ABAP Select data from SAP table J_3GLISTVAL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3GLISTVAL 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 J_3GLISTVAL. 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 J_3GLISTVAL 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_J_3GLISTVAL TYPE STANDARD TABLE OF J_3GLISTVAL,
      WA_J_3GLISTVAL TYPE J_3GLISTVAL,
      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: <J_3GLISTVAL> TYPE J_3GLISTVAL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3GLISTVAL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3GLISTVAL
  INTO TABLE IT_J_3GLISTVAL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3GLISTVAL
*  INTO TABLE @DATA(IT_J_3GLISTVAL2).
*--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_J_3GLISTVAL INDEX 1 INTO DATA(WA_J_3GLISTVAL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3GLISTVAL ASSIGNING <J_3GLISTVAL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3GLISTVAL>-VALUE01 = 1.
<J_3GLISTVAL>-VALUE02 = 1.
<J_3GLISTVAL>-VALUE03 = 1.
<J_3GLISTVAL>-VALUE04 = 1.
<J_3GLISTVAL>-VALUE05 = 1.

ENDLOOP.

LOOP AT IT_J_3GLISTVAL INTO WA_J_3GLISTVAL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3GLISTVAL-VALUE06, sy-vline,
  WA_J_3GLISTVAL-VALUE07, sy-vline,
  WA_J_3GLISTVAL-VALUE08, sy-vline,
  WA_J_3GLISTVAL-VALUE09, sy-vline,
  WA_J_3GLISTVAL-VALUE10, sy-vline,
  WA_J_3GLISTVAL-VALUE11, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3GLISTVAL 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_J_3GLISTVAL 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_J_3GLISTVAL INTO WA_J_3GLISTVAL.


*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_J_3GLISTVAL_STR, 
VALUE01 TYPE STRING,
VALUE02 TYPE STRING,
VALUE03 TYPE STRING,
VALUE04 TYPE STRING,
VALUE05 TYPE STRING,
VALUE06 TYPE STRING,
VALUE07 TYPE STRING,
VALUE08 TYPE STRING,
VALUE09 TYPE STRING,
VALUE10 TYPE STRING,
VALUE11 TYPE STRING,
VALUE12 TYPE STRING,
VALUE13 TYPE STRING,
VALUE14 TYPE STRING,
VALUE15 TYPE STRING,
VALUE16 TYPE STRING,
VALUE17 TYPE STRING,
VALUE18 TYPE STRING,
VALUE19 TYPE STRING,
VALUE20 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3GLISTVAL_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_J_3GLISTVAL_STR-VALUE01 sy-vline 
WA_J_3GLISTVAL_STR-VALUE02 sy-vline 
WA_J_3GLISTVAL_STR-VALUE03 sy-vline 
WA_J_3GLISTVAL_STR-VALUE04 sy-vline 
WA_J_3GLISTVAL_STR-VALUE05 sy-vline 
WA_J_3GLISTVAL_STR-VALUE06 sy-vline 
WA_J_3GLISTVAL_STR-VALUE07 sy-vline 
WA_J_3GLISTVAL_STR-VALUE08 sy-vline 
WA_J_3GLISTVAL_STR-VALUE09 sy-vline 
WA_J_3GLISTVAL_STR-VALUE10 sy-vline 
WA_J_3GLISTVAL_STR-VALUE11 sy-vline 
WA_J_3GLISTVAL_STR-VALUE12 sy-vline 
WA_J_3GLISTVAL_STR-VALUE13 sy-vline 
WA_J_3GLISTVAL_STR-VALUE14 sy-vline 
WA_J_3GLISTVAL_STR-VALUE15 sy-vline 
WA_J_3GLISTVAL_STR-VALUE16 sy-vline 
WA_J_3GLISTVAL_STR-VALUE17 sy-vline 
WA_J_3GLISTVAL_STR-VALUE18 sy-vline 
WA_J_3GLISTVAL_STR-VALUE19 sy-vline 
WA_J_3GLISTVAL_STR-VALUE20 sy-vline      INTO ld_text SEPARATED BY SPACE.

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