ABAP Select data from SAP table VJHAPP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VJHAPP
*  INTO TABLE @DATA(IT_VJHAPP2).
*--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_VJHAPP INDEX 1 INTO DATA(WA_VJHAPP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VJHAPP>-MANDT = 1.
<VJHAPP>-AVM_NR = 1.
<VJHAPP>-POS_NR = 1.
<VJHAPP>-PK_SERVICE_DATE = 1.
<VJHAPP>-START_DATE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VJHAPP-PRODH, sy-vline,
  WA_VJHAPP-STICHW, sy-vline,
  WA_VJHAPP-XUVPKEL_PREIS, sy-vline,
  WA_VJHAPP-MERKMAL0, sy-vline,
  WA_VJHAPP-MERKMAL1, sy-vline,
  WA_VJHAPP-MERKMAL2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VJHAPP 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_VJHAPP 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_VJHAPP INTO WA_VJHAPP.


*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 AVM_NR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VJHAPP-AVM_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VJHAPP-AVM_NR.
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_VJHAPP_STR, 
MANDT TYPE STRING,
AVM_NR TYPE STRING,
POS_NR TYPE STRING,
PK_SERVICE_DATE TYPE STRING,
START_DATE TYPE STRING,
PRODH TYPE STRING,
STICHW TYPE STRING,
XUVPKEL_PREIS TYPE STRING,
MERKMAL0 TYPE STRING,
MERKMAL1 TYPE STRING,
MERKMAL2 TYPE STRING,
MERKMAL3 TYPE STRING,
MERKMAL4 TYPE STRING,
MERKMAL5 TYPE STRING,
MERKMAL6 TYPE STRING,
MERKMAL7 TYPE STRING,
MERKMAL8 TYPE STRING,
MERKMAL9 TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VJHAPP_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_VJHAPP_STR-MANDT sy-vline 
WA_VJHAPP_STR-AVM_NR sy-vline 
WA_VJHAPP_STR-POS_NR sy-vline 
WA_VJHAPP_STR-PK_SERVICE_DATE sy-vline 
WA_VJHAPP_STR-START_DATE sy-vline 
WA_VJHAPP_STR-PRODH sy-vline 
WA_VJHAPP_STR-STICHW sy-vline 
WA_VJHAPP_STR-XUVPKEL_PREIS sy-vline 
WA_VJHAPP_STR-MERKMAL0 sy-vline 
WA_VJHAPP_STR-MERKMAL1 sy-vline 
WA_VJHAPP_STR-MERKMAL2 sy-vline 
WA_VJHAPP_STR-MERKMAL3 sy-vline 
WA_VJHAPP_STR-MERKMAL4 sy-vline 
WA_VJHAPP_STR-MERKMAL5 sy-vline 
WA_VJHAPP_STR-MERKMAL6 sy-vline 
WA_VJHAPP_STR-MERKMAL7 sy-vline 
WA_VJHAPP_STR-MERKMAL8 sy-vline 
WA_VJHAPP_STR-MERKMAL9 sy-vline 
WA_VJHAPP_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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