ABAP Select data from SAP table WRF_AT_SCHED_STY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WRF_AT_SCHED_STY
*  INTO TABLE @DATA(IT_WRF_AT_SCHED_STY2).
*--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_WRF_AT_SCHED_STY INDEX 1 INTO DATA(WA_WRF_AT_SCHED_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WRF_AT_SCHED_STY>-MATNR = 1.
<WRF_AT_SCHED_STY>-ERVON = 1.
<WRF_AT_SCHED_STY>-VLFKZ = 1.
<WRF_AT_SCHED_STY>-SATNR = 1.
<WRF_AT_SCHED_STY>-UPTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WRF_AT_SCHED_STY-SIMULATE, sy-vline,
  WA_WRF_AT_SCHED_STY-BUFFER_SET, sy-vline,
  WA_WRF_AT_SCHED_STY-BUFFER_USE, sy-vline,
  WA_WRF_AT_SCHED_STY-BUFFER_REF, sy-vline,
  WA_WRF_AT_SCHED_STY-T621, sy-vline,
  WA_WRF_AT_SCHED_STY-MANDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WRF_AT_SCHED_STY 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_WRF_AT_SCHED_STY 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_WRF_AT_SCHED_STY INTO WA_WRF_AT_SCHED_STY.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_AT_SCHED_STY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_AT_SCHED_STY-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field SATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_WRF_AT_SCHED_STY-SATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_AT_SCHED_STY-SATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AUART, internal->external for field KAART
CALL FUNCTION 'CONVERSION_EXIT_AUART_OUTPUT'
  EXPORTING
    input =                      WA_WRF_AT_SCHED_STY-KAART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_WRF_AT_SCHED_STY-KAART.
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_WRF_AT_SCHED_STY_STR, 
MATNR TYPE STRING,
ERVON TYPE STRING,
VLFKZ TYPE STRING,
SATNR TYPE STRING,
UPTYP TYPE STRING,
SIMULATE TYPE STRING,
BUFFER_SET TYPE STRING,
BUFFER_USE TYPE STRING,
BUFFER_REF TYPE STRING,
T621 TYPE STRING,
MANDT TYPE STRING,
APSTP TYPE STRING,
BSTGE TYPE STRING,
UMLGE TYPE STRING,
AAFBG TYPE STRING,
WEFBG TYPE STRING,
LFART TYPE STRING,
BZQFI TYPE STRING,
POSGR TYPE STRING,
BSART TYPE STRING,
UMART TYPE STRING,
BSART_GL_BUKRS TYPE STRING,
ASNRM TYPE STRING,
BSTZU TYPE STRING,
UMLZU TYPE STRING,
LIEZU TYPE STRING,
TERMG TYPE STRING,
VZWBG TYPE STRING,
LFIND TYPE STRING,
KAART TYPE STRING,
DETDELDATE TYPE STRING,
DETDELDATE_VZ TYPE STRING,
PRIO_ORDER_TYPE TYPE STRING,
TERMG_NO_WEBAZ TYPE STRING,
WRF_TERMG_REACT TYPE STRING,
CONS_MODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WRF_AT_SCHED_STY_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_WRF_AT_SCHED_STY_STR-MATNR sy-vline 
WA_WRF_AT_SCHED_STY_STR-ERVON sy-vline 
WA_WRF_AT_SCHED_STY_STR-VLFKZ sy-vline 
WA_WRF_AT_SCHED_STY_STR-SATNR sy-vline 
WA_WRF_AT_SCHED_STY_STR-UPTYP sy-vline 
WA_WRF_AT_SCHED_STY_STR-SIMULATE sy-vline 
WA_WRF_AT_SCHED_STY_STR-BUFFER_SET sy-vline 
WA_WRF_AT_SCHED_STY_STR-BUFFER_USE sy-vline 
WA_WRF_AT_SCHED_STY_STR-BUFFER_REF sy-vline 
WA_WRF_AT_SCHED_STY_STR-T621 sy-vline 
WA_WRF_AT_SCHED_STY_STR-MANDT sy-vline 
WA_WRF_AT_SCHED_STY_STR-APSTP sy-vline 
WA_WRF_AT_SCHED_STY_STR-BSTGE sy-vline 
WA_WRF_AT_SCHED_STY_STR-UMLGE sy-vline 
WA_WRF_AT_SCHED_STY_STR-AAFBG sy-vline 
WA_WRF_AT_SCHED_STY_STR-WEFBG sy-vline 
WA_WRF_AT_SCHED_STY_STR-LFART sy-vline 
WA_WRF_AT_SCHED_STY_STR-BZQFI sy-vline 
WA_WRF_AT_SCHED_STY_STR-POSGR sy-vline 
WA_WRF_AT_SCHED_STY_STR-BSART sy-vline 
WA_WRF_AT_SCHED_STY_STR-UMART sy-vline 
WA_WRF_AT_SCHED_STY_STR-BSART_GL_BUKRS sy-vline 
WA_WRF_AT_SCHED_STY_STR-ASNRM sy-vline 
WA_WRF_AT_SCHED_STY_STR-BSTZU sy-vline 
WA_WRF_AT_SCHED_STY_STR-UMLZU sy-vline 
WA_WRF_AT_SCHED_STY_STR-LIEZU sy-vline 
WA_WRF_AT_SCHED_STY_STR-TERMG sy-vline 
WA_WRF_AT_SCHED_STY_STR-VZWBG sy-vline 
WA_WRF_AT_SCHED_STY_STR-LFIND sy-vline 
WA_WRF_AT_SCHED_STY_STR-KAART sy-vline 
WA_WRF_AT_SCHED_STY_STR-DETDELDATE sy-vline 
WA_WRF_AT_SCHED_STY_STR-DETDELDATE_VZ sy-vline 
WA_WRF_AT_SCHED_STY_STR-PRIO_ORDER_TYPE sy-vline 
WA_WRF_AT_SCHED_STY_STR-TERMG_NO_WEBAZ sy-vline 
WA_WRF_AT_SCHED_STY_STR-WRF_TERMG_REACT sy-vline 
WA_WRF_AT_SCHED_STY_STR-CONS_MODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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