Regarding parallel queries in ABAP same as in oracle 10g

Question

Hi,
   Is there any way we can write parallel queries in ABAP, in the same way we do in oracle 10g.Kindly see below;
alter table emp parallel (degree 4);
select degree from user_tables where table_name = 'EMP';
select count(*) from emp;
alter table emp noparallel;
SELECT /*+ PARALLEL(emp,4) / COUNT()
FROM emp;
The idea here is to distribute the load of select query in multiple CPUs for load balancing & performance improvement.
Kindly advise.
Thanks:
Gaurav

Answer 1

Hi,
>    Is there any way we can write parallel queries in ABAP, in the same way we do in oracle 10g.
sure. Since it is just a hint...
SELECT *
  FROM t100 INTO TABLE it100
  %_HINTS ORACLE 'PARALLEL(T100,4)'.
will give you such an execution plan for example:
SELECT STATEMENT ( Estimated Costs = 651 , Estimated #Rows = 924.308 )
       4 PX COORDINATOR
           3 PX SEND QC (RANDOM) :TQ10000
             ( Estim. Costs = 651 , Estim. #Rows = 924.308 )
             Estim. CPU-Costs = 33.377.789 Estim. IO-Costs = 646
               2 PX BLOCK ITERATOR
                 ( Estim. Costs = 651 , Estim. #Rows = 924.308 )
                 Estim. CPU-Costs = 33.377.789 Estim. IO-Costs = 646
                   1 TABLE ACCESS FULL T100
                     ( Estim. Costs = 651 , Estim. #Rows = 924.308 )
                     Estim. CPU-Costs = 33.377.789 Estim. IO-Costs = 646
PX = Parallel eXecution...
But be sure that you know what you do with the parallel execution option... it is not scalable.... .
Kind regards,
Hermann