ABAP Select data from SAP table T71G0 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T71G0 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 T71G0. 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 T71G0 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_T71G0 TYPE STANDARD TABLE OF T71G0,
      WA_T71G0 TYPE T71G0,
      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: <T71G0> TYPE T71G0.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T71G0.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T71G0
  INTO TABLE IT_T71G0.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T71G0
*  INTO TABLE @DATA(IT_T71G02).
*--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_T71G0 INDEX 1 INTO DATA(WA_T71G02).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T71G0 ASSIGNING <T71G0>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T71G0>-MANDT = 1.
<T71G0>-CAREA = 1.
<T71G0>-MATRIX = 1.
<T71G0>-ENDDA = 1.
<T71G0>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_T71G0 INTO WA_T71G0.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T71G0-D1IND, sy-vline,
  WA_T71G0-DIMS1, sy-vline,
  WA_T71G0-D2IND, sy-vline,
  WA_T71G0-DIMS2, sy-vline,
  WA_T71G0-D3IND, sy-vline,
  WA_T71G0-DIMS3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T71G0 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_T71G0 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_T71G0 INTO WA_T71G0.


*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_T71G0_STR, 
MANDT TYPE STRING,
CAREA TYPE STRING,
MATRIX TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
D1IND TYPE STRING,
DIMS1 TYPE STRING,
D2IND TYPE STRING,
DIMS2 TYPE STRING,
D3IND TYPE STRING,
DIMS3 TYPE STRING,
VTYPE TYPE STRING,
CURCY TYPE STRING,
UNIT TYPE STRING,
DAMTI TYPE STRING,
LAMTI TYPE STRING,
HAMTI TYPE STRING,
EAMTI TYPE STRING,
DPRCI TYPE STRING,
LPRCI TYPE STRING,
HPRCI TYPE STRING,
EPRCI TYPE STRING,
DNUMI TYPE STRING,
LNUMI TYPE STRING,
HNUMI TYPE STRING,
ENUMI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T71G0_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_T71G0_STR-MANDT sy-vline 
WA_T71G0_STR-CAREA sy-vline 
WA_T71G0_STR-MATRIX sy-vline 
WA_T71G0_STR-ENDDA sy-vline 
WA_T71G0_STR-BEGDA sy-vline 
WA_T71G0_STR-D1IND sy-vline 
WA_T71G0_STR-DIMS1 sy-vline 
WA_T71G0_STR-D2IND sy-vline 
WA_T71G0_STR-DIMS2 sy-vline 
WA_T71G0_STR-D3IND sy-vline 
WA_T71G0_STR-DIMS3 sy-vline 
WA_T71G0_STR-VTYPE sy-vline 
WA_T71G0_STR-CURCY sy-vline 
WA_T71G0_STR-UNIT sy-vline 
WA_T71G0_STR-DAMTI sy-vline 
WA_T71G0_STR-LAMTI sy-vline 
WA_T71G0_STR-HAMTI sy-vline 
WA_T71G0_STR-EAMTI sy-vline 
WA_T71G0_STR-DPRCI sy-vline 
WA_T71G0_STR-LPRCI sy-vline 
WA_T71G0_STR-HPRCI sy-vline 
WA_T71G0_STR-EPRCI sy-vline 
WA_T71G0_STR-DNUMI sy-vline 
WA_T71G0_STR-LNUMI sy-vline 
WA_T71G0_STR-HNUMI sy-vline 
WA_T71G0_STR-ENUMI sy-vline      INTO ld_text SEPARATED BY SPACE.

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