ABAP Select data from SAP table HRESS_S_A1_LIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP HRESS_S_A1_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 HRESS_S_A1_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 HRESS_S_A1_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_HRESS_S_A1_LIST TYPE STANDARD TABLE OF HRESS_S_A1_LIST,
      WA_HRESS_S_A1_LIST TYPE HRESS_S_A1_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: <HRESS_S_A1_LIST> TYPE HRESS_S_A1_LIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_HRESS_S_A1_LIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM HRESS_S_A1_LIST
  INTO TABLE IT_HRESS_S_A1_LIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRESS_S_A1_LIST
*  INTO TABLE @DATA(IT_HRESS_S_A1_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_HRESS_S_A1_LIST INDEX 1 INTO DATA(WA_HRESS_S_A1_LIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_HRESS_S_A1_LIST ASSIGNING <HRESS_S_A1_LIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRESS_S_A1_LIST>-LAND = 1.
<HRESS_S_A1_LIST>-LANDX = 1.
<HRESS_S_A1_LIST>-LAND2 = 1.
<HRESS_S_A1_LIST>-LANDX2 = 1.
<HRESS_S_A1_LIST>-LAND3 = 1.

ENDLOOP.

LOOP AT IT_HRESS_S_A1_LIST INTO WA_HRESS_S_A1_LIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRESS_S_A1_LIST-LANDX3, sy-vline,
  WA_HRESS_S_A1_LIST-STATUS, sy-vline,
  WA_HRESS_S_A1_LIST-STATTX, sy-vline,
  WA_HRESS_S_A1_LIST-STRUCT, sy-vline,
  WA_HRESS_S_A1_LIST-GUID, sy-vline,
  WA_HRESS_S_A1_LIST-PERNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_HRESS_S_A1_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_HRESS_S_A1_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_HRESS_S_A1_LIST INTO WA_HRESS_S_A1_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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_HRESS_S_A1_LIST_STR, 
LAND TYPE STRING,
LANDX TYPE STRING,
LAND2 TYPE STRING,
LANDX2 TYPE STRING,
LAND3 TYPE STRING,
LANDX3 TYPE STRING,
STATUS TYPE STRING,
STATTX TYPE STRING,
STRUCT TYPE STRING,
GUID TYPE STRING,
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
DATA TYPE STRING,
ROW_ACTION_ENABLED_A TYPE STRING,
ROW_ACTION_ENABLED_B TYPE STRING,
ROW_ACTION_VISIBLE_A TYPE STRING,
ROW_ACTION_VISIBLE_B TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRESS_S_A1_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_HRESS_S_A1_LIST_STR-LAND sy-vline 
WA_HRESS_S_A1_LIST_STR-LANDX sy-vline 
WA_HRESS_S_A1_LIST_STR-LAND2 sy-vline 
WA_HRESS_S_A1_LIST_STR-LANDX2 sy-vline 
WA_HRESS_S_A1_LIST_STR-LAND3 sy-vline 
WA_HRESS_S_A1_LIST_STR-LANDX3 sy-vline 
WA_HRESS_S_A1_LIST_STR-STATUS sy-vline 
WA_HRESS_S_A1_LIST_STR-STATTX sy-vline 
WA_HRESS_S_A1_LIST_STR-STRUCT sy-vline 
WA_HRESS_S_A1_LIST_STR-GUID sy-vline 
WA_HRESS_S_A1_LIST_STR-PERNR sy-vline 
WA_HRESS_S_A1_LIST_STR-INFTY sy-vline 
WA_HRESS_S_A1_LIST_STR-SUBTY sy-vline 
WA_HRESS_S_A1_LIST_STR-OBJPS sy-vline 
WA_HRESS_S_A1_LIST_STR-SPRPS sy-vline 
WA_HRESS_S_A1_LIST_STR-ENDDA sy-vline 
WA_HRESS_S_A1_LIST_STR-BEGDA sy-vline 
WA_HRESS_S_A1_LIST_STR-SEQNR sy-vline 
WA_HRESS_S_A1_LIST_STR-DATA sy-vline 
WA_HRESS_S_A1_LIST_STR-ROW_ACTION_ENABLED_A sy-vline 
WA_HRESS_S_A1_LIST_STR-ROW_ACTION_ENABLED_B sy-vline 
WA_HRESS_S_A1_LIST_STR-ROW_ACTION_VISIBLE_A sy-vline 
WA_HRESS_S_A1_LIST_STR-ROW_ACTION_VISIBLE_B sy-vline      INTO ld_text SEPARATED BY SPACE.

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