ABAP Select data from SAP table H_WZRKTM 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 H_WZRKTM 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 H_WZRKTM. 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 H_WZRKTM 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_H_WZRKTM TYPE STANDARD TABLE OF H_WZRKTM,
      WA_H_WZRKTM TYPE H_WZRKTM,
      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: <H_WZRKTM> TYPE H_WZRKTM.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM H_WZRKTM
*  INTO TABLE @DATA(IT_H_WZRKTM2).
*--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_H_WZRKTM INDEX 1 INTO DATA(WA_H_WZRKTM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<H_WZRKTM>-MANDT = 1.
<H_WZRKTM>-WBELN = 1.
<H_WZRKTM>-LFART = 1.
<H_WZRKTM>-WRART = 1.
<H_WZRKTM>-WFDAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_H_WZRKTM-RFBSK, sy-vline,
  WA_H_WZRKTM-VKORG, sy-vline,
  WA_H_WZRKTM-VTWEG, sy-vline,
  WA_H_WZRKTM-SPART, sy-vline,
  WA_H_WZRKTM-BUKRS, sy-vline,
  WA_H_WZRKTM-ERDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_H_WZRKTM 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_H_WZRKTM 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_H_WZRKTM INTO WA_H_WZRKTM.


*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 ALPHA, internal->external for field WBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_H_WZRKTM-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_H_WZRKTM-WBELN.
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_H_WZRKTM_STR, 
MANDT TYPE STRING,
WBELN TYPE STRING,
LFART TYPE STRING,
WRART TYPE STRING,
WFDAT TYPE STRING,
RFBSK TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
BUKRS TYPE STRING,
ERDAT TYPE STRING,
ERNAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_H_WZRKTM_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_H_WZRKTM_STR-MANDT sy-vline 
WA_H_WZRKTM_STR-WBELN sy-vline 
WA_H_WZRKTM_STR-LFART sy-vline 
WA_H_WZRKTM_STR-WRART sy-vline 
WA_H_WZRKTM_STR-WFDAT sy-vline 
WA_H_WZRKTM_STR-RFBSK sy-vline 
WA_H_WZRKTM_STR-VKORG sy-vline 
WA_H_WZRKTM_STR-VTWEG sy-vline 
WA_H_WZRKTM_STR-SPART sy-vline 
WA_H_WZRKTM_STR-BUKRS sy-vline 
WA_H_WZRKTM_STR-ERDAT sy-vline 
WA_H_WZRKTM_STR-ERNAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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