Performance issue using Native SQL

Question

Hi
    I am getting the data from Oracle database using Native SQL in ABAP. I am facing performance problem when i am using Native SQL to get data from Oracle database.Its been very slow and getting timed out.
This is the code i am using for this.
EXEC SQL PERFORMING BUILD_TAB.
Get the territory id
    SELECT TERR_ID
      FROM DWPROD.VW_ARDETAIL_PRD1@DWP
      INTO :IT_TERR-TERR_ID
           :DG_TERR_ID
     WHERE COMPANY     = :dt_output-bukrs
       AND PAY_ADDR_ID = :dt_output-kunnr
       AND DOC_NO      = :dt_output-belnr
       AND DOC_ITEM_NO = :dt_output-buzei
  ENDEXEC.
  IF sy-dbcnt >= 1.
    READ TABLE it_terr INDEX 1.
    dg_terr_id = it_terr-terr_id.
    EXEC SQL.
Get the Saled rep id, name
      SELECT MR_USER_ID,
             MR_NAME
        FROM DWPROD.VW_TERR@DWP
        INTO :dt_output-srep_id,
             :dt_output-srep_name
       WHERE TERR_ID = :DG_TERR_ID
    ENDEXEC.
*Get sales manager id and sales manager name
    EXEC SQL.
      SELECT SALES_GRP_ID
        FROM DWPROD.VW_TERRRPT@DWP
        INTO :DG_SGRPID
       WHERE TERR_ID = :DG_TERR_ID
    ENDEXEC.
    IF sy-dbcnt >= 1.
      EXEC SQL.
        SELECT MGR_USER_ID,
               MGR_NAME
          FROM DWPROD.VW_SGRP@DWP
          INTO :dt_output-sman_id,
               :dt_output-sman_name
         WHERE SALES_GRP_ID = :DG_SGRPID
      ENDEXEC.
    ENDIF.
  ENDIF.
Can any one suggest a solution to improve the performance.
Thnaks
Vianney

Answer 1

Hi John!
Looks like you need just one entry out of the tables, but you select 'into table'.
Try to add a 'up to 1 rows' restriction, then Oracle will be much faster with the execution.
To get an idea, who this parameter looks like in native SQL for Oracle, write a simple test program with an open SQL statement (including this parameter / select single) and run a SQL-trace (ST05). Here you can see in 'explain' how native translation looks like, can also maintain some small tests with 'enter SQL statement'.
Regards,
Christian