ABAP Select data from SAP table FMFG_VEKPODATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FMFG_VEKPODATA
*  INTO TABLE @DATA(IT_FMFG_VEKPODATA2).
*--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_FMFG_VEKPODATA INDEX 1 INTO DATA(WA_FMFG_VEKPODATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FMFG_VEKPODATA>-MENGE = 1.
<FMFG_VEKPODATA>-MEINS = 1.
<FMFG_VEKPODATA>-NETPR = 1.
<FMFG_VEKPODATA>-PEINH = 1.
<FMFG_VEKPODATA>-BPRME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FMFG_VEKPODATA-KNTTP, sy-vline,
  WA_FMFG_VEKPODATA-EVERS, sy-vline,
  WA_FMFG_VEKPODATA-PRDAT, sy-vline,
  WA_FMFG_VEKPODATA-BSGRU, sy-vline,
  WA_FMFG_VEKPODATA-LOEKZ, sy-vline,
  WA_FMFG_VEKPODATA-ELIKZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FMFG_VEKPODATA 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_FMFG_VEKPODATA 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_FMFG_VEKPODATA INTO WA_FMFG_VEKPODATA.


*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 CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FMFG_VEKPODATA-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMFG_VEKPODATA-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BPRME
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FMFG_VEKPODATA-BPRME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FMFG_VEKPODATA-BPRME.
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_FMFG_VEKPODATA_STR, 
MENGE TYPE STRING,
MEINS TYPE STRING,
NETPR TYPE STRING,
PEINH TYPE STRING,
BPRME TYPE STRING,
KNTTP TYPE STRING,
EVERS TYPE STRING,
PRDAT TYPE STRING,
BSGRU TYPE STRING,
LOEKZ TYPE STRING,
ELIKZ TYPE STRING,
EREKZ TYPE STRING,
WEPOS TYPE STRING,
WEUNB TYPE STRING,
REPOS TYPE STRING,
WEBRE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FMFG_VEKPODATA_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_FMFG_VEKPODATA_STR-MENGE sy-vline 
WA_FMFG_VEKPODATA_STR-MEINS sy-vline 
WA_FMFG_VEKPODATA_STR-NETPR sy-vline 
WA_FMFG_VEKPODATA_STR-PEINH sy-vline 
WA_FMFG_VEKPODATA_STR-BPRME sy-vline 
WA_FMFG_VEKPODATA_STR-KNTTP sy-vline 
WA_FMFG_VEKPODATA_STR-EVERS sy-vline 
WA_FMFG_VEKPODATA_STR-PRDAT sy-vline 
WA_FMFG_VEKPODATA_STR-BSGRU sy-vline 
WA_FMFG_VEKPODATA_STR-LOEKZ sy-vline 
WA_FMFG_VEKPODATA_STR-ELIKZ sy-vline 
WA_FMFG_VEKPODATA_STR-EREKZ sy-vline 
WA_FMFG_VEKPODATA_STR-WEPOS sy-vline 
WA_FMFG_VEKPODATA_STR-WEUNB sy-vline 
WA_FMFG_VEKPODATA_STR-REPOS sy-vline 
WA_FMFG_VEKPODATA_STR-WEBRE sy-vline      INTO ld_text SEPARATED BY SPACE.

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