ABAP Select data from SAP table /SAPWF/FKK_INSTPLN_HEAD_FIEL00 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPWF/FKK_INSTPLN_HEAD_FIEL00 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 /SAPWF/FKK_INSTPLN_HEAD_FIEL00. 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 /SAPWF/FKK_INSTPLN_HEAD_FIEL00 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_/SAPWF/FKK_INSTPLN_HEAD_FIEL00 TYPE STANDARD TABLE OF /SAPWF/FKK_INSTPLN_HEAD_FIEL00,
      WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00 TYPE /SAPWF/FKK_INSTPLN_HEAD_FIEL00,
      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: </SAPWF/FKK_INSTPLN_HEAD_FIEL00> TYPE /SAPWF/FKK_INSTPLN_HEAD_FIEL00.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SAPWF/FKK_INSTPLN_HEAD_FIEL00.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPWF/FKK_INSTPLN_HEAD_FIEL00
  INTO TABLE IT_/SAPWF/FKK_INSTPLN_HEAD_FIEL00.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPWF/FKK_INSTPLN_HEAD_FIEL00
*  INTO TABLE @DATA(IT_/SAPWF/FKK_INSTPLN_HEAD_FIEL002).
*--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_/SAPWF/FKK_INSTPLN_HEAD_FIEL00 INDEX 1 INTO DATA(WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPWF/FKK_INSTPLN_HEAD_FIEL00 ASSIGNING </SAPWF/FKK_INSTPLN_HEAD_FIEL00>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPWF/FKK_INSTPLN_HEAD_FIEL00>-MANDT = 1.
</SAPWF/FKK_INSTPLN_HEAD_FIEL00>-RPNUM = 1.
</SAPWF/FKK_INSTPLN_HEAD_FIEL00>-RPRCI = 1.
</SAPWF/FKK_INSTPLN_HEAD_FIEL00>-RPRDA = 1.
</SAPWF/FKK_INSTPLN_HEAD_FIEL00>-RPCAT = 1.

ENDLOOP.

LOOP AT IT_/SAPWF/FKK_INSTPLN_HEAD_FIEL00 INTO WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00-DEADT, sy-vline,
  WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00-DEMAN, sy-vline,
  WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00-DEOFF, sy-vline,
  WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00-WAERS, sy-vline,
  WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00-DEAGD, sy-vline,
  WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00-STTDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00 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_/SAPWF/FKK_INSTPLN_HEAD_FIEL00 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_/SAPWF/FKK_INSTPLN_HEAD_FIEL00 INTO WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00.


*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_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR, 
MANDT TYPE STRING,
RPNUM TYPE STRING,
RPRCI TYPE STRING,
RPRDA TYPE STRING,
RPCAT TYPE STRING,
DEADT TYPE STRING,
DEMAN TYPE STRING,
DEOFF TYPE STRING,
WAERS TYPE STRING,
DEAGD TYPE STRING,
STTDT TYPE STRING,
ENDDT TYPE STRING,
NINST TYPE STRING,
VKONT TYPE STRING,
GPART TYPE STRING,
VTREF TYPE STRING,
DRCDT TYPE STRING,
BUKRS TYPE STRING,
DZINS TYPE STRING,
GZVER TYPE STRING,
FAEIN TYPE STRING,
DPUDT TYPE STRING,
DPUTM TYPE STRING,
C4EYE TYPE STRING,
C4EYP TYPE STRING,
SUBAP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_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_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-MANDT sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-RPNUM sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-RPRCI sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-RPRDA sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-RPCAT sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-DEADT sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-DEMAN sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-DEOFF sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-WAERS sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-DEAGD sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-STTDT sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-ENDDT sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-NINST sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-VKONT sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-GPART sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-VTREF sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-DRCDT sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-BUKRS sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-DZINS sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-GZVER sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-FAEIN sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-DPUDT sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-DPUTM sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-C4EYE sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-C4EYP sy-vline 
WA_/SAPWF/FKK_INSTPLN_HEAD_FIEL00_STR-SUBAP sy-vline      INTO ld_text SEPARATED BY SPACE.

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