ABAP Select data from SAP table DB2QBGB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP DB2QBGB 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 DB2QBGB. 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 DB2QBGB 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_DB2QBGB TYPE STANDARD TABLE OF DB2QBGB,
      WA_DB2QBGB TYPE DB2QBGB,
      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: <DB2QBGB> TYPE DB2QBGB.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_DB2QBGB.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM DB2QBGB
  INTO TABLE IT_DB2QBGB.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DB2QBGB
*  INTO TABLE @DATA(IT_DB2QBGB2).
*--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_DB2QBGB INDEX 1 INTO DATA(WA_DB2QBGB2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_DB2QBGB ASSIGNING <DB2QBGB>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DB2QBGB>-QBGBGN = 1.
<DB2QBGB>-QBGBGR1 = 1.
<DB2QBGB>-QBGBGR2 = 1.
<DB2QBGB>-QBGBGCT = 1.
<DB2QBGB>-QBGBGGT = 1.

ENDLOOP.

LOOP AT IT_DB2QBGB INTO WA_DB2QBGB.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DB2QBGB-QBGBGAS, sy-vline,
  WA_DB2QBGB-QBGBGCS, sy-vline,
  WA_DB2QBGB-QBGBGCK, sy-vline,
  WA_DB2QBGB-QBGBGSZ, sy-vline,
  WA_DB2QBGB-QBGBGDR, sy-vline,
  WA_DB2QBGB-QBGBGDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DB2QBGB 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_DB2QBGB 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_DB2QBGB INTO WA_DB2QBGB.


*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_DB2QBGB_STR, 
QBGBGN TYPE STRING,
QBGBGR1 TYPE STRING,
QBGBGR2 TYPE STRING,
QBGBGCT TYPE STRING,
QBGBGGT TYPE STRING,
QBGBGAS TYPE STRING,
QBGBGCS TYPE STRING,
QBGBGCK TYPE STRING,
QBGBGSZ TYPE STRING,
QBGBGDR TYPE STRING,
QBGBGDT TYPE STRING,
QBGBDRR TYPE STRING,
QBGBDTR TYPE STRING,
QBGBRXI TYPE STRING,
QBGBTCC TYPE STRING,
QBGBDUP TYPE STRING,
QBGBGSZ2 TYPE STRING,
QBGBGDR2 TYPE STRING,
QBGBGDT2 TYPE STRING,
QBGBGCTN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DB2QBGB_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_DB2QBGB_STR-QBGBGN sy-vline 
WA_DB2QBGB_STR-QBGBGR1 sy-vline 
WA_DB2QBGB_STR-QBGBGR2 sy-vline 
WA_DB2QBGB_STR-QBGBGCT sy-vline 
WA_DB2QBGB_STR-QBGBGGT sy-vline 
WA_DB2QBGB_STR-QBGBGAS sy-vline 
WA_DB2QBGB_STR-QBGBGCS sy-vline 
WA_DB2QBGB_STR-QBGBGCK sy-vline 
WA_DB2QBGB_STR-QBGBGSZ sy-vline 
WA_DB2QBGB_STR-QBGBGDR sy-vline 
WA_DB2QBGB_STR-QBGBGDT sy-vline 
WA_DB2QBGB_STR-QBGBDRR sy-vline 
WA_DB2QBGB_STR-QBGBDTR sy-vline 
WA_DB2QBGB_STR-QBGBRXI sy-vline 
WA_DB2QBGB_STR-QBGBTCC sy-vline 
WA_DB2QBGB_STR-QBGBDUP sy-vline 
WA_DB2QBGB_STR-QBGBGSZ2 sy-vline 
WA_DB2QBGB_STR-QBGBGDR2 sy-vline 
WA_DB2QBGB_STR-QBGBGDT2 sy-vline 
WA_DB2QBGB_STR-QBGBGCTN sy-vline      INTO ld_text SEPARATED BY SPACE.

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