ABAP Select data from SAP table AFFH_CLEAR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM AFFH_CLEAR
*  INTO TABLE @DATA(IT_AFFH_CLEAR2).
*--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_AFFH_CLEAR INDEX 1 INTO DATA(WA_AFFH_CLEAR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<AFFH_CLEAR>-AUFPL = 1.
<AFFH_CLEAR>-LOEKZ = 1.
<AFFH_CLEAR>-PARKZ = 1.
<AFFH_CLEAR>-DATUI = 1.
<AFFH_CLEAR>-USERI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_AFFH_CLEAR-DATUC, sy-vline,
  WA_AFFH_CLEAR-USERC, sy-vline,
  WA_AFFH_CLEAR-OBJNR, sy-vline,
  WA_AFFH_CLEAR-MGISTEH, sy-vline,
  WA_AFFH_CLEAR-MGIST, sy-vline,
  WA_AFFH_CLEAR-MGRSTEH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_AFFH_CLEAR 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_AFFH_CLEAR 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_AFFH_CLEAR INTO WA_AFFH_CLEAR.


*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 CUNIT, internal->external for field MGISTEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFH_CLEAR-MGISTEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFH_CLEAR-MGISTEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MGRSTEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFH_CLEAR-MGRSTEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFH_CLEAR-MGRSTEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MGAUSEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFH_CLEAR-MGAUSEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFH_CLEAR-MGAUSEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EWISTEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFH_CLEAR-EWISTEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFH_CLEAR-EWISTEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EWRSTEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFH_CLEAR-EWRSTEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFH_CLEAR-EWRSTEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field DAUEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_AFFH_CLEAR-DAUEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_AFFH_CLEAR-DAUEH.
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_AFFH_CLEAR_STR, 
AUFPL TYPE STRING,
LOEKZ TYPE STRING,
PARKZ TYPE STRING,
DATUI TYPE STRING,
USERI TYPE STRING,
DATUC TYPE STRING,
USERC TYPE STRING,
OBJNR TYPE STRING,
MGISTEH TYPE STRING,
MGIST TYPE STRING,
MGRSTEH TYPE STRING,
MGRST TYPE STRING,
MGAUSEH TYPE STRING,
MGAUS TYPE STRING,
EWISTEH TYPE STRING,
EWIST TYPE STRING,
EWRSTEH TYPE STRING,
EWRST TYPE STRING,
FSFHD TYPE STRING,
FSFHZ TYPE STRING,
FEFHD TYPE STRING,
FEFHZ TYPE STRING,
SSFHD TYPE STRING,
SSFHZ TYPE STRING,
SEFHD TYPE STRING,
SEFHZ TYPE STRING,
ISFHD TYPE STRING,
ISFHZ TYPE STRING,
IEFHD TYPE STRING,
IEFHZ TYPE STRING,
DAUFL TYPE STRING,
DAUEH TYPE STRING,
VSNMR TYPE STRING,
ORGAUFPL TYPE STRING,
ORGPZLFH TYPE STRING,
OBJTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_AFFH_CLEAR_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_AFFH_CLEAR_STR-AUFPL sy-vline 
WA_AFFH_CLEAR_STR-LOEKZ sy-vline 
WA_AFFH_CLEAR_STR-PARKZ sy-vline 
WA_AFFH_CLEAR_STR-DATUI sy-vline 
WA_AFFH_CLEAR_STR-USERI sy-vline 
WA_AFFH_CLEAR_STR-DATUC sy-vline 
WA_AFFH_CLEAR_STR-USERC sy-vline 
WA_AFFH_CLEAR_STR-OBJNR sy-vline 
WA_AFFH_CLEAR_STR-MGISTEH sy-vline 
WA_AFFH_CLEAR_STR-MGIST sy-vline 
WA_AFFH_CLEAR_STR-MGRSTEH sy-vline 
WA_AFFH_CLEAR_STR-MGRST sy-vline 
WA_AFFH_CLEAR_STR-MGAUSEH sy-vline 
WA_AFFH_CLEAR_STR-MGAUS sy-vline 
WA_AFFH_CLEAR_STR-EWISTEH sy-vline 
WA_AFFH_CLEAR_STR-EWIST sy-vline 
WA_AFFH_CLEAR_STR-EWRSTEH sy-vline 
WA_AFFH_CLEAR_STR-EWRST sy-vline 
WA_AFFH_CLEAR_STR-FSFHD sy-vline 
WA_AFFH_CLEAR_STR-FSFHZ sy-vline 
WA_AFFH_CLEAR_STR-FEFHD sy-vline 
WA_AFFH_CLEAR_STR-FEFHZ sy-vline 
WA_AFFH_CLEAR_STR-SSFHD sy-vline 
WA_AFFH_CLEAR_STR-SSFHZ sy-vline 
WA_AFFH_CLEAR_STR-SEFHD sy-vline 
WA_AFFH_CLEAR_STR-SEFHZ sy-vline 
WA_AFFH_CLEAR_STR-ISFHD sy-vline 
WA_AFFH_CLEAR_STR-ISFHZ sy-vline 
WA_AFFH_CLEAR_STR-IEFHD sy-vline 
WA_AFFH_CLEAR_STR-IEFHZ sy-vline 
WA_AFFH_CLEAR_STR-DAUFL sy-vline 
WA_AFFH_CLEAR_STR-DAUEH sy-vline 
WA_AFFH_CLEAR_STR-VSNMR sy-vline 
WA_AFFH_CLEAR_STR-ORGAUFPL sy-vline 
WA_AFFH_CLEAR_STR-ORGPZLFH sy-vline 
WA_AFFH_CLEAR_STR-OBJTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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