is it possible to execute a dynamic piece of sql within plsql and return the results into a sys_refcursor? I have pasted my attempt soo far, but dosnt seam to be working, this is the error im getting throught my java app
ORA-01006: bind variable does not exist ORA-06512: at "LIVEFIS.ERC_REPORT_PK", line 116 ORA-06512: at line 1
but that could be somthing misconstrued by java, everything seams to compile fine soo im not sure.
procedure all_carers_param_dy (pPostcode in carer.postcode%type, pAge Number
,pReport out SYS_REFCURSOR) is
begin
declare
lsql varchar2(500) :='SELECT c.id FROM carer c, cared_for cf,carer_cared_for ccf '
||' where c.id = ccf.carer_id (+)'
||' AND cf.id (+) = ccf.cared_for_id';
begin
if pPostcode is not null and pAge <= 0 then
lsql := lsql||' AND c.postcode like ''%''|| upper(pPostcode)||''%''';
elsif pPostcode is null and pAge > 0 then
lsql := lsql||' AND ROUND((MONTHS_BETWEEN(sysdate,c.date_of_birth)/12)) = pAge';
elsif pPostcode is not null and pAge > 0 then
lsql := lsql ||' AND ROUND((MONTHS_BETWEEN(sysdate,c.date_of_birth)/12)) = pAge'
||' AND c.postcode like ''%''|| upper(pPostcode)||''%''';
end if;
execute immediate lsql
into pReport;
end;
end;
Im new to plsql and even newer to dynamic sql soo any help/ suggestions would be greatly apreciated.
Thanks Again
Jon
To run a dynamic SQL statement, run the stored procedure sp_executesql as shown below : EXEC sp_executesql N'SELECT statement'; Use prefix N with the sp_executesql to use dynamic SQL as a Unicode string.
You can't execute dynamic sql in user defined functions. Only functions and some extended stored procedures can be executed from within a function.
Answer: Here is an example script that performs dynamic SQL and returns the data as a ref cursor.
You can use only a DDL COMMENT statement as dynamic SQL in a stored procedure. You cannot specify a DML COMMENT statement to fetch the comments for database objects, columns of a table, and parameters. A CREATE DATABASE or CREATE USER statement used as dynamic SQL in a stored procedure must contain the FROM clause.
you will have to bind the parameters pAge
and pPostcode
. In dynamic SQL you would prefix them with a colon (:
). If you use EXECUTE IMMEDIATE
or OPEN ... FOR
, you will bind your parameters via position, this is why I renamed them :P1 and :P2 in the example:
DECLARE
lsql VARCHAR2(500) := 'SELECT c.id
FROM carer c, cared_for cf, carer_cared_for ccf
WHERE c.id = ccf.carer_id (+)
AND cf.id (+) = ccf.cared_for_id';
BEGIN
IF pPostcode IS NULL THEN
lsql := lsql || ' AND :P1 IS NULL';
ELSE
lsql := lsql || ' AND c.postcode like ''%''|| upper(:P1)||''%''';
IF pPostcode pAge > 0 THEN
lsql := lsql || ' AND :P2 = ROUND((MONTHS_BETWEEN(sysdate,
c.date_of_birth)/12))';
ELSE
lsql := lsql || ' AND nvl(:P2, -1) <= 0';
END IF;
OPEN pReport FOR lsql USING pPostcode, pAge;
END;
Note: The number and position of bind variables has to be known at compile time, this is why I often use the construct above (adding the parameter to its position even if it is not used). Adding a tautology (as in AND :P1 IS NULL
) to a query won't affect its explain plan.
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