ABAP Select data from SAP table FKC_INSTPLN_CHG_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKC_INSTPLN_CHG_DATA
*  INTO TABLE @DATA(IT_FKC_INSTPLN_CHG_DATA2).
*--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_FKC_INSTPLN_CHG_DATA INDEX 1 INTO DATA(WA_FKC_INSTPLN_CHG_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKC_INSTPLN_CHG_DATA>-INST_PLN_DOC = 1.
<FKC_INSTPLN_CHG_DATA>-OPUPK = 1.
<FKC_INSTPLN_CHG_DATA>-OPTXT = 1.
<FKC_INSTPLN_CHG_DATA>-FAEDN = 1.
<FKC_INSTPLN_CHG_DATA>-STUDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKC_INSTPLN_CHG_DATA-XMANL, sy-vline,
  WA_FKC_INSTPLN_CHG_DATA-BETRW, sy-vline,
  WA_FKC_INSTPLN_CHG_DATA-PYMET, sy-vline,
  WA_FKC_INSTPLN_CHG_DATA-AUGRS, sy-vline,
  WA_FKC_INSTPLN_CHG_DATA-EMBVT, sy-vline,
  WA_FKC_INSTPLN_CHG_DATA-EMCRD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKC_INSTPLN_CHG_DATA 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_FKC_INSTPLN_CHG_DATA 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_FKC_INSTPLN_CHG_DATA INTO WA_FKC_INSTPLN_CHG_DATA.


*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 INST_PLN_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKC_INSTPLN_CHG_DATA-INST_PLN_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKC_INSTPLN_CHG_DATA-INST_PLN_DOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EMGPA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FKC_INSTPLN_CHG_DATA-EMGPA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FKC_INSTPLN_CHG_DATA-EMGPA.
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_FKC_INSTPLN_CHG_DATA_STR, 
INST_PLN_DOC TYPE STRING,
OPUPK TYPE STRING,
OPTXT TYPE STRING,
FAEDN TYPE STRING,
STUDT TYPE STRING,
XMANL TYPE STRING,
BETRW TYPE STRING,
PYMET TYPE STRING,
AUGRS TYPE STRING,
EMBVT TYPE STRING,
EMCRD TYPE STRING,
EMGPA TYPE STRING,
MNDID TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKC_INSTPLN_CHG_DATA_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_FKC_INSTPLN_CHG_DATA_STR-INST_PLN_DOC sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-OPUPK sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-OPTXT sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-FAEDN sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-STUDT sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-XMANL sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-BETRW sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-PYMET sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-AUGRS sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-EMBVT sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-EMCRD sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-EMGPA sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-MNDID sy-vline 
WA_FKC_INSTPLN_CHG_DATA_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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