ABAP Select data from SAP table VLCBUPA_CENTRAL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VLCBUPA_CENTRAL
*  INTO TABLE @DATA(IT_VLCBUPA_CENTRAL2).
*--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_VLCBUPA_CENTRAL INDEX 1 INTO DATA(WA_VLCBUPA_CENTRAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VLCBUPA_CENTRAL>-BPARTNER = 1.
<VLCBUPA_CENTRAL>-SEARCHTERM1 = 1.
<VLCBUPA_CENTRAL>-SEARCHTERM2 = 1.
<VLCBUPA_CENTRAL>-PARTNERTYPE = 1.
<VLCBUPA_CENTRAL>-AUTHORIZATIONGROUP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VLCBUPA_CENTRAL-PARTNERLANGUAGE, sy-vline,
  WA_VLCBUPA_CENTRAL-PARTNERLANGUAGEISO, sy-vline,
  WA_VLCBUPA_CENTRAL-DATAORIGINTYPE, sy-vline,
  WA_VLCBUPA_CENTRAL-CENTRALARCHIVINGFLAG, sy-vline,
  WA_VLCBUPA_CENTRAL-CENTRALBLOCK, sy-vline,
  WA_VLCBUPA_CENTRAL-TITLE_KEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VLCBUPA_CENTRAL 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_VLCBUPA_CENTRAL 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_VLCBUPA_CENTRAL INTO WA_VLCBUPA_CENTRAL.


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

*Conversion exit ISOLA, internal->external for field PARTNERLANGUAGE
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_VLCBUPA_CENTRAL-PARTNERLANGUAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VLCBUPA_CENTRAL-PARTNERLANGUAGE.
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_VLCBUPA_CENTRAL_STR, 
BPARTNER TYPE STRING,
SEARCHTERM1 TYPE STRING,
SEARCHTERM2 TYPE STRING,
PARTNERTYPE TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
PARTNERLANGUAGE TYPE STRING,
PARTNERLANGUAGEISO TYPE STRING,
DATAORIGINTYPE TYPE STRING,
CENTRALARCHIVINGFLAG TYPE STRING,
CENTRALBLOCK TYPE STRING,
TITLE_KEY TYPE STRING,
CONTACTALLOWANCE TYPE STRING,
PARTNEREXTERNAL TYPE STRING,
TITLELETTER TYPE STRING,
NOTRELEASED TYPE STRING,
COMM_TYPE TYPE STRING,
PRINT_MODE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VLCBUPA_CENTRAL_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_VLCBUPA_CENTRAL_STR-BPARTNER sy-vline 
WA_VLCBUPA_CENTRAL_STR-SEARCHTERM1 sy-vline 
WA_VLCBUPA_CENTRAL_STR-SEARCHTERM2 sy-vline 
WA_VLCBUPA_CENTRAL_STR-PARTNERTYPE sy-vline 
WA_VLCBUPA_CENTRAL_STR-AUTHORIZATIONGROUP sy-vline 
WA_VLCBUPA_CENTRAL_STR-PARTNERLANGUAGE sy-vline 
WA_VLCBUPA_CENTRAL_STR-PARTNERLANGUAGEISO sy-vline 
WA_VLCBUPA_CENTRAL_STR-DATAORIGINTYPE sy-vline 
WA_VLCBUPA_CENTRAL_STR-CENTRALARCHIVINGFLAG sy-vline 
WA_VLCBUPA_CENTRAL_STR-CENTRALBLOCK sy-vline 
WA_VLCBUPA_CENTRAL_STR-TITLE_KEY sy-vline 
WA_VLCBUPA_CENTRAL_STR-CONTACTALLOWANCE sy-vline 
WA_VLCBUPA_CENTRAL_STR-PARTNEREXTERNAL sy-vline 
WA_VLCBUPA_CENTRAL_STR-TITLELETTER sy-vline 
WA_VLCBUPA_CENTRAL_STR-NOTRELEASED sy-vline 
WA_VLCBUPA_CENTRAL_STR-COMM_TYPE sy-vline 
WA_VLCBUPA_CENTRAL_STR-PRINT_MODE sy-vline      INTO ld_text SEPARATED BY SPACE.

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