ABAP Select data from SAP table FWEL_DRV_KBLK_KBLP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FWEL_DRV_KBLK_KBLP
*  INTO TABLE @DATA(IT_FWEL_DRV_KBLK_KBLP2).
*--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_FWEL_DRV_KBLK_KBLP INDEX 1 INTO DATA(WA_FWEL_DRV_KBLK_KBLP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FWEL_DRV_KBLK_KBLP>-KVRGNG = 1.
<FWEL_DRV_KBLK_KBLP>-KAEDAT = 1.
<FWEL_DRV_KBLK_KBLP>-FIKRS = 1.
<FWEL_DRV_KBLK_KBLP>-BLDAT = 1.
<FWEL_DRV_KBLK_KBLP>-BLART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FWEL_DRV_KBLK_KBLP-BLTYP, sy-vline,
  WA_FWEL_DRV_KBLK_KBLP-BUDAT, sy-vline,
  WA_FWEL_DRV_KBLK_KBLP-KSTAR, sy-vline,
  WA_FWEL_DRV_KBLK_KBLP-FIPOS, sy-vline,
  WA_FWEL_DRV_KBLK_KBLP-AUFNR, sy-vline,
  WA_FWEL_DRV_KBLK_KBLP-KOSTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FWEL_DRV_KBLK_KBLP 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_FWEL_DRV_KBLK_KBLP 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_FWEL_DRV_KBLK_KBLP INTO WA_FWEL_DRV_KBLK_KBLP.


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

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

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

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

*Conversion exit ABPSP, internal->external for field PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_FWEL_DRV_KBLK_KBLP-PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FWEL_DRV_KBLK_KBLP-PSPNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field ERL_PSPNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_FWEL_DRV_KBLK_KBLP-ERL_PSPNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FWEL_DRV_KBLK_KBLP-ERL_PSPNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FWEL_DRV_KBLK_KBLP-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FWEL_DRV_KBLK_KBLP-GRANT_NBR.
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_FWEL_DRV_KBLK_KBLP_STR, 
KVRGNG TYPE STRING,
KAEDAT TYPE STRING,
FIKRS TYPE STRING,
BLDAT TYPE STRING,
BLART TYPE STRING,
BLTYP TYPE STRING,
BUDAT TYPE STRING,
KSTAR TYPE STRING,
FIPOS TYPE STRING,
AUFNR TYPE STRING,
KOSTL TYPE STRING,
PSPNR TYPE STRING,
FISTL TYPE STRING,
GEBER TYPE STRING,
ERL_PSPNR TYPE STRING,
SAKNR TYPE STRING,
GRANT_NBR TYPE STRING,
GSBER TYPE STRING,
MEASURE TYPE STRING,
BUDGET_PD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FWEL_DRV_KBLK_KBLP_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_FWEL_DRV_KBLK_KBLP_STR-KVRGNG sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-KAEDAT sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-FIKRS sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-BLDAT sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-BLART sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-BLTYP sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-BUDAT sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-KSTAR sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-FIPOS sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-AUFNR sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-KOSTL sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-PSPNR sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-FISTL sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-GEBER sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-ERL_PSPNR sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-SAKNR sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-GRANT_NBR sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-GSBER sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-MEASURE sy-vline 
WA_FWEL_DRV_KBLK_KBLP_STR-BUDGET_PD sy-vline      INTO ld_text SEPARATED BY SPACE.

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