ABAP Select data from SAP table ACMM_GL_COMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ACMM_GL_COMP
*  INTO TABLE @DATA(IT_ACMM_GL_COMP2).
*--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_ACMM_GL_COMP INDEX 1 INTO DATA(WA_ACMM_GL_COMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ACMM_GL_COMP>-BLART = 1.
<ACMM_GL_COMP>-BLDAT = 1.
<ACMM_GL_COMP>-BKTXT = 1.
<ACMM_GL_COMP>-BUDAT = 1.
<ACMM_GL_COMP>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ACMM_GL_COMP-GJAHR, sy-vline,
  WA_ACMM_GL_COMP-GLVOR, sy-vline,
  WA_ACMM_GL_COMP-KURSF, sy-vline,
  WA_ACMM_GL_COMP-MWSKZ, sy-vline,
  WA_ACMM_GL_COMP-WAERS, sy-vline,
  WA_ACMM_GL_COMP-MONAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ACMM_GL_COMP 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_ACMM_GL_COMP 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_ACMM_GL_COMP INTO WA_ACMM_GL_COMP.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ACMM_GL_COMP-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACMM_GL_COMP-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field KURSF
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_ACMM_GL_COMP-KURSF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACMM_GL_COMP-KURSF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRX, internal->external for field KURSX
CALL FUNCTION 'CONVERSION_EXIT_EXCRX_OUTPUT'
  EXPORTING
    input =                      WA_ACMM_GL_COMP-KURSX
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ACMM_GL_COMP-KURSX.
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_ACMM_GL_COMP_STR, 
BLART TYPE STRING,
BLDAT TYPE STRING,
BKTXT TYPE STRING,
BUDAT TYPE STRING,
BUKRS TYPE STRING,
GJAHR TYPE STRING,
GLVOR TYPE STRING,
KURSF TYPE STRING,
MWSKZ TYPE STRING,
WAERS TYPE STRING,
MONAT TYPE STRING,
XRECH TYPE STRING,
HSWAE TYPE STRING,
WWERT TYPE STRING,
SCVTEXT TYPE STRING,
SCVARIANT TYPE STRING,
RBSTAT TYPE STRING,
LSTML TYPE STRING,
XBLNR TYPE STRING,
KURSX TYPE STRING,
TAX_COUNTRY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ACMM_GL_COMP_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_ACMM_GL_COMP_STR-BLART sy-vline 
WA_ACMM_GL_COMP_STR-BLDAT sy-vline 
WA_ACMM_GL_COMP_STR-BKTXT sy-vline 
WA_ACMM_GL_COMP_STR-BUDAT sy-vline 
WA_ACMM_GL_COMP_STR-BUKRS sy-vline 
WA_ACMM_GL_COMP_STR-GJAHR sy-vline 
WA_ACMM_GL_COMP_STR-GLVOR sy-vline 
WA_ACMM_GL_COMP_STR-KURSF sy-vline 
WA_ACMM_GL_COMP_STR-MWSKZ sy-vline 
WA_ACMM_GL_COMP_STR-WAERS sy-vline 
WA_ACMM_GL_COMP_STR-MONAT sy-vline 
WA_ACMM_GL_COMP_STR-XRECH sy-vline 
WA_ACMM_GL_COMP_STR-HSWAE sy-vline 
WA_ACMM_GL_COMP_STR-WWERT sy-vline 
WA_ACMM_GL_COMP_STR-SCVTEXT sy-vline 
WA_ACMM_GL_COMP_STR-SCVARIANT sy-vline 
WA_ACMM_GL_COMP_STR-RBSTAT sy-vline 
WA_ACMM_GL_COMP_STR-LSTML sy-vline 
WA_ACMM_GL_COMP_STR-XBLNR sy-vline 
WA_ACMM_GL_COMP_STR-KURSX sy-vline 
WA_ACMM_GL_COMP_STR-TAX_COUNTRY sy-vline      INTO ld_text SEPARATED BY SPACE.

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