ABAP Select data from SAP table PBGS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PBGS
*  INTO TABLE @DATA(IT_PBGS2).
*--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_PBGS INDEX 1 INTO DATA(WA_PBGS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PBGS>-DELKZ = 1.
<PBGS>-PDATU = 1.
<PBGS>-DAT00 = 1.
<PBGS>-ENTLU = 1.
<PBGS>-MNG01 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PBGS-MNG02, sy-vline,
  WA_PBGS-MNG03, sy-vline,
  WA_PBGS-MNG04, sy-vline,
  WA_PBGS-KDAUF, sy-vline,
  WA_PBGS-KDPOS, sy-vline,
  WA_PBGS-RSNUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PBGS 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_PBGS 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_PBGS INTO WA_PBGS.


*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 KDAUF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PBGS-KDAUF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PBGS-KDAUF.
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_PBGS_STR, 
DELKZ TYPE STRING,
PDATU TYPE STRING,
DAT00 TYPE STRING,
ENTLU TYPE STRING,
MNG01 TYPE STRING,
MNG02 TYPE STRING,
MNG03 TYPE STRING,
MNG04 TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
RSNUM TYPE STRING,
RSPOS TYPE STRING,
ALINE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PBGS_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_PBGS_STR-DELKZ sy-vline 
WA_PBGS_STR-PDATU sy-vline 
WA_PBGS_STR-DAT00 sy-vline 
WA_PBGS_STR-ENTLU sy-vline 
WA_PBGS_STR-MNG01 sy-vline 
WA_PBGS_STR-MNG02 sy-vline 
WA_PBGS_STR-MNG03 sy-vline 
WA_PBGS_STR-MNG04 sy-vline 
WA_PBGS_STR-KDAUF sy-vline 
WA_PBGS_STR-KDPOS sy-vline 
WA_PBGS_STR-RSNUM sy-vline 
WA_PBGS_STR-RSPOS sy-vline 
WA_PBGS_STR-ALINE sy-vline      INTO ld_text SEPARATED BY SPACE.

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