Re: Using bind vars, ref cursors and dynamic SQL

From: andrewst <member14183_at_dbforums.com>
Date: Wed, 02 Jul 2003 14:59:20 +0000
Message-ID: <3066994.1057157960@dbforums.com>

Originally posted by Mark
> Hello,
>
> I'm trying to return values from my database using ref cursors,
> dynamic SQL
> and bind variables, but I cannot seem to get the syntax right.
>
> It looks like this currently:
>
> /*
> rec_services is declared thusly: TYPE rec_services IS REF CURSOR;
> */
> FUNCTION my_function
> (pv_param1 IN VARCHAR2
> ,pv_param2 IN VARCHAR2
> )
> RETURN rec_services
> IS
> vr_service rec_services;
> BEGIN
>
> /*
> pv_param1 contains 'LIKE (..., ..., ...)'
> */
> EXECUTE IMMEDIATE
> 'DECLARE '||
> 'CURSOR cur_records IS '||
> 'SELECT ss.col1'||
> ', ss.col2'||
> 'FROM my_view ss '||
> 'WHERE ss.col1 :b1 '||
> 'AND ss.col2 = :b2 '||
> 'ORDER BY ss.col1;'||
> 'BEGIN '||
> 'OPEN cur_records;'||
> 'FETCH cur_records '||
> 'INTO :b3'||
> ', :b4;'||
> 'CLOSE cur_records;'||
> 'END;'
> USING IN pv_param1
> , IN pv_param2
> , OUT vr_service.col1
> , OUT vr_service.col2
> ;
>
> RETURN vr_service;
>
> END my_function;
>
> The error I am getting is:
>
> PLS-00487: Invalid reference to variable 'VR_SERVICE'
>
> Thanks for any assistance,
>
> Mark

Your code is trying to treat vr_service as a variable of type RECORD(col1,col2) which it is not.

I think this is what you meant to do:

/*
rec_services is declared thusly: TYPE rec_services IS REF CURSOR; */
FUNCTION my_function
(pv_param1 IN VARCHAR2
,pv_param2 IN VARCHAR2
)
RETURN rec_services
IS
vr_service rec_services;
BEGIN /*
pv_param1 contains 'LIKE (..., ..., ...)' */
OPEN vr_service FOR

'SELECT ss.col1'||
', ss.col2'||
'FROM my_view ss '||
'WHERE ss.col1 :b1 '||
'AND ss.col2 = :b2 '||
'ORDER BY ss.col1'

USING IN pv_param1
, IN pv_param2
;

RETURN vr_service;

END my_function;

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Received on Wed Jul 02 2003 - 09:59:20 CDT