar]]
>>> }
>>> spi_execp -count 1 $GD(conturi_lookup) [list $cont]
>>> return "{$cheie} {$denumire} $rulaj"
>>> ' LANGUAGE 'pltcl';
>>>
>>
>>
>>
>>
>>
>>> is giving the following error:
>>>
>>
>>
>>
>>
>>> ERROR: pltcl: can't read "cheie": no such variable
>>> can't read "cheie": no such variable
>>>
>>
>>
>> I think what is happening is that the select is returning zero rows, and
>> so none of the output variables get set. You should be checking that
>> spi_execp returns a value greater than 0 before trying to use the column
>> variables.
>>
>> As for *why* the select returns zero rows, I think you want the query
>> to read like
>> ... where id=\\$1"
>> As is, it's always looking for the literal id value $1.
>>
>>
>
> I have replaced:
> ... where id=\'\\$1\'
> with
> ... where id=\\$1
>
> and the error is now:
> ERROR: Unable to identify an operator '=$' for types 'character
> varying' and 'integer'
> You will have to retype this query using an explicit cast
>
> when I call the function like that:
>
> select ruldeb('4:0:1:1:2:');
>
> -------------
> I have to say that that account '4:0:1:1:2:' exists in the "conturi"
> table!
> As I said it previously, the query works fine directly (spi_exec)
> without the preparing stuff!
>
> teo
Trying different versions for backspashing I found that the formula that
works is:
... where id=\'\$1\'
So without double backslashing the $ sign (thought I copied that example
from a PostgreSQL documentation)
Thanks,
Teo
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To: pgsql-interfaces@postgresql.org
Cc: teo@flex.ro, tgl@sss.pgh.pa.us
Subject: Re: What's wrong in this pltcl function ?
In-Reply-To: <3DAAD607.1040009@flex.ro>
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