ABAP Select data from SAP table E2CABNM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2CABNM table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to E2CABNM. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the E2CABNM table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_E2CABNM TYPE STANDARD TABLE OF E2CABNM,
      WA_E2CABNM TYPE E2CABNM,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <E2CABNM> TYPE E2CABNM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2CABNM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2CABNM
  INTO TABLE IT_E2CABNM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2CABNM
*  INTO TABLE @DATA(IT_E2CABNM2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_E2CABNM INDEX 1 INTO DATA(WA_E2CABNM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2CABNM ASSIGNING <E2CABNM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2CABNM>-MSGFN = 1.
<E2CABNM>-ATNAM = 1.
<E2CABNM>-ATIDN = 1.
<E2CABNM>-ATFOR = 1.
<E2CABNM>-ANZST = 1.

ENDLOOP.

LOOP AT IT_E2CABNM INTO WA_E2CABNM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2CABNM-ANZDZ, sy-vline,
  WA_E2CABNM-ATVOR, sy-vline,
  WA_E2CABNM-ATSCH, sy-vline,
  WA_E2CABNM-ATKLE, sy-vline,
  WA_E2CABNM-ATKON, sy-vline,
  WA_E2CABNM-ATKLA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2CABNM you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_E2CABNM TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_E2CABNM INTO WA_E2CABNM.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit ALPHA, internal->external for field AENNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2CABNM-AENNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2CABNM-AENNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_E2CABNM_STR, 
MSGFN TYPE STRING,
ATNAM TYPE STRING,
ATIDN TYPE STRING,
ATFOR TYPE STRING,
ANZST TYPE STRING,
ANZDZ TYPE STRING,
ATVOR TYPE STRING,
ATSCH TYPE STRING,
ATKLE TYPE STRING,
ATKON TYPE STRING,
ATKLA TYPE STRING,
ATERF TYPE STRING,
ATEIN TYPE STRING,
MSEHI TYPE STRING,
ATDIM TYPE STRING,
ATGLO TYPE STRING,
ATGLA TYPE STRING,
ATINT TYPE STRING,
ATSON TYPE STRING,
ATTAB TYPE STRING,
ATFEL TYPE STRING,
ATWRD TYPE STRING,
ATFOD TYPE STRING,
ATHIE TYPE STRING,
ATDEX TYPE STRING,
ATFGA TYPE STRING,
ATVSC TYPE STRING,
ANAME TYPE STRING,
ADATU TYPE STRING,
VNAME TYPE STRING,
VDATU TYPE STRING,
ATXAC TYPE STRING,
ATMST TYPE STRING,
DATUV TYPE STRING,
AENNR TYPE STRING,
LKENZ TYPE STRING,
ATINP TYPE STRING,
ATVIE TYPE STRING,
ATHKA TYPE STRING,
ATHKO TYPE STRING,
CLASS TYPE STRING,
ATTOL TYPE STRING,
ATZUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2CABNM_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_E2CABNM_STR-MSGFN sy-vline 
WA_E2CABNM_STR-ATNAM sy-vline 
WA_E2CABNM_STR-ATIDN sy-vline 
WA_E2CABNM_STR-ATFOR sy-vline 
WA_E2CABNM_STR-ANZST sy-vline 
WA_E2CABNM_STR-ANZDZ sy-vline 
WA_E2CABNM_STR-ATVOR sy-vline 
WA_E2CABNM_STR-ATSCH sy-vline 
WA_E2CABNM_STR-ATKLE sy-vline 
WA_E2CABNM_STR-ATKON sy-vline 
WA_E2CABNM_STR-ATKLA sy-vline 
WA_E2CABNM_STR-ATERF sy-vline 
WA_E2CABNM_STR-ATEIN sy-vline 
WA_E2CABNM_STR-MSEHI sy-vline 
WA_E2CABNM_STR-ATDIM sy-vline 
WA_E2CABNM_STR-ATGLO sy-vline 
WA_E2CABNM_STR-ATGLA sy-vline 
WA_E2CABNM_STR-ATINT sy-vline 
WA_E2CABNM_STR-ATSON sy-vline 
WA_E2CABNM_STR-ATTAB sy-vline 
WA_E2CABNM_STR-ATFEL sy-vline 
WA_E2CABNM_STR-ATWRD sy-vline 
WA_E2CABNM_STR-ATFOD sy-vline 
WA_E2CABNM_STR-ATHIE sy-vline 
WA_E2CABNM_STR-ATDEX sy-vline 
WA_E2CABNM_STR-ATFGA sy-vline 
WA_E2CABNM_STR-ATVSC sy-vline 
WA_E2CABNM_STR-ANAME sy-vline 
WA_E2CABNM_STR-ADATU sy-vline 
WA_E2CABNM_STR-VNAME sy-vline 
WA_E2CABNM_STR-VDATU sy-vline 
WA_E2CABNM_STR-ATXAC sy-vline 
WA_E2CABNM_STR-ATMST sy-vline 
WA_E2CABNM_STR-DATUV sy-vline 
WA_E2CABNM_STR-AENNR sy-vline 
WA_E2CABNM_STR-LKENZ sy-vline 
WA_E2CABNM_STR-ATINP sy-vline 
WA_E2CABNM_STR-ATVIE sy-vline 
WA_E2CABNM_STR-ATHKA sy-vline 
WA_E2CABNM_STR-ATHKO sy-vline 
WA_E2CABNM_STR-CLASS sy-vline 
WA_E2CABNM_STR-ATTOL sy-vline 
WA_E2CABNM_STR-ATZUS sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.