Working with 7.4.3
CREATE TABLE a_preuba (
codigo varchar(2) not null,
descripcion varchar(250) not null,
valor integer,
hora date
);
Function that constructs and returns rowtype:
CREATE OR REPLACE FUNCTION retornar_record(VARCHAR)
RETURNS a_prueba AS '
DECLARE
retorno a_prueba%rowtype;
sbestacodi alias for $1;
BEGIN
SELECT INTO retorno * FROM a_prueba where codigo
= sbestacodi ;
RETURN retorno;
END;
' LANGUAGE plpgsql;
Function that receives rowtype and writes its content
:
CREATE OR REPLACE FUNCTION probar_record(a_prueba)
RETURNS varchar AS '
DECLARE
registro ALIAS FOR $1;
BEGIN
RAISE NOTICE '' Código : % Descripción : % Valor :
% '',
registro.codigo,registro.descripcion,
registro.valor;
RETURN registro.descripcion;
END;
' LANGUAGE plpgsql;
Use of the functions :
1. CREATE OR REPLACE FUNCTION probar()
2. RETURNS text AS'
3. DECLARE
4. reg a_prueba%ROWTYPE;
5. BEGIN
--To initialize a ROWTYPE
6. SELECT * INTO reg FROM retornar_record(''06'');
7. reg.codigo := ''99'';
-- It works within a consultation
8. PERFORM probar_record(t.*)
from a_prueba t
where codigo = ''06'';
-- It works with a function that returns
rowtype
--Directly
9. PERFORM
probar_record(retornar_record(''01''));
--IT DOES NOT WORK
10. PERFORM probar_record(reg);
11. RETURN NULL;
12. END;
13. ' LANGUAGE plpgsql;
If you observe in line 6 and 7 I initialize rowtype
and I modify it but in 10, line treatment to pass it
to the function and says to me that reg is not a
column; The calls in line 8 and 9 funciónan, i find
in some forums and probe but I have not been able to
find nothing for line 10, because I need to modify
rowtype before passing it. Some idea?
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