ABAP Select data from SAP table FKKDOC_SUBSCREENS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKDOC_SUBSCREENS
*  INTO TABLE @DATA(IT_FKKDOC_SUBSCREENS2).
*--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_FKKDOC_SUBSCREENS INDEX 1 INTO DATA(WA_FKKDOC_SUBSCREENS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKDOC_SUBSCREENS>-MPOOL = 1.
<FKKDOC_SUBSCREENS>-DYNNR = 1.
<FKKDOC_SUBSCREENS>-INIFM = 1.
<FKKDOC_SUBSCREENS>-PBOFM = 1.
<FKKDOC_SUBSCREENS>-PAIFM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKDOC_SUBSCREENS-TSTXT, sy-vline,
  WA_FKKDOC_SUBSCREENS-LINES, sy-vline,
  WA_FKKDOC_SUBSCREENS-MPOOL_CUST, sy-vline,
  WA_FKKDOC_SUBSCREENS-DYNNR_CUST, sy-vline,
  WA_FKKDOC_SUBSCREENS-INIFM_CUST, sy-vline,
  WA_FKKDOC_SUBSCREENS-PBOFM_CUST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKDOC_SUBSCREENS 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_FKKDOC_SUBSCREENS 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_FKKDOC_SUBSCREENS INTO WA_FKKDOC_SUBSCREENS.


*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_FKKDOC_SUBSCREENS_STR, 
MPOOL TYPE STRING,
DYNNR TYPE STRING,
INIFM TYPE STRING,
PBOFM TYPE STRING,
PAIFM TYPE STRING,
TSTXT TYPE STRING,
LINES TYPE STRING,
MPOOL_CUST TYPE STRING,
DYNNR_CUST TYPE STRING,
INIFM_CUST TYPE STRING,
PBOFM_CUST TYPE STRING,
PAIFM_CUST TYPE STRING,
TSTXT_CUST TYPE STRING,
LINES_CUST TYPE STRING,
MPOOL_AOP TYPE STRING,
DYNNR_AOP TYPE STRING,
INIFM_AOP TYPE STRING,
PBOFM_AOP TYPE STRING,
PAIFM_AOP TYPE STRING,
TSTXT_AOP TYPE STRING,
LINES_AOP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKDOC_SUBSCREENS_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_FKKDOC_SUBSCREENS_STR-MPOOL sy-vline 
WA_FKKDOC_SUBSCREENS_STR-DYNNR sy-vline 
WA_FKKDOC_SUBSCREENS_STR-INIFM sy-vline 
WA_FKKDOC_SUBSCREENS_STR-PBOFM sy-vline 
WA_FKKDOC_SUBSCREENS_STR-PAIFM sy-vline 
WA_FKKDOC_SUBSCREENS_STR-TSTXT sy-vline 
WA_FKKDOC_SUBSCREENS_STR-LINES sy-vline 
WA_FKKDOC_SUBSCREENS_STR-MPOOL_CUST sy-vline 
WA_FKKDOC_SUBSCREENS_STR-DYNNR_CUST sy-vline 
WA_FKKDOC_SUBSCREENS_STR-INIFM_CUST sy-vline 
WA_FKKDOC_SUBSCREENS_STR-PBOFM_CUST sy-vline 
WA_FKKDOC_SUBSCREENS_STR-PAIFM_CUST sy-vline 
WA_FKKDOC_SUBSCREENS_STR-TSTXT_CUST sy-vline 
WA_FKKDOC_SUBSCREENS_STR-LINES_CUST sy-vline 
WA_FKKDOC_SUBSCREENS_STR-MPOOL_AOP sy-vline 
WA_FKKDOC_SUBSCREENS_STR-DYNNR_AOP sy-vline 
WA_FKKDOC_SUBSCREENS_STR-INIFM_AOP sy-vline 
WA_FKKDOC_SUBSCREENS_STR-PBOFM_AOP sy-vline 
WA_FKKDOC_SUBSCREENS_STR-PAIFM_AOP sy-vline 
WA_FKKDOC_SUBSCREENS_STR-TSTXT_AOP sy-vline 
WA_FKKDOC_SUBSCREENS_STR-LINES_AOP sy-vline      INTO ld_text SEPARATED BY SPACE.

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