ABAP Select data from SAP table T71ADM23 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T71ADM23 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 T71ADM23. 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 T71ADM23 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_T71ADM23 TYPE STANDARD TABLE OF T71ADM23,
      WA_T71ADM23 TYPE T71ADM23,
      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: <T71ADM23> TYPE T71ADM23.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T71ADM23.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T71ADM23
  INTO TABLE IT_T71ADM23.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T71ADM23
*  INTO TABLE @DATA(IT_T71ADM232).
*--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_T71ADM23 INDEX 1 INTO DATA(WA_T71ADM232).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T71ADM23 ASSIGNING <T71ADM23>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T71ADM23>-MANDT = 1.
<T71ADM23>-CAREA = 1.
<T71ADM23>-MATRX = 1.
<T71ADM23>-SEGM1 = 1.
<T71ADM23>-SEGM2 = 1.

ENDLOOP.

LOOP AT IT_T71ADM23 INTO WA_T71ADM23.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T71ADM23-SEGM3, sy-vline,
  WA_T71ADM23-ENDDA, sy-vline,
  WA_T71ADM23-BEGDA, sy-vline,
  WA_T71ADM23-DFAMT, sy-vline,
  WA_T71ADM23-MIAMT, sy-vline,
  WA_T71ADM23-MAAMT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T71ADM23 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_T71ADM23 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_T71ADM23 INTO WA_T71ADM23.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_T71ADM23_STR, 
MANDT TYPE STRING,
CAREA TYPE STRING,
MATRX TYPE STRING,
SEGM1 TYPE STRING,
SEGM2 TYPE STRING,
SEGM3 TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
DFAMT TYPE STRING,
MIAMT TYPE STRING,
MAAMT TYPE STRING,
DFPCT TYPE STRING,
MIPCT TYPE STRING,
MAPCT TYPE STRING,
DFNUM TYPE STRING,
MINUM TYPE STRING,
MANUM TYPE STRING,
CURRE TYPE STRING,
STKUN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T71ADM23_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_T71ADM23_STR-MANDT sy-vline 
WA_T71ADM23_STR-CAREA sy-vline 
WA_T71ADM23_STR-MATRX sy-vline 
WA_T71ADM23_STR-SEGM1 sy-vline 
WA_T71ADM23_STR-SEGM2 sy-vline 
WA_T71ADM23_STR-SEGM3 sy-vline 
WA_T71ADM23_STR-ENDDA sy-vline 
WA_T71ADM23_STR-BEGDA sy-vline 
WA_T71ADM23_STR-DFAMT sy-vline 
WA_T71ADM23_STR-MIAMT sy-vline 
WA_T71ADM23_STR-MAAMT sy-vline 
WA_T71ADM23_STR-DFPCT sy-vline 
WA_T71ADM23_STR-MIPCT sy-vline 
WA_T71ADM23_STR-MAPCT sy-vline 
WA_T71ADM23_STR-DFNUM sy-vline 
WA_T71ADM23_STR-MINUM sy-vline 
WA_T71ADM23_STR-MANUM sy-vline 
WA_T71ADM23_STR-CURRE sy-vline 
WA_T71ADM23_STR-STKUN sy-vline      INTO ld_text SEPARATED BY SPACE.

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