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Oracle stored functions

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  • #16
    Re: Oracle stored functions

    yes, i know the above stored function REFCURSOR_EMP runs in SQLPLUS with:

    var refcur refcursor
    exec :refcur := REFCURSOR_EMP(1000, 10000);
    print refcur
    Last edited by HarryT; 02-03-2010, 11:08 AM.


    • #17
      Re: Oracle stored functions

      How about trying this, then?

      sqlStatement = <<%sql%
      SELECT COUNT_EMP(:from, :to)
      ' these employee numbers are just examples
      dim args as sql::arguments
      'Execute the Query
      flagResult = cn.Execute(sqlStatement,args)
      if flagResult = .f. then
      end if
      dim rs as sql::resultset
      rs = cn.ResultSet"l_count")
      I think it's just a matter of figuring out how to call the function. How is it done in php for Oracle?


      • #18
        Re: Oracle stored functions

        Oracle's syntax to execute only a function in a select list is:
        sqlStatement = <<%sql%
        SELECT COUNT_EMP(:from, :to) FROM DUAL

        the new error is:
        Script:anzahl line:32"l_count")
        Column not found while getting result set data column.'

        Got this coding running with Oracle 10g and AlphaFive V10:
        dim conn as SQL::Connection
        dim sql as C
        dim vEmpNo as C
        dim args as SQL::Arguments
        vEmpNo = ui_get_text("vEmpNo", "Show Emp")
        sql = "select * from emp where empno >= :empno"
        if .not."::Name::MyOracleConnect")
        ui_msg_box("Error", conn.CallResult.text)
        end if
        if .not. args.Set("empno", vEmpNo)
        end if
        if .not. conn.execute(sql, args)
        ui_msg_box("Error", conn.CallResult.text)
        end if

        changed SQL to:
        sql = "select count_emp(:empno,10000) from dual"
        And this was als running.

        But how to EXECUTE/CALL an Oracle "stored function/procedure"
        with IN/OUT parameters, RETURN values and REFCURSOR?

        e.g. "return:= count_emp(:from_IN,:to_IN,:ename_OUT)"
        for "return" values of type NUMBER,CHAR,REFCURSOR
        Last edited by HarryT; 02-03-2010, 11:47 AM.


        • #19
          Re: Oracle stored functions

          I just checked syntax for calling an Oracle function via php, and it looks like the syntax is much the same as the Alpha syntax:

          $query =
           "SELECT employee_id,
                   substr(first_name,1,1) || '. '|| last_name as employee_name,
                   to_char(salary, '9999G999D99') as salary,
                   nvl(commission_pct,0) as commission_pct,
                   to_char([COLOR="Red"]calc_remuneration[/COLOR](salary, commission_pct),'9999G999D99')
                     [COLOR="Red"]as remuneration[/COLOR]
            FROM employees
            WHERE department_id = :did
            ORDER BY employee_id ASC";
          In this code (from, calc_remuneration() is an Oracle function, ans the result is redefined "as renumeration" for PHP.
          So your function should work for
          SELECT EMP_COUNT(1,100) as employeeCount

          As I wrote before, I don't have Oracle to test, but stored functions work fine in MySQL, and I can't think why they should not work in Oracle.


          • #20
            Re: Oracle stored functions

            please see my last post.

            You are right:
            "sql = "select count_emp(:empno,10000) from dual"
            is running, but with "FROM DUAL" for correct Oracle syntax.

            This is a solution by calling the function in a "select list".
            But there must be also a solution with a "direct CALL" like
            return := called_function(p_IN,p_OUT)

            with IN/OUT parameters and return type of NUMBER,CHAR,BOOLEAN,REFCURSOR


            • #21
              Re: Oracle stored functions

              Please note,
              a function can return only one value but can take more than one IN parameter but no OUT parameters.

              If you use:
              sql = "select ename_emp(:empno,:ename) from dual"
              with :empno as IN and :ename as OUT parameter
              Alpha Five errors with:
              'ORA-06572: Function ENAME_EMP has out arguments'

              Explanation of the Oracle error:
              Error: ORA 6572
              Text: function <name> has out arguments
              Cause: A SQL statement references either a packaged or a stand-alone PL/SQL function that contains an OUT parameter in its argument list.
              PL/SQL functions referenced by SQL statements must not contain the OUT parameter.
              Action: Recreate the PL/SQL function without the OUT parameter in the argument list.

              That's why you need a call like:
              SQLstatement = <<%sql%
              :return_value := called_function(:IN_param,:OUT_param,...)

              How could you do it in Xbasic with AlphaFive V10?


              • #22
                Re: Oracle stored functions

                Sorry, it should read:
                a function "IN A SELECT STATEMENT" can return only one value but can take more than one IN parameter but no OUT parameters.

                How to call a Oracle "stored function" with IN/OUT parameters in Alpha Five V10?
                sqlStatment = ":return_value := called_function :IN_param,:OUT_param,...)"

                Also for :return_value of type REFCURSOR.

                No one?