Performance of the select query

Question

i want to know wheter the conversion of  the select query
SELECT  * FROM mchb                        
        WHERE matnr EQ mch1-matnr
        AND   charg EQ mch1-charg
        AND   werks EQ plant-werks.
        itab-lgort = mchb-lgort.
        itab-clabs = mchb-clabs.
        APPEND itab.
      ENDSELECT.
into following pattern
select lgort clabs
       from mchb
       into corresponding fields of itab
       WHERE matnr EQ mch1-matnr
       AND   charg EQ mch1-charg
       AND   werks EQ plant-werks.
       ENDSELECT.
will give  the same results ?

Answer 1

Hi,
It will results in performance issue because of end select statement.
select lgort clabs
     from mchb
        into table itab
        WHERE matnr EQ mch1-matnr
              AND charg EQ mch1-charg
              AND werks EQ plant-werks.
Use like this you will get the values of lgort and clabs in the internal table itab.
Then use loop statement to use that values further.
Dont use end select it will be a performance issue.
In this code there is no need to use of ENDSELECT and use corresponding fields of table itab.
select lgort clabs
from mchb
into corresponding fields of itab
WHERE matnr EQ mch1-matnr
AND charg EQ mch1-charg
AND werks EQ plant-werks.
ENDSELECT.
Thanks,
Sakthi