ABAP Select data from SAP table KAEP_FNPL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KAEP_FNPL
*  INTO TABLE @DATA(IT_KAEP_FNPL2).
*--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_KAEP_FNPL INDEX 1 INTO DATA(WA_KAEP_FNPL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KAEP_FNPL>-MANDT = 1.
<KAEP_FNPL>-KOKRS = 1.
<KAEP_FNPL>-BELNR = 1.
<KAEP_FNPL>-BLDAT = 1.
<KAEP_FNPL>-KWAER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KAEP_FNPL-VERSN, sy-vline,
  WA_KAEP_FNPL-USNAM, sy-vline,
  WA_KAEP_FNPL-VRGNG, sy-vline,
  WA_KAEP_FNPL-BLTXT, sy-vline,
  WA_KAEP_FNPL-BUZEI, sy-vline,
  WA_KAEP_FNPL-TWAER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KAEP_FNPL 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_KAEP_FNPL 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_KAEP_FNPL INTO WA_KAEP_FNPL.


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

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-VERSN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field WRTTP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-WRTTP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-WRTTP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIS, internal->external for field FIPOS
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-FIPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-FIPOS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit OBART, internal->external for field OBART
CALL FUNCTION 'CONVERSION_EXIT_OBART_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-OBART
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-OBART.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-POSID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-PSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-PSPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-LIFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KAEP_FNPL-KUNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KAEP_FNPL-KUNNR.
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_KAEP_FNPL_STR, 
MANDT TYPE STRING,
KOKRS TYPE STRING,
BELNR TYPE STRING,
BLDAT TYPE STRING,
KWAER TYPE STRING,
VERSN TYPE STRING,
USNAM TYPE STRING,
VRGNG TYPE STRING,
BLTXT TYPE STRING,
BUZEI TYPE STRING,
TWAER TYPE STRING,
ZHLDT TYPE STRING,
PERIO TYPE STRING,
WRTTP TYPE STRING,
POSIT TYPE STRING,
FIPOS TYPE STRING,
OBJNR TYPE STRING,
OBJID TYPE STRING,
OBJ_TXT TYPE STRING,
OBART TYPE STRING,
OBJART_TXT TYPE STRING,
AUFNR TYPE STRING,
POSID TYPE STRING,
PSPID TYPE STRING,
WKGBTR TYPE STRING,
WTGBTR TYPE STRING,
WOGBTR TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
GSBER TYPE STRING,
BUKRS TYPE STRING,
SGTXT TYPE STRING,
BELTP TYPE STRING,
OWAER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KAEP_FNPL_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_KAEP_FNPL_STR-MANDT sy-vline 
WA_KAEP_FNPL_STR-KOKRS sy-vline 
WA_KAEP_FNPL_STR-BELNR sy-vline 
WA_KAEP_FNPL_STR-BLDAT sy-vline 
WA_KAEP_FNPL_STR-KWAER sy-vline 
WA_KAEP_FNPL_STR-VERSN sy-vline 
WA_KAEP_FNPL_STR-USNAM sy-vline 
WA_KAEP_FNPL_STR-VRGNG sy-vline 
WA_KAEP_FNPL_STR-BLTXT sy-vline 
WA_KAEP_FNPL_STR-BUZEI sy-vline 
WA_KAEP_FNPL_STR-TWAER sy-vline 
WA_KAEP_FNPL_STR-ZHLDT sy-vline 
WA_KAEP_FNPL_STR-PERIO sy-vline 
WA_KAEP_FNPL_STR-WRTTP sy-vline 
WA_KAEP_FNPL_STR-POSIT sy-vline 
WA_KAEP_FNPL_STR-FIPOS sy-vline 
WA_KAEP_FNPL_STR-OBJNR sy-vline 
WA_KAEP_FNPL_STR-OBJID sy-vline 
WA_KAEP_FNPL_STR-OBJ_TXT sy-vline 
WA_KAEP_FNPL_STR-OBART sy-vline 
WA_KAEP_FNPL_STR-OBJART_TXT sy-vline 
WA_KAEP_FNPL_STR-AUFNR sy-vline 
WA_KAEP_FNPL_STR-POSID sy-vline 
WA_KAEP_FNPL_STR-PSPID sy-vline 
WA_KAEP_FNPL_STR-WKGBTR sy-vline 
WA_KAEP_FNPL_STR-WTGBTR sy-vline 
WA_KAEP_FNPL_STR-WOGBTR sy-vline 
WA_KAEP_FNPL_STR-LIFNR sy-vline 
WA_KAEP_FNPL_STR-KUNNR sy-vline 
WA_KAEP_FNPL_STR-GSBER sy-vline 
WA_KAEP_FNPL_STR-BUKRS sy-vline 
WA_KAEP_FNPL_STR-SGTXT sy-vline 
WA_KAEP_FNPL_STR-BELTP sy-vline 
WA_KAEP_FNPL_STR-OWAER sy-vline      INTO ld_text SEPARATED BY SPACE.

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