function parameters : bug?

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От Richard Hayward
Тема function parameters : bug?
Дата
Msg-id ugu1d19614tuteki2jgm0496d58kcggdhn@4ax.com
обсуждение исходный текст
Ответы Re: function parameters : bug?  (Richard Huxton <dev@archonet.com>)
Список pgsql-sql
pg 8.0.3
This behaviour seems odd to me:

CREATE TABLE mytable ( inta INTEGER
);

CREATE OR REPLACE FUNCTION myfunction (inta integer) RETURNS integer 
AS 
$body$ 
begin insert into mytable(inta) values (inta); return(0);
end;
$body$
LANGUAGE 'plpgsql';

select myfunction(123);

ERROR:  syntax error at or near "$1" at character 22
QUERY:  insert into myTable( $1 ) values ( $2 )
CONTEXT:  PL/pgSQL function "myfunction" line 2 at SQL statement

The problem is with the line in my myfunction: insert into mytable(inta) values (inta);

The server doesn't like the field name being the same as the name of
the function parameter. I don't see why, as I can see no opportunity
for ambiguity.

Problem vanishes with a different function parameter name:

CREATE OR REPLACE FUNCTION myfunction (my_inta integer) RETURNS
integer 
AS $body$ begin insert into myTable(inta) values (my_inta); return(0);
end;
$body$
LANGUAGE 'plpgsql'


But, this means that if I change the design of my tables, I have to
possibly change my function headers rather than merely the code inside
them.

regards
Richard






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