ABAP Select data from SAP table TZ41 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP TZ41 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 TZ41. 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 TZ41 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_TZ41 TYPE STANDARD TABLE OF TZ41,
      WA_TZ41 TYPE TZ41,
      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: <TZ41> TYPE TZ41.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TZ41.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TZ41
  INTO TABLE IT_TZ41.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TZ41
*  INTO TABLE @DATA(IT_TZ412).
*--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_TZ41 INDEX 1 INTO DATA(WA_TZ412).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TZ41 ASSIGNING <TZ41>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TZ41>-XLAND = 1.
<TZ41>-GSART = 1.
<TZ41>-DGUEL_TAGE = 1.
<TZ41>-SSKZB = 1.
<TZ41>-SUDEC = 1.

ENDLOOP.

LOOP AT IT_TZ41 INTO WA_TZ41.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TZ41-SDV, sy-vline,
  WA_TZ41-SUABT, sy-vline,
  WA_TZ41-SSKZF, sy-vline,
  WA_TZ41-SNW600, sy-vline,
  WA_TZ41-SMWWHR, sy-vline,
  WA_TZ41-BARWBAV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TZ41 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_TZ41 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_TZ41 INTO WA_TZ41.


*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_TZ41_STR, 
XLAND TYPE STRING,
GSART TYPE STRING,
DGUEL_TAGE TYPE STRING,
SSKZB TYPE STRING,
SUDEC TYPE STRING,
SDV TYPE STRING,
SUABT TYPE STRING,
SSKZF TYPE STRING,
SNW600 TYPE STRING,
SMWWHR TYPE STRING,
BARWBAV TYPE STRING,
SAWHR TYPE STRING,
FELDAUSW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TZ41_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_TZ41_STR-XLAND sy-vline 
WA_TZ41_STR-GSART sy-vline 
WA_TZ41_STR-DGUEL_TAGE sy-vline 
WA_TZ41_STR-SSKZB sy-vline 
WA_TZ41_STR-SUDEC sy-vline 
WA_TZ41_STR-SDV sy-vline 
WA_TZ41_STR-SUABT sy-vline 
WA_TZ41_STR-SSKZF sy-vline 
WA_TZ41_STR-SNW600 sy-vline 
WA_TZ41_STR-SMWWHR sy-vline 
WA_TZ41_STR-BARWBAV sy-vline 
WA_TZ41_STR-SAWHR sy-vline 
WA_TZ41_STR-FELDAUSW sy-vline      INTO ld_text SEPARATED BY SPACE.

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