ABAP Select data from SAP table GBEXP_STRUCT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GBEXP_STRUCT
*  INTO TABLE @DATA(IT_GBEXP_STRUCT2).
*--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_GBEXP_STRUCT INDEX 1 INTO DATA(WA_GBEXP_STRUCT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GBEXP_STRUCT>-BUKRS = 1.
<GBEXP_STRUCT>-BUTXT = 1.
<GBEXP_STRUCT>-WERKS = 1.
<GBEXP_STRUCT>-PBTXT = 1.
<GBEXP_STRUCT>-PERSG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GBEXP_STRUCT-PGTXT, sy-vline,
  WA_GBEXP_STRUCT-PERSK, sy-vline,
  WA_GBEXP_STRUCT-PKTXT, sy-vline,
  WA_GBEXP_STRUCT-GSBER, sy-vline,
  WA_GBEXP_STRUCT-GTEXT, sy-vline,
  WA_GBEXP_STRUCT-BTRTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GBEXP_STRUCT 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_GBEXP_STRUCT 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_GBEXP_STRUCT INTO WA_GBEXP_STRUCT.


*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_GBEXP_STRUCT_STR, 
BUKRS TYPE STRING,
BUTXT TYPE STRING,
WERKS TYPE STRING,
PBTXT TYPE STRING,
PERSG TYPE STRING,
PGTXT TYPE STRING,
PERSK TYPE STRING,
PKTXT TYPE STRING,
GSBER TYPE STRING,
GTEXT TYPE STRING,
BTRTL TYPE STRING,
BTRTX TYPE STRING,
ABKRS TYPE STRING,
ABKTX TYPE STRING,
PERNR TYPE STRING,
NAME TYPE STRING,
TYPE TYPE STRING,
SEVER TYPE STRING,
SRTRO TYPE STRING,
FPPER TYPE STRING,
MCLAS TYPE STRING,
MSGNO TYPE STRING,
MESSG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GBEXP_STRUCT_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_GBEXP_STRUCT_STR-BUKRS sy-vline 
WA_GBEXP_STRUCT_STR-BUTXT sy-vline 
WA_GBEXP_STRUCT_STR-WERKS sy-vline 
WA_GBEXP_STRUCT_STR-PBTXT sy-vline 
WA_GBEXP_STRUCT_STR-PERSG sy-vline 
WA_GBEXP_STRUCT_STR-PGTXT sy-vline 
WA_GBEXP_STRUCT_STR-PERSK sy-vline 
WA_GBEXP_STRUCT_STR-PKTXT sy-vline 
WA_GBEXP_STRUCT_STR-GSBER sy-vline 
WA_GBEXP_STRUCT_STR-GTEXT sy-vline 
WA_GBEXP_STRUCT_STR-BTRTL sy-vline 
WA_GBEXP_STRUCT_STR-BTRTX sy-vline 
WA_GBEXP_STRUCT_STR-ABKRS sy-vline 
WA_GBEXP_STRUCT_STR-ABKTX sy-vline 
WA_GBEXP_STRUCT_STR-PERNR sy-vline 
WA_GBEXP_STRUCT_STR-NAME sy-vline 
WA_GBEXP_STRUCT_STR-TYPE sy-vline 
WA_GBEXP_STRUCT_STR-SEVER sy-vline 
WA_GBEXP_STRUCT_STR-SRTRO sy-vline 
WA_GBEXP_STRUCT_STR-FPPER sy-vline 
WA_GBEXP_STRUCT_STR-MCLAS sy-vline 
WA_GBEXP_STRUCT_STR-MSGNO sy-vline 
WA_GBEXP_STRUCT_STR-MESSG sy-vline      INTO ld_text SEPARATED BY SPACE.

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