Reading internal table with 2 different keys needed

Former Member — Fri, 22 Aug 2008 09:20:52 GMT

Hi,

i have faced same problem , for at least two occasions, and 'm applying a solution, but i'll like to know if there is a better one (for performance reasons, or other ones , memory , etc...)

The problem is that i need to loop an internal table (a large one), searching for some key entries, and for each one , search for all entries in same table with same value in other field (and do some logic for each one ).

The logic i am applying is to copy the internal table, in an auxiliary internal table, and sort the original table with first criteria and the second with the other criteria.

The two tables are standard.

Then i have 2 nested loops , for searching all the entries with some keys , and for each one loop for all related entries with same value in another field (second key). In both cases i read using binary search, and then loop from that index , until key values change.

For example, here is a code extract:

FORM filtra_punteros_exc TABLES pt_pit_pointer STRUCTURE bdcp

DATA: lt_pit_pointer_sort_mat TYPE TABLE OF bdcp,

wa_pit_pointer LIKE LINE OF pt_pit_pointer,

wa_pit_pointer_sort LIKE LINE OF lt_pit_pointer_sort_mat.

...

sort original table

SORT pt_pit_pointer BY cdobjcl tabname fldname.

auxiliary table, sorted by other criteria

lt_pit_pointer_sort_mat[] = pt_pit_pointer[].

SORT lt_pit_pointer_sort_mat BY cdobjid.

loop all keys

LOOP AT pt_point_exc INTO wa_point_exc.

read key

READ TABLE pt_pit_pointer WITH KEY

cdobjcl = wa_point_exc-cdobjcl

tabname = wa_point_exc-tabname

fldname = wa_point_exc-fldname

BINARY SEARCH

TRANSPORTING NO FIELDS.

IF sy-subrc = 0.

l_tabix = sy-tabix.

read all entries with this key

LOOP AT pt_pit_pointer INTO wa_pit_pointer FROM l_tabix.

Leave the loop, if last relevant entry one read

IF wa_pit_pointer-cdobjcl <> wa_point_exc-cdobjcl OR

wa_pit_pointer-tabname <> wa_point_exc-tabname OR

wa_pit_pointer-fldname <> wa_point_exc-fldname.

EXIT.

ENDIF.

for each key, search for all entries with same value in cdobjid

READ TABLE lt_pit_pointer_sort_mat WITH KEY

cdobjid = wa_pit_pointer-cdobjid

BINARY SEARCH

TRANSPORTING NO FIELDS.

IF sy-subrc = 0.

l_tabix2 = sy-tabix.

LOOP AT lt_pit_pointer_sort_mat INTO wa_pit_pointer_sort FROM l_tabix2.

Leave the loop, if last relevant entry one read

IF wa_pit_pointer_sort-cdobjid <> wa_pit_pointer-cdobjid.

EXIT.

ENDIF.

some logic here ...

ENDLOOP.

ENDIF.

ENDLOOP.

ENDIF.

ENDLOOP.

Thanks in advance for your valuable sugestions,

Miquel

Re: Reading internal table with 2 different keys needed

Former Member — Fri, 22 Aug 2008 11:13:07 GMT

Sorry for bad formatting. I try to arrange it:

 
FORM filtra_punteros_exc TABLES pt_pit_pointer STRUCTURE bdcp

DATA: lt_pit_pointer_sort_mat TYPE TABLE OF bdcp,
wa_pit_pointer LIKE LINE OF pt_pit_pointer,
wa_pit_pointer_sort LIKE LINE OF lt_pit_pointer_sort_mat.
...



*sort original table 
SORT pt_pit_pointer BY cdobjcl tabname fldname.

*auxiliary table, sorted by other criteria 
lt_pit_pointer_sort_mat] = pt_pit_pointer[.
SORT lt_pit_pointer_sort_mat BY cdobjid.


*loop all keys 
LOOP AT pt_point_exc INTO wa_point_exc.


*read key 
  READ TABLE pt_pit_pointer WITH KEY
         cdobjcl = wa_point_exc-cdobjcl  
         tabname = wa_point_exc-tabname
         fldname = wa_point_exc-fldname
       BINARY SEARCH
       TRANSPORTING NO FIELDS.

  IF sy-subrc = 0.
     l_tabix = sy-tabix.


*    read all entries with this key 
     LOOP AT pt_pit_pointer INTO wa_pit_pointer FROM l_tabix.


*        Leave the loop, if last relevant entry one read 
        IF wa_pit_pointer-cdobjcl  NE wa_point_exc-cdobjcl OR
            wa_pit_pointer-tabname NE wa_point_exc-tabname OR
            wa_pit_pointer-fldnamem NE wa_point_exc-fldname.
             EXIT.
        ENDIF.



*      for each key, search for all entries with same value in   
*      cdobjid 

       READ TABLE lt_pit_pointer_sort_mat WITH KEY
       cdobjid = wa_pit_pointer-cdobjid
       BINARY SEARCH
       TRANSPORTING NO FIELDS.

       IF sy-subrc = 0.
          l_tabix2 = sy-tabix.

          LOOP AT lt_pit_pointer_sort_mat INTO   wa_pit_pointer_sort FROM l_tabix2.



*            Leave the loop, if last relevant entry one read 
             IF wa_pit_pointer_sort-cdobjid  NE wa_pit_pointer-cdobjid.
                     EXIT.
             ENDIF.


*          some logic here ... 
         ENDLOOP.
     ENDIF. 
  ENDLOOP.
ENDIF.
ENDLOOP.

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Reading internal table with 2 different keys needed

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