topic Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation in Application Development and Automation Discussions

ABAP 7.4 - multiple FOR Vs Nested Loop operation

KumarAakash — Wed, 10 Nov 2021 19:42:06 GMT

DATA : it_review TYPE STANDARD TABLE OF z_review,<br>       it_roles TYPE STANDARD TABLE OF z_roles,<br>       it_count TYPE STANDARD TABLE OF z_count.<br><br>select * FROM z_review INTO TABLE it_review.      "--> count =     22477 Rows<br>  select * FROM z_roles INTO TABLE it_roles.       "---> count  =  858035 ROws <br>    select * FROM z_count   INTO TABLE it_count.    "---->count  =  187458 Rows <br><br>*<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<br>data(gt_final) = VALUE lt_final( for lt_review in it_review<br>                          for ls_roles IN it_roles FROM line_index( it_roles[ AGR_NAME = lt_review-AGR_NAME  ] )<br>                          where ( AGR_NAME = lt_review-AGR_NAME )<br>                          for ls_count in it_count FROM line_index( it_count[ uname = lt_review-uname ] )<br>                          WHERE ( uname = lt_review-uname and tcode = ls_roles-tcode )<br>                          LET ls_final = VALUE ty_final(<br>                            uname = lt_review-uname<br>                           AGR_NAME = lt_review-AGR_NAME<br>                            tcode = ls_roles-tcode<br>                            count = ls_count-zcount )<br>                       IN ( CORRESPONDING #( BASE ( ls_final ) lt_review ) ) ).<br><br><br>   LOOP AT it_review INTO DATA(wa_review).<br>**         check if user and tcode has count..<br>      LOOP AT it_roles INTO DATA(wa_roles) WHERE agr_name = wa_review-agr_name.<br>         TRY .<br>           data(wa_count) = it_count[ UNAME = wa_review-uname TCODE = wa_roles-tcode  ].<br>         CATCH cx_sy_itab_line_not_found..<br>           CONTINUE.<br>         ENDTRY.<br>         write :/10  wa_review-uname  ,20  wa_review-agr_name , 60 wa_roles-tcode , 75 wa_count-zcount.<br>         exit.<br>        endloop.<br>       ENDLOOP.<br>

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I need help / suggestion i m trying my hands on 7.4 syntax on SQL 'FOR " multiple joins and trying to check if i replace the nested looped operation , but my Nested FOR never gave the result where as nested Loop did gave output..

can you all help me figure out , where I going completely wrong...

Ask here is - if my FOR nested is wrong or right , how can design it such that it behaves as nested looped and i get final table appended with desired fields .. as i done in the above loop statments.

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

matt — Wed, 10 Nov 2021 20:24:57 GMT

Edit your question and this time click on the "code" button in the question editor, and enter the code into a code box so that it's readable.

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

KumarAakash — Wed, 10 Nov 2021 20:56:22 GMT

thanks Mathew !! did exactly as asked .

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

Sandra_Rossi — Wed, 10 Nov 2021 20:56:49 GMT

I think it's a better practice to explain the problem before the code.

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

Sandra_Rossi — Wed, 10 Nov 2021 21:04:19 GMT

Your "for" loops look completely different from the second block, I don't understand what you want to achieve.

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

KumarAakash — Wed, 10 Nov 2021 21:04:32 GMT

sandra.rossi - i did mention in the above question , let me know if i need to add more details .. happy to help !!

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

Sandra_Rossi — Thu, 11 Nov 2021 07:03:48 GMT

I don't understand how you came to have a so complex expression. Why not simplifying it:

data(gt_final) = VALUE lt_final( 
    for wa_review in it_review
    for wa_roles IN it_roles
    where ( AGR_NAME = wa_review-AGR_NAME )
    ( uname    = wa_review-uname
      agr_name = wa_review-agr_name
      tcode    = wa_roles-tcode
      count    = VALUE #( it_count[ UNAME = wa_review-uname TCODE = wa_roles-tcode ] OPTIONAL ) ) ).

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

KumarAakash — Thu, 11 Nov 2021 14:42:50 GMT

Thanks sandra.rossi for the code , I need some more help if you can suggest would be great.

in above code you have mentioned 2 FOR statement together with where single clause , does that mean if both are met then only record gets inserted in the GT_FINAL...

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

Sandra_Rossi — Thu, 11 Nov 2021 15:56:16 GMT

Yes. Not different from your 2 LOOP AT.

   LOOP AT it_review INTO DATA(wa_review).
     LOOP AT it_roles INTO DATA(wa_roles) WHERE agr_name = wa_review-agr_name.

Re: ABAP 7.4 - multiple FOR Vs Nested Loop operation

KumarAakash — Fri, 12 Nov 2021 02:01:21 GMT

Thanks @sandra rossi - for your help , I will mark it as close ...