Creating Table User Defined Functions

Add the input parameter called IM_FDATE as well as the RETURN Table parameter as shown. Please note the scalar input parameter we will used later on for filtering.

FUNCTION "get_po_counts" ( im_fdate DATE )
 RETURNS TABLE (EMAIL NVARCHAR(255),
	       FULLNAME NVARCHAR(255),
	       CREATE_CNT INTEGER,
	       CHANGE_CNT INTEGER,
	       COMBINED_CNT INTEGER)
    LANGUAGE SQLSCRIPT
    SQL SECURITY INVOKER AS
BEGIN


END;

Copy the logic from the procedure get_po_header_data into the body of the function. Make sure to only copy the code between the BEGIN and END statements

Add to the WHERE clauses in the first two SELECT statements for filtering by month. Month is captured from the input parameter im_fdate.

In the third SELECT statement, change the name of the intermediate table variable to EMP_PO_COMBINED_CNT to match the variable name to the semantics of the query

Also add the EMAIL column to the field list.

Remove the LIMIT clause at the end.

Finally, add a RETURN SELECT statement at the end to mark the to be returned result set of the function.

The completed code should be very similar to this.

FUNCTION "get_po_counts"( im_fdate DATE )
 RETURNS TABLE (EMAIL NVARCHAR(255),
	       FULLNAME NVARCHAR(255),
	       CREATE_CNT INTEGER,
	       CHANGE_CNT INTEGER,
	       COMBINED_CNT INTEGER)
    LANGUAGE SQLSCRIPT
    SQL SECURITY INVOKER AS
BEGIN

po_create_cnt =  SELECT COUNT(*) AS CREATE_CNT, "CREATEDBY" as EID
     FROM "OPENSAP_PURCHASEORDER_HEADERS" WHERE ID IN (
                     SELECT "POHEADER_ID"
                          FROM "OPENSAP_PURCHASEORDER_ITEMS"
          WHERE "PRODUCT_PRODUCTID" IS NOT NULL)
                 AND MONTH("CREATEDAT") = MONTH(:im_fdate)
            GROUP BY  "CREATEDBY";

po_change_cnt = SELECT COUNT(*) AS CHANGE_CNT, "MODIFIEDBY" as EID
     FROM "OPENSAP_PURCHASEORDER_HEADERS"  WHERE ID IN (
                     SELECT "POHEADER_ID"
                          FROM "OPENSAP_PURCHASEORDER_ITEMS"
          WHERE "PRODUCT_PRODUCTID" IS NOT NULL)
                AND MONTH("MODIFIEDAT") = MONTH(:im_fdate)
             GROUP BY  "MODIFIEDBY";

EMP_PO_COMBINED_CNT =
        SELECT EMAIL, "get_full_name"( "NAMEFIRST", "NAMEMIDDLE", "NAMELAST") as FULLNAME,
         crcnt.CREATE_CNT, chcnt.CHANGE_CNT,  crcnt.CREATE_CNT +
         chcnt.CHANGE_CNT AS COMBINED_CNT
            FROM "OPENSAP_MD_EMPLOYEES" as emp
            LEFT OUTER JOIN :PO_CREATE_CNT AS crcnt
             ON emp.email = crcnt.EID
           LEFT OUTER JOIN :PO_CHANGE_CNT AS chcnt
           ON emp.email = chcnt.EID
          ORDER BY COMBINED_CNT DESC;

return select * from :emp_po_combined_cnt;

END;

Save the function.

Perform a Deploy

Return to the Database Explorer page. Select the Functions folder. Right-click on the get_po_counts function and choose Generate SELECT statement.

A new SQL tab will be opened with a SELECT statement. Enter the date 18.12.2014 as the input parameter and add LIMIT 3 at the end of it. Click Run.

SELECT * FROM "get_po_counts"('18.12.2014') LIMIT 3;