ABAP Select data from SAP table AFWCH_DRSF_SAMP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFWCH_DRSF_SAMP
*  INTO TABLE @DATA(IT_AFWCH_DRSF_SAMP2).
*--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_AFWCH_DRSF_SAMP INDEX 1 INTO DATA(WA_AFWCH_DRSF_SAMP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFWCH_DRSF_SAMP>-APPLCLASS = 1.
<AFWCH_DRSF_SAMP>-SUBCLASS = 1.
<AFWCH_DRSF_SAMP>-KEDRSTRATID = 1.
<AFWCH_DRSF_SAMP>-KEDRENV = 1.
<AFWCH_DRSF_SAMP>-STEP_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFWCH_DRSF_SAMP-FIELDCLASS, sy-vline,
  WA_AFWCH_DRSF_SAMP-SEQ_NO, sy-vline,
  WA_AFWCH_DRSF_SAMP-IDENTIFIER, sy-vline,
  WA_AFWCH_DRSF_SAMP-TABNAME, sy-vline,
  WA_AFWCH_DRSF_SAMP-FIELDNAME, sy-vline,
  WA_AFWCH_DRSF_SAMP-ISMANDATORY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFWCH_DRSF_SAMP 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_AFWCH_DRSF_SAMP 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_AFWCH_DRSF_SAMP INTO WA_AFWCH_DRSF_SAMP.


*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_AFWCH_DRSF_SAMP_STR, 
APPLCLASS TYPE STRING,
SUBCLASS TYPE STRING,
KEDRSTRATID TYPE STRING,
KEDRENV TYPE STRING,
STEP_NO TYPE STRING,
FIELDCLASS TYPE STRING,
SEQ_NO TYPE STRING,
IDENTIFIER TYPE STRING,
TABNAME TYPE STRING,
FIELDNAME TYPE STRING,
ISMANDATORY TYPE STRING,
ISPICKABLE TYPE STRING,
USEOFFSET TYPE STRING,
SUBOFFSET TYPE STRING,
SUBLENGTH TYPE STRING,
USECONSTANT TYPE STRING,
CONSTANT TYPE STRING,
BLANKISALLOWED TYPE STRING,
OVERWRITE TYPE STRING,
NO_VALUE_TEXT TYPE STRING,
NO_VALUE_RANGE TYPE STRING,
OPERATOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFWCH_DRSF_SAMP_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_AFWCH_DRSF_SAMP_STR-APPLCLASS sy-vline 
WA_AFWCH_DRSF_SAMP_STR-SUBCLASS sy-vline 
WA_AFWCH_DRSF_SAMP_STR-KEDRSTRATID sy-vline 
WA_AFWCH_DRSF_SAMP_STR-KEDRENV sy-vline 
WA_AFWCH_DRSF_SAMP_STR-STEP_NO sy-vline 
WA_AFWCH_DRSF_SAMP_STR-FIELDCLASS sy-vline 
WA_AFWCH_DRSF_SAMP_STR-SEQ_NO sy-vline 
WA_AFWCH_DRSF_SAMP_STR-IDENTIFIER sy-vline 
WA_AFWCH_DRSF_SAMP_STR-TABNAME sy-vline 
WA_AFWCH_DRSF_SAMP_STR-FIELDNAME sy-vline 
WA_AFWCH_DRSF_SAMP_STR-ISMANDATORY sy-vline 
WA_AFWCH_DRSF_SAMP_STR-ISPICKABLE sy-vline 
WA_AFWCH_DRSF_SAMP_STR-USEOFFSET sy-vline 
WA_AFWCH_DRSF_SAMP_STR-SUBOFFSET sy-vline 
WA_AFWCH_DRSF_SAMP_STR-SUBLENGTH sy-vline 
WA_AFWCH_DRSF_SAMP_STR-USECONSTANT sy-vline 
WA_AFWCH_DRSF_SAMP_STR-CONSTANT sy-vline 
WA_AFWCH_DRSF_SAMP_STR-BLANKISALLOWED sy-vline 
WA_AFWCH_DRSF_SAMP_STR-OVERWRITE sy-vline 
WA_AFWCH_DRSF_SAMP_STR-NO_VALUE_TEXT sy-vline 
WA_AFWCH_DRSF_SAMP_STR-NO_VALUE_RANGE sy-vline 
WA_AFWCH_DRSF_SAMP_STR-OPERATOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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