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type cast for ERROR: function chr(double precision) does not exist???

Hello everybody,

i get strange error messages when trying to call up my function

with a SELECT functionname(with or without int);

varying from:

ERROR: function chr(double precision) does not exist
ERROR: function FUNCTIONNAME() does not exist

the problem maybe :
SELECT chr(trunc((random()*26)+65))
is there anything i need to type cast?

i have tried several

in particularly every possible row ;-)

anzahl alias for $1;
i int4;
zeichen char(1);
zufallstext text;
entries int8;
zufallstext := '';
for i in 1..anzahl LOOP
SELECT chr(trunc((random()*26)+65)) INTO zeichen;
zufallstext := zufallstext || zeichen;
SELECT count(*) INTO entries FROM se_errorcode
WHERE entry = zufallstext;
EXIT WHEN entries = 0;
RETURN zufallstext;

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Nov 23 '05 #1
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