ABAP Select data from SAP table ACCCH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACCCH
*  INTO TABLE @DATA(IT_ACCCH2).
*--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_ACCCH INDEX 1 INTO DATA(WA_ACCCH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACCCH>-MANDT = 1.
<ACCCH>-AWTYP = 1.
<ACCCH>-AWREF = 1.
<ACCCH>-AWORG = 1.
<ACCCH>-AWSYS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACCCH-OBZEI, sy-vline,
  WA_ACCCH-LIFNR, sy-vline,
  WA_ACCCH-KUNNR, sy-vline,
  WA_ACCCH-MANSP, sy-vline,
  WA_ACCCH-ZLSPR, sy-vline,
  WA_ACCCH-ZFBDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACCCH 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_ACCCH 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_ACCCH INTO WA_ACCCH.


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

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

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

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ACCCH-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACCCH-KUNNR.
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_ACCCH_STR, 
MANDT TYPE STRING,
AWTYP TYPE STRING,
AWREF TYPE STRING,
AWORG TYPE STRING,
AWSYS TYPE STRING,
OBZEI TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
MANSP TYPE STRING,
ZLSPR TYPE STRING,
ZFBDT TYPE STRING,
XBLNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACCCH_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_ACCCH_STR-MANDT sy-vline 
WA_ACCCH_STR-AWTYP sy-vline 
WA_ACCCH_STR-AWREF sy-vline 
WA_ACCCH_STR-AWORG sy-vline 
WA_ACCCH_STR-AWSYS sy-vline 
WA_ACCCH_STR-OBZEI sy-vline 
WA_ACCCH_STR-LIFNR sy-vline 
WA_ACCCH_STR-KUNNR sy-vline 
WA_ACCCH_STR-MANSP sy-vline 
WA_ACCCH_STR-ZLSPR sy-vline 
WA_ACCCH_STR-ZFBDT sy-vline 
WA_ACCCH_STR-XBLNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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