ABAP Select data from SAP table T082G into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T082G 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 T082G. 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 T082G 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_T082G TYPE STANDARD TABLE OF T082G,
      WA_T082G TYPE T082G,
      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: <T082G> TYPE T082G.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T082G.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T082G
  INTO TABLE IT_T082G.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T082G
*  INTO TABLE @DATA(IT_T082G2).
*--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_T082G INDEX 1 INTO DATA(WA_T082G2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T082G ASSIGNING <T082G>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T082G>-MANDT = 1.
<T082G>-FEGTB = 1.
<T082G>-FELEI = 1.
<T082G>-FEGRU = 1.
<T082G>-FMUSS = 1.

ENDLOOP.

LOOP AT IT_T082G INTO WA_T082G.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T082G-FKANN, sy-vline,
  WA_T082G-FNEIN, sy-vline,
  WA_T082G-INANK, sy-vline,
  WA_T082G-INGEG, sy-vline,
  WA_T082G-IANL1, sy-vline,
  WA_T082G-IANL2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T082G 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_T082G 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_T082G INTO WA_T082G.


*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_T082G_STR, 
MANDT TYPE STRING,
FEGTB TYPE STRING,
FELEI TYPE STRING,
FEGRU TYPE STRING,
FMUSS TYPE STRING,
FKANN TYPE STRING,
FNEIN TYPE STRING,
INANK TYPE STRING,
INGEG TYPE STRING,
IANL1 TYPE STRING,
IANL2 TYPE STRING,
ICPYR TYPE STRING,
IMASS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T082G_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_T082G_STR-MANDT sy-vline 
WA_T082G_STR-FEGTB sy-vline 
WA_T082G_STR-FELEI sy-vline 
WA_T082G_STR-FEGRU sy-vline 
WA_T082G_STR-FMUSS sy-vline 
WA_T082G_STR-FKANN sy-vline 
WA_T082G_STR-FNEIN sy-vline 
WA_T082G_STR-INANK sy-vline 
WA_T082G_STR-INGEG sy-vline 
WA_T082G_STR-IANL1 sy-vline 
WA_T082G_STR-IANL2 sy-vline 
WA_T082G_STR-ICPYR sy-vline 
WA_T082G_STR-IMASS sy-vline      INTO ld_text SEPARATED BY SPACE.

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