ABAP Select data from SAP table EXTR_LIST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EXTR_LIST
*  INTO TABLE @DATA(IT_EXTR_LIST2).
*--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_EXTR_LIST INDEX 1 INTO DATA(WA_EXTR_LIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EXTR_LIST>-HASHV = 1.
<EXTR_LIST>-COUNTERV = 1.
<EXTR_LIST>-RGJNR = 1.
<EXTR_LIST>-HASH = 1.
<EXTR_LIST>-COUNTER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EXTR_LIST-CRNAM, sy-vline,
  WA_EXTR_LIST-CRDAT, sy-vline,
  WA_EXTR_LIST-CRTIME, sy-vline,
  WA_EXTR_LIST-VERSN, sy-vline,
  WA_EXTR_LIST-MASTERDAT, sy-vline,
  WA_EXTR_LIST-STATUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EXTR_LIST 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_EXTR_LIST 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_EXTR_LIST INTO WA_EXTR_LIST.


*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 ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_EXTR_LIST-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EXTR_LIST-LANGU.
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_EXTR_LIST_STR, 
HASHV TYPE STRING,
COUNTERV TYPE STRING,
RGJNR TYPE STRING,
HASH TYPE STRING,
COUNTER TYPE STRING,
CRNAM TYPE STRING,
CRDAT TYPE STRING,
CRTIME TYPE STRING,
VERSN TYPE STRING,
MASTERDAT TYPE STRING,
STATUS TYPE STRING,
STATUS_AU TYPE STRING,
GRSIZE TYPE STRING,
VALDATE TYPE STRING,
GRIX_COUNT TYPE STRING,
JTEXT TYPE STRING,
LANGU TYPE STRING,
LTEXT TYPE STRING,
MARKED TYPE STRING,
COMPLETE_EXTRAKT TYPE STRING,
VALUE1 TYPE STRING,
VALUE2 TYPE STRING,
VALUE3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EXTR_LIST_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_EXTR_LIST_STR-HASHV sy-vline 
WA_EXTR_LIST_STR-COUNTERV sy-vline 
WA_EXTR_LIST_STR-RGJNR sy-vline 
WA_EXTR_LIST_STR-HASH sy-vline 
WA_EXTR_LIST_STR-COUNTER sy-vline 
WA_EXTR_LIST_STR-CRNAM sy-vline 
WA_EXTR_LIST_STR-CRDAT sy-vline 
WA_EXTR_LIST_STR-CRTIME sy-vline 
WA_EXTR_LIST_STR-VERSN sy-vline 
WA_EXTR_LIST_STR-MASTERDAT sy-vline 
WA_EXTR_LIST_STR-STATUS sy-vline 
WA_EXTR_LIST_STR-STATUS_AU sy-vline 
WA_EXTR_LIST_STR-GRSIZE sy-vline 
WA_EXTR_LIST_STR-VALDATE sy-vline 
WA_EXTR_LIST_STR-GRIX_COUNT sy-vline 
WA_EXTR_LIST_STR-JTEXT sy-vline 
WA_EXTR_LIST_STR-LANGU sy-vline 
WA_EXTR_LIST_STR-LTEXT sy-vline 
WA_EXTR_LIST_STR-MARKED sy-vline 
WA_EXTR_LIST_STR-COMPLETE_EXTRAKT sy-vline 
WA_EXTR_LIST_STR-VALUE1 sy-vline 
WA_EXTR_LIST_STR-VALUE2 sy-vline 
WA_EXTR_LIST_STR-VALUE3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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