ABAP Select data from SAP table REXC_NL_AJCHARACT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REXC_NL_AJCHARACT 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 REXC_NL_AJCHARACT. 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 REXC_NL_AJCHARACT 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_REXC_NL_AJCHARACT TYPE STANDARD TABLE OF REXC_NL_AJCHARACT,
      WA_REXC_NL_AJCHARACT TYPE REXC_NL_AJCHARACT,
      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: <REXC_NL_AJCHARACT> TYPE REXC_NL_AJCHARACT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXC_NL_AJCHARACT
*  INTO TABLE @DATA(IT_REXC_NL_AJCHARACT2).
*--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_REXC_NL_AJCHARACT INDEX 1 INTO DATA(WA_REXC_NL_AJCHARACT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXC_NL_AJCHARACT>-MANDT = 1.
<REXC_NL_AJCHARACT>-INTRENO = 1.
<REXC_NL_AJCHARACT>-FIXFITCHARACT = 1.
<REXC_NL_AJCHARACT>-VALIDTO = 1.
<REXC_NL_AJCHARACT>-VALIDFROM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXC_NL_AJCHARACT-FACTNOOFFIXFIT, sy-vline,
  WA_REXC_NL_AJCHARACT-FACTNOOFRO, sy-vline,
  WA_REXC_NL_AJCHARACT-FACTQUOTENUM, sy-vline,
  WA_REXC_NL_AJCHARACT-FACTQUOTEDENOM, sy-vline,
  WA_REXC_NL_AJCHARACT-FACTQUOTERD, sy-vline,
  WA_REXC_NL_AJCHARACT-NBOFPOINTSRD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXC_NL_AJCHARACT 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_REXC_NL_AJCHARACT 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_REXC_NL_AJCHARACT INTO WA_REXC_NL_AJCHARACT.


*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 FIXFITCHARACT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXC_NL_AJCHARACT-FIXFITCHARACT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_NL_AJCHARACT-FIXFITCHARACT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_REXC_NL_AJCHARACT-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXC_NL_AJCHARACT-VALIDTO.
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_REXC_NL_AJCHARACT_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
FIXFITCHARACT TYPE STRING,
VALIDTO TYPE STRING,
VALIDFROM TYPE STRING,
FACTNOOFFIXFIT TYPE STRING,
FACTNOOFRO TYPE STRING,
FACTQUOTENUM TYPE STRING,
FACTQUOTEDENOM TYPE STRING,
FACTQUOTERD TYPE STRING,
NBOFPOINTSRD TYPE STRING,
XFACTOR TYPE STRING,
CALCNBOFPOINTSRD TYPE STRING,
WEIGHT TYPE STRING,
OVERWRITEFROMMIN TYPE STRING,
OVERWRITEFROMMAX TYPE STRING,
FFCTACCURATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXC_NL_AJCHARACT_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_REXC_NL_AJCHARACT_STR-MANDT sy-vline 
WA_REXC_NL_AJCHARACT_STR-INTRENO sy-vline 
WA_REXC_NL_AJCHARACT_STR-FIXFITCHARACT sy-vline 
WA_REXC_NL_AJCHARACT_STR-VALIDTO sy-vline 
WA_REXC_NL_AJCHARACT_STR-VALIDFROM sy-vline 
WA_REXC_NL_AJCHARACT_STR-FACTNOOFFIXFIT sy-vline 
WA_REXC_NL_AJCHARACT_STR-FACTNOOFRO sy-vline 
WA_REXC_NL_AJCHARACT_STR-FACTQUOTENUM sy-vline 
WA_REXC_NL_AJCHARACT_STR-FACTQUOTEDENOM sy-vline 
WA_REXC_NL_AJCHARACT_STR-FACTQUOTERD sy-vline 
WA_REXC_NL_AJCHARACT_STR-NBOFPOINTSRD sy-vline 
WA_REXC_NL_AJCHARACT_STR-XFACTOR sy-vline 
WA_REXC_NL_AJCHARACT_STR-CALCNBOFPOINTSRD sy-vline 
WA_REXC_NL_AJCHARACT_STR-WEIGHT sy-vline 
WA_REXC_NL_AJCHARACT_STR-OVERWRITEFROMMIN sy-vline 
WA_REXC_NL_AJCHARACT_STR-OVERWRITEFROMMAX sy-vline 
WA_REXC_NL_AJCHARACT_STR-FFCTACCURATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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