ABAP Select data from SAP table MC02M_1HDR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MC02M_1HDR 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_1HDR. 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_1HDR 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_1HDR TYPE STANDARD TABLE OF MC02M_1HDR,
      WA_MC02M_1HDR TYPE MC02M_1HDR,
      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_1HDR> TYPE MC02M_1HDR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_MC02M_1HDR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM MC02M_1HDR
  INTO TABLE IT_MC02M_1HDR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MC02M_1HDR
*  INTO TABLE @DATA(IT_MC02M_1HDR2).
*--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_1HDR INDEX 1 INTO DATA(WA_MC02M_1HDR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_MC02M_1HDR ASSIGNING <MC02M_1HDR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MC02M_1HDR>-ALIEF = 1.
<MC02M_1HDR>-ARECH = 1.
<MC02M_1HDR>-BEDAT = 1.
<MC02M_1HDR>-BSART = 1.
<MC02M_1HDR>-BSTYP = 1.

ENDLOOP.

LOOP AT IT_MC02M_1HDR INTO WA_MC02M_1HDR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MC02M_1HDR-BUDAT, sy-vline,
  WA_MC02M_1HDR-EBELN, sy-vline,
  WA_MC02M_1HDR-EKGRP, sy-vline,
  WA_MC02M_1HDR-EKORG, sy-vline,
  WA_MC02M_1HDR-KDATB, sy-vline,
  WA_MC02M_1HDR-KDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MC02M_1HDR 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_1HDR 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_1HDR INTO WA_MC02M_1HDR.


*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 EBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_1HDR-EBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_1HDR-EBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LBLIF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_1HDR-LBLIF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_1HDR-LBLIF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_1HDR-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_1HDR-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFRE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_1HDR-LIFRE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_1HDR-LIFRE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LLIEF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_1HDR-LLIEF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_1HDR-LLIEF.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_1HDR-LOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_1HDR-LOGSY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ORGLOGSY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_1HDR-ORGLOGSY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_1HDR-ORGLOGSY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EXCRT, internal->external for field WKURS
CALL FUNCTION 'CONVERSION_EXIT_EXCRT_OUTPUT'
  EXPORTING
    input =                      WA_MC02M_1HDR-WKURS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MC02M_1HDR-WKURS.
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_1HDR_STR, 
ALIEF TYPE STRING,
ARECH TYPE STRING,
BEDAT TYPE STRING,
BSART TYPE STRING,
BSTYP TYPE STRING,
BUDAT TYPE STRING,
EBELN TYPE STRING,
EKGRP TYPE STRING,
EKORG TYPE STRING,
KDATB TYPE STRING,
KDATE TYPE STRING,
LBLIF TYPE STRING,
LIFNR TYPE STRING,
LIFRE TYPE STRING,
LLIEF TYPE STRING,
LOGSY TYPE STRING,
ORGLOGSY TYPE STRING,
RESWK TYPE STRING,
STATU TYPE STRING,
SYDAT TYPE STRING,
WAERS TYPE STRING,
WKURS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MC02M_1HDR_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_1HDR_STR-ALIEF sy-vline 
WA_MC02M_1HDR_STR-ARECH sy-vline 
WA_MC02M_1HDR_STR-BEDAT sy-vline 
WA_MC02M_1HDR_STR-BSART sy-vline 
WA_MC02M_1HDR_STR-BSTYP sy-vline 
WA_MC02M_1HDR_STR-BUDAT sy-vline 
WA_MC02M_1HDR_STR-EBELN sy-vline 
WA_MC02M_1HDR_STR-EKGRP sy-vline 
WA_MC02M_1HDR_STR-EKORG sy-vline 
WA_MC02M_1HDR_STR-KDATB sy-vline 
WA_MC02M_1HDR_STR-KDATE sy-vline 
WA_MC02M_1HDR_STR-LBLIF sy-vline 
WA_MC02M_1HDR_STR-LIFNR sy-vline 
WA_MC02M_1HDR_STR-LIFRE sy-vline 
WA_MC02M_1HDR_STR-LLIEF sy-vline 
WA_MC02M_1HDR_STR-LOGSY sy-vline 
WA_MC02M_1HDR_STR-ORGLOGSY sy-vline 
WA_MC02M_1HDR_STR-RESWK sy-vline 
WA_MC02M_1HDR_STR-STATU sy-vline 
WA_MC02M_1HDR_STR-SYDAT sy-vline 
WA_MC02M_1HDR_STR-WAERS sy-vline 
WA_MC02M_1HDR_STR-WKURS sy-vline      INTO ld_text SEPARATED BY SPACE.

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