ABAP Select data from SAP table GB92 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP GB92 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 GB92. 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 GB92 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_GB92 TYPE STANDARD TABLE OF GB92,
      WA_GB92 TYPE GB92,
      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: <GB92> TYPE GB92.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_GB92.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM GB92
  INTO TABLE IT_GB92.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM GB92
*  INTO TABLE @DATA(IT_GB922).
*--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_GB92 INDEX 1 INTO DATA(WA_GB922).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_GB92 ASSIGNING <GB92>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<GB92>-MANDT = 1.
<GB92>-SUBSTID = 1.
<GB92>-BOOLCLASS = 1.
<GB92>-SUBSCLASS = 1.
<GB92>-EXIT = 1.

ENDLOOP.

LOOP AT IT_GB92 INTO WA_GB92.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_GB92-AUTHGR, sy-vline,
  WA_GB92-GBOPCREATE, sy-vline,
  WA_GB92-GBDTCREATE, sy-vline,
  WA_GB92-GBTMCREATE, sy-vline,
  WA_GB92-GBOPCHANGE, sy-vline,
  WA_GB92-GBDTCHANGE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_GB92 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_GB92 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_GB92 INTO WA_GB92.


*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_GB92-BOOLCLASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GB92-BOOLCLASS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SUBSCLASS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_GB92-SUBSCLASS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_GB92-SUBSCLASS.
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_GB92_STR, 
MANDT TYPE STRING,
SUBSTID TYPE STRING,
BOOLCLASS TYPE STRING,
SUBSCLASS TYPE STRING,
EXIT TYPE STRING,
AUTHGR TYPE STRING,
GBOPCREATE TYPE STRING,
GBDTCREATE TYPE STRING,
GBTMCREATE TYPE STRING,
GBOPCHANGE TYPE STRING,
GBDTCHANGE TYPE STRING,
GBTMCHANGE TYPE STRING,
INITEXIT TYPE STRING,
MULTILINE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_GB92_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_GB92_STR-MANDT sy-vline 
WA_GB92_STR-SUBSTID sy-vline 
WA_GB92_STR-BOOLCLASS sy-vline 
WA_GB92_STR-SUBSCLASS sy-vline 
WA_GB92_STR-EXIT sy-vline 
WA_GB92_STR-AUTHGR sy-vline 
WA_GB92_STR-GBOPCREATE sy-vline 
WA_GB92_STR-GBDTCREATE sy-vline 
WA_GB92_STR-GBTMCREATE sy-vline 
WA_GB92_STR-GBOPCHANGE sy-vline 
WA_GB92_STR-GBDTCHANGE sy-vline 
WA_GB92_STR-GBTMCHANGE sy-vline 
WA_GB92_STR-INITEXIT sy-vline 
WA_GB92_STR-MULTILINE sy-vline      INTO ld_text SEPARATED BY SPACE.

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