ABAP Select data from SAP table GB01 into internal table



Get Example source ABAP code based on a different SAP table
  

Below is a number of ABAP code snippets to demonstrate how to select data from SAP GB01 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 GB01. 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 GB01 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_GB01 TYPE STANDARD TABLE OF GB01,
      WA_GB01 TYPE GB01,
      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: <GB01> TYPE GB01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_GB01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM GB01
  INTO TABLE IT_GB01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GB01
*  INTO TABLE @DATA(IT_GB012).
*--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_GB01 INDEX 1 INTO DATA(WA_GB012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_GB01 ASSIGNING <GB01>.
*To update a field value using a field symbol simply change the value via the field symbol pointer
<GB01>-BOOLCLASS = 1.
<GB01>-CLASSTYPE = 1.
<GB01>-BCLTAB = 1.
<GB01>-BCLFIELD = 1.
<GB01>-BEXCLUDE = 1.
ENDLOOP.

LOOP AT IT_GB01 INTO WA_GB01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline, ENDLOOP.
   
*Add any further fields from structure WA_GB01 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_GB01 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_GB01 INTO WA_GB01.


*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 BOOLCLASS CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT' EXPORTING input = WA_GB01-BOOLCLASS IMPORTING output = ld_input.
WRITE:/ 'Org Value:', WA_GB01-BOOLCLASS.
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_GB01_STR,
BOOLCLASS TYPE STRING,
CLASSTYPE TYPE STRING,
BCLTAB TYPE STRING,
BCLFIELD TYPE STRING,
BEXCLUDE TYPE STRING,END OF T_EKKO_STR. DATA: WA_GB01_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_GB01_STR-BOOLCLASS sy-vline
WA_GB01_STR-CLASSTYPE sy-vline
WA_GB01_STR-BCLTAB sy-vline
WA_GB01_STR-BCLFIELD sy-vline
WA_GB01_STR-BEXCLUDE sy-vline INTO ld_text SEPARATED BY SPACE. *Add any further fields from structure WA_EKKO_STR you want to CONCATENATE... ENDLOOP. ENDFORM.