ABAP Select data from SAP table HRESSDE_ATZ into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM HRESSDE_ATZ
*  INTO TABLE @DATA(IT_HRESSDE_ATZ2).
*--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_HRESSDE_ATZ INDEX 1 INTO DATA(WA_HRESSDE_ATZ2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<HRESSDE_ATZ>-SDATE = 1.
<HRESSDE_ATZ>-ATZMO = 1.
<HRESSDE_ATZ>-ATZTX = 1.
<HRESSDE_ATZ>-ATZA1 = 1.
<HRESSDE_ATZ>-ATZPN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_HRESSDE_ATZ-P0008, sy-vline,
  WA_HRESSDE_ATZ-P007A, sy-vline,
  WA_HRESSDE_ATZ-P007B, sy-vline,
  WA_HRESSDE_ATZ-SCHKZ, sy-vline,
  WA_HRESSDE_ATZ-P0010, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_HRESSDE_ATZ 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_HRESSDE_ATZ 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_HRESSDE_ATZ INTO WA_HRESSDE_ATZ.


*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_HRESSDE_ATZ_STR, 
SDATE TYPE STRING,
ATZMO TYPE STRING,
ATZTX TYPE STRING,
ATZA1 TYPE STRING,
ATZPN TYPE STRING,
P0008 TYPE STRING,
P007A TYPE STRING,
P007B TYPE STRING,
SCHKZ TYPE STRING,
P0010 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_HRESSDE_ATZ_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_HRESSDE_ATZ_STR-SDATE sy-vline 
WA_HRESSDE_ATZ_STR-ATZMO sy-vline 
WA_HRESSDE_ATZ_STR-ATZTX sy-vline 
WA_HRESSDE_ATZ_STR-ATZA1 sy-vline 
WA_HRESSDE_ATZ_STR-ATZPN sy-vline 
WA_HRESSDE_ATZ_STR-P0008 sy-vline 
WA_HRESSDE_ATZ_STR-P007A sy-vline 
WA_HRESSDE_ATZ_STR-P007B sy-vline 
WA_HRESSDE_ATZ_STR-SCHKZ sy-vline 
WA_HRESSDE_ATZ_STR-P0010 sy-vline      INTO ld_text SEPARATED BY SPACE.

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