ABAP Select data from SAP table MC02M_3ACC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MC02M_3ACC 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 MC02M_3ACC. 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 MC02M_3ACC 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_MC02M_3ACC TYPE STANDARD TABLE OF MC02M_3ACC,
      WA_MC02M_3ACC TYPE MC02M_3ACC,
      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: <MC02M_3ACC> TYPE MC02M_3ACC.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MC02M_3ACC.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MC02M_3ACC
  INTO TABLE IT_MC02M_3ACC.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MC02M_3ACC
*  INTO TABLE @DATA(IT_MC02M_3ACC2).
*--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_MC02M_3ACC INDEX 1 INTO DATA(WA_MC02M_3ACC2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MC02M_3ACC ASSIGNING <MC02M_3ACC>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MC02M_3ACC>-AEDAT = 1.
<MC02M_3ACC>-ANLN1 = 1.
<MC02M_3ACC>-ANLN2 = 1.
<MC02M_3ACC>-APLZL = 1.
<MC02M_3ACC>-AUFNR = 1.

ENDLOOP.

LOOP AT IT_MC02M_3ACC INTO WA_MC02M_3ACC.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MC02M_3ACC-AUFPL, sy-vline,
  WA_MC02M_3ACC-EFFHW, sy-vline,
  WA_MC02M_3ACC-EFFWR, sy-vline,
  WA_MC02M_3ACC-FIKRS, sy-vline,
  WA_MC02M_3ACC-FIPOS, sy-vline,
  WA_MC02M_3ACC-FISTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MC02M_3ACC 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_MC02M_3ACC 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_MC02M_3ACC INTO WA_MC02M_3ACC.


*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 ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-FIPOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-GRANT_NBR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-KBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-KBLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NPLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-NPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-NPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PS_PSP_PNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-PS_PSP_PNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-PS_PSP_PNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAKTO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-SAKTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-SAKTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_3ACC-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_3ACC-VBELN.
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_MC02M_3ACC_STR, 
AEDAT TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
APLZL TYPE STRING,
AUFNR TYPE STRING,
AUFPL TYPE STRING,
EFFHW TYPE STRING,
EFFWR TYPE STRING,
FIKRS TYPE STRING,
FIPOS TYPE STRING,
FISTL TYPE STRING,
FKBER TYPE STRING,
GEBER TYPE STRING,
GRANT_NBR TYPE STRING,
GSBER TYPE STRING,
KBLNR TYPE STRING,
KBLPOS TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
KSTRG TYPE STRING,
KTOPL TYPE STRING,
MENGE TYPE STRING,
MWSKZ TYPE STRING,
NAVNW TYPE STRING,
NETHW TYPE STRING,
NETWR TYPE STRING,
NPLNR TYPE STRING,
PAOBJNR TYPE STRING,
PRCTR TYPE STRING,
PS_PSP_PNR TYPE STRING,
SAKTO TYPE STRING,
VBELN TYPE STRING,
VBELP TYPE STRING,
VPROZ TYPE STRING,
XBAUF TYPE STRING,
XBKST TYPE STRING,
XBPRO TYPE STRING,
ZEKKN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MC02M_3ACC_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_MC02M_3ACC_STR-AEDAT sy-vline 
WA_MC02M_3ACC_STR-ANLN1 sy-vline 
WA_MC02M_3ACC_STR-ANLN2 sy-vline 
WA_MC02M_3ACC_STR-APLZL sy-vline 
WA_MC02M_3ACC_STR-AUFNR sy-vline 
WA_MC02M_3ACC_STR-AUFPL sy-vline 
WA_MC02M_3ACC_STR-EFFHW sy-vline 
WA_MC02M_3ACC_STR-EFFWR sy-vline 
WA_MC02M_3ACC_STR-FIKRS sy-vline 
WA_MC02M_3ACC_STR-FIPOS sy-vline 
WA_MC02M_3ACC_STR-FISTL sy-vline 
WA_MC02M_3ACC_STR-FKBER sy-vline 
WA_MC02M_3ACC_STR-GEBER sy-vline 
WA_MC02M_3ACC_STR-GRANT_NBR sy-vline 
WA_MC02M_3ACC_STR-GSBER sy-vline 
WA_MC02M_3ACC_STR-KBLNR sy-vline 
WA_MC02M_3ACC_STR-KBLPOS sy-vline 
WA_MC02M_3ACC_STR-KOKRS sy-vline 
WA_MC02M_3ACC_STR-KOSTL sy-vline 
WA_MC02M_3ACC_STR-KSTRG sy-vline 
WA_MC02M_3ACC_STR-KTOPL sy-vline 
WA_MC02M_3ACC_STR-MENGE sy-vline 
WA_MC02M_3ACC_STR-MWSKZ sy-vline 
WA_MC02M_3ACC_STR-NAVNW sy-vline 
WA_MC02M_3ACC_STR-NETHW sy-vline 
WA_MC02M_3ACC_STR-NETWR sy-vline 
WA_MC02M_3ACC_STR-NPLNR sy-vline 
WA_MC02M_3ACC_STR-PAOBJNR sy-vline 
WA_MC02M_3ACC_STR-PRCTR sy-vline 
WA_MC02M_3ACC_STR-PS_PSP_PNR sy-vline 
WA_MC02M_3ACC_STR-SAKTO sy-vline 
WA_MC02M_3ACC_STR-VBELN sy-vline 
WA_MC02M_3ACC_STR-VBELP sy-vline 
WA_MC02M_3ACC_STR-VPROZ sy-vline 
WA_MC02M_3ACC_STR-XBAUF sy-vline 
WA_MC02M_3ACC_STR-XBKST sy-vline 
WA_MC02M_3ACC_STR-XBPRO sy-vline 
WA_MC02M_3ACC_STR-ZEKKN sy-vline      INTO ld_text SEPARATED BY SPACE.

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