Calling Oracle stored procedure with output parameter from SQL Server

Question

I have an Oracle linked server in SQL Server 2008 R2. I need to execute Oracle stored procedures (with output parameter in first, and input parameter in second procedure):

CREATE OR REPLACE PROCEDURE my1.spGetDate(CurrentDate OUT VARCHAR2)
IS
BEGIN
-- set output parameter, no select statements
END;

CREATE OR REPLACE PROCEDURE my1.spDeleteOldRecords(CurrentDate IN VARCHAR2)
IS
BEGIN
-- conditional delete from oracle table, no select statements
END;

I didn't found any complete documentation on this question, only simple examples with parameterless select/nonselect procedures, and want to know, how to call these procedures, procedures with select inside, multiparameter procedures with basic parameter types.

Answer 1

It should work like this:

DECLARE @dateval DATETIME

EXECUTE ('begin my1.spGetDate(?); end;', @dateval OUTPUT) AT ORA_DBLINK_NAME;

EXECUTE ('begin my1.spDeleteOldRecords(?); end;', @dateval) AT ORA_DBLINK_NAME;

If you have several parameters, it could look like this:

EXECUTE ('begin my1.spProc(?,?,?,?); end;', @param_in_1, @param_in_2, @param_out_3 OUTPUT, @param_out_4 OUTPUT) AT DBLINK_NAME;

Answer 2

Use REF CURSOR and declare that cursor as an output variable in oracle. Using Ref Cursor you can retrieve result set from Oracle Stored procedure