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Author's profile photo Joachim Rees

ABAP restrictions: keep it to 72 characters – really?

Once upon a time, long ago there where certain restrictions.
Like: Ram was precious. Disc space was scarce.
This led to some “best practices” or rules that probably still stick with people (maybe not even knowing the history), although they don’t make sense anymore.

One example is not using “speaking” naming, but encoding meaning into short, arbitrary codes. “Order Creation” is V45 (SPMV45A), “Delivery Creation” is V50 (SAPMV50A).
Makes sense to you? Well congratulation, then you are in the business from some time already, nice.

Anyways, I though the rule “a line of coding may not be more than 72 characters!” would be one of this arcane, neglectable rules.
Surely this doesn’t matter in a modern (say S/4HANA 1909, FPS2) SAP-system, right?!

Well, you guessed it – it does still matter! There are cases, that do hurt quite much (as in: dump!) if you use a character to much.

Wanna try it out?! Here’s my example:

I your sandbox got to RM07IMAT, put in a line with more than 72 characters.

MI22, F8, ctrl+shift+F12-> dump:

 

See?

There are quit some SAP Notes for READ_REPORT_LINE_TOO_LONG – at least the ones I checke don’t solve that problem by just allowing more that 72 chars already.
They all alter the code to keep to this restriction.

So: how long are your ABAP code lines?

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      14 Comments
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      Author's profile photo Manfred Klein
      Manfred Klein

      As a JAVA programmer I have two words for you: HAAA HA! 😉

      Author's profile photo Jane Tracy
      Jane Tracy

      That’s just cruel=)

       

      Author's profile photo Manfred Klein
      Manfred Klein

      C’mon it’s just gallows humor. Every programming language has it’s strengths and weaknesses.

      Edit: ...and legacy burdens.

      Author's profile photo Sandra Rossi
      Sandra Rossi

      Do you have a sadistic and masoschist personality to read ABAP blog posts then? ?

      Hopefully, any ABAP program developed since 2001 (ABAP 6.10) doesn’t have to be limited to 72 characters anymore. Only legacy programs eventually suffer this limit.

      Author's profile photo Joachim Rees
      Joachim Rees
      Blog Post Author

      Actually I think any report - old or new - will suffer from that if it is put into FM K_KKB_FIELDCAT_MERGE (Like it happens in e.g. MI22 ).

        data:
              l_abap_source like rssource occurs 0 with header line.
      [...]
          read report l_prog_tab_local into l_abap_source.

      So anything more the 72 char, this will give the mentioned dump. 🙁

      DDIC-Structure RSSOURCE consist of Data-Element EDPLINE, Domain EDPLINE, and that's a CHAR 72. -> How about a filed length-extension here? That would be nice!

      Author's profile photo Sandra Rossi
      Sandra Rossi

      "Only legacy" doesn't mean that there are "few". But only those which call K_KKB_FIELDCAT_MERGE (and all derived FMs like REUSE_ALV_FIELDCATALOG_MERGE) with the parameter I_STRUCNAME are concerned. It's far from meaning all the calls to this FM. Hopefully, there is no reason to call this FM anymore since 6.10 as the field catalog is automatically calculated with CL_SALV_TABLE.

      Author's profile photo Matthew Billingham
      Matthew Billingham

      As a JAVA and ABAP programmer, my answer remains at - about 100 chars. Beyond that and it can interfere with readability.

      Author's profile photo Shai Sinai
      Shai Sinai

      The real question here should be why are you using FM K_KKB_FIELDCAT_MERGE?

      Author's profile photo Joachim Rees
      Joachim Rees
      Blog Post Author

      Yes, I agree!

      And the answer is: I'm not using it at all, but SAP is! (in RM07IMAT = MI22).

      Author's profile photo Shai Sinai
      Shai Sinai

      OMG (They killed the ABAP report. You bastards).

      Doesn't note 2260803 - "MI22: Runtime error READ_REPORT_LINE_TOO_LONG" fix this issue?

       

      And it it seems you're a little too overwhelmed. I have seen much worse SAP-standard ABAP code in my life 🙂

      Author's profile photo Joachim Rees
      Joachim Rees
      Blog Post Author

      With that note, they “fix” it as in braking their lines down to < 72 c:

      [SAP ONE Launchpad showing ABAP Correction of note 2260803]

      SAP%20ONE%20Launchpad%20showing%20ABAP%20Correction%20of%20note%202260803

      SAP ONE Launchpad showing ABAP Correction of note 2260803

      They don’t fix it as in: not using FM K_KKB_FIELDCAT_MERGE anymore (or better yet, giving a few more characters to DDIC RSSOURCE / EDPLINE ).

      True, there is lots of bad SAP code.
      Usually I don’t care that much – I’m ranting more when it hurts me in my work ;-p

      Best
      Joachim

      Author's profile photo Joachim Rees
      Joachim Rees
      Blog Post Author

      Image for above post;

      Author's profile photo Joachim Rees
      Joachim Rees
      Blog Post Author

      Sorry that I comment-spam my own blog! 😉
      context: https://answers.sap.com/questions/13092199/bug-image-upload-blog-comment-doesnt-work.html

       

      Original Name:

       

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      Author's profile photo Matthew Billingham
      Matthew Billingham

      There's another one I hit with a SUBMIT from a BADI. But I forget the details.