ABAP Select data from SAP table M_MEBZF into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM M_MEBZF
*  INTO TABLE @DATA(IT_M_MEBZF2).
*--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_M_MEBZF INDEX 1 INTO DATA(WA_M_MEBZF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<M_MEBZF>-MANDT = 1.
<M_MEBZF>-FRBNR = 1.
<M_MEBZF>-LIFNR = 1.
<M_MEBZF>-EBELN = 1.
<M_MEBZF>-EBELP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_M_MEBZF-STUNR, sy-vline,
  WA_M_MEBZF-ZAEHK, sy-vline,
  WA_M_MEBZF-VGABE, sy-vline,
  WA_M_MEBZF-GJAHR, sy-vline,
  WA_M_MEBZF-BELNR, sy-vline,
  WA_M_MEBZF-BUZEI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_M_MEBZF 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_M_MEBZF 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_M_MEBZF INTO WA_M_MEBZF.


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

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

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

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_M_MEBZF-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_MEBZF-BELNR.
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_M_MEBZF_STR, 
MANDT TYPE STRING,
FRBNR TYPE STRING,
LIFNR TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
STUNR TYPE STRING,
ZAEHK TYPE STRING,
VGABE TYPE STRING,
GJAHR TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
ISEOPBLOCKED TYPE STRING,
BSART TYPE STRING,
EKGRP TYPE STRING,
STATU TYPE STRING,
BSTYP TYPE STRING,
EKORG TYPE STRING,
WERKS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_M_MEBZF_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_M_MEBZF_STR-MANDT sy-vline 
WA_M_MEBZF_STR-FRBNR sy-vline 
WA_M_MEBZF_STR-LIFNR sy-vline 
WA_M_MEBZF_STR-EBELN sy-vline 
WA_M_MEBZF_STR-EBELP sy-vline 
WA_M_MEBZF_STR-STUNR sy-vline 
WA_M_MEBZF_STR-ZAEHK sy-vline 
WA_M_MEBZF_STR-VGABE sy-vline 
WA_M_MEBZF_STR-GJAHR sy-vline 
WA_M_MEBZF_STR-BELNR sy-vline 
WA_M_MEBZF_STR-BUZEI sy-vline 
WA_M_MEBZF_STR-ISEOPBLOCKED sy-vline 
WA_M_MEBZF_STR-BSART sy-vline 
WA_M_MEBZF_STR-EKGRP sy-vline 
WA_M_MEBZF_STR-STATU sy-vline 
WA_M_MEBZF_STR-BSTYP sy-vline 
WA_M_MEBZF_STR-EKORG sy-vline 
WA_M_MEBZF_STR-WERKS sy-vline      INTO ld_text SEPARATED BY SPACE.

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