ABAP Select data from SAP table VJHAPW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VJHAPW
*  INTO TABLE @DATA(IT_VJHAPW2).
*--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_VJHAPW INDEX 1 INTO DATA(WA_VJHAPW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VJHAPW>-MANDT = 1.
<VJHAPW>-AVM_NR = 1.
<VJHAPW>-POS_NR = 1.
<VJHAPW>-WS_ART = 1.
<VJHAPW>-XTECH_MIN1 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VJHAPW-XTECH_EE, sy-vline,
  WA_VJHAPW-MERKMAL0, sy-vline,
  WA_VJHAPW-MERKMAL1, sy-vline,
  WA_VJHAPW-MERKMAL2, sy-vline,
  WA_VJHAPW-MERKMAL3, sy-vline,
  WA_VJHAPW-MERKMAL4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VJHAPW 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_VJHAPW 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_VJHAPW INTO WA_VJHAPW.


*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_VJHAPW-AVM_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VJHAPW-AVM_NR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field INHK_KFM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VJHAPW-INHK_KFM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VJHAPW-INHK_KFM.
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_VJHAPW_STR, 
MANDT TYPE STRING,
AVM_NR TYPE STRING,
POS_NR TYPE STRING,
WS_ART TYPE STRING,
XTECH_MIN1 TYPE STRING,
XTECH_EE 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,
KONKAUS TYPE STRING,
KONKAUSKOM TYPE STRING,
INHK_KFM TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VJHAPW_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_VJHAPW_STR-MANDT sy-vline 
WA_VJHAPW_STR-AVM_NR sy-vline 
WA_VJHAPW_STR-POS_NR sy-vline 
WA_VJHAPW_STR-WS_ART sy-vline 
WA_VJHAPW_STR-XTECH_MIN1 sy-vline 
WA_VJHAPW_STR-XTECH_EE sy-vline 
WA_VJHAPW_STR-MERKMAL0 sy-vline 
WA_VJHAPW_STR-MERKMAL1 sy-vline 
WA_VJHAPW_STR-MERKMAL2 sy-vline 
WA_VJHAPW_STR-MERKMAL3 sy-vline 
WA_VJHAPW_STR-MERKMAL4 sy-vline 
WA_VJHAPW_STR-MERKMAL5 sy-vline 
WA_VJHAPW_STR-MERKMAL6 sy-vline 
WA_VJHAPW_STR-MERKMAL7 sy-vline 
WA_VJHAPW_STR-MERKMAL8 sy-vline 
WA_VJHAPW_STR-MERKMAL9 sy-vline 
WA_VJHAPW_STR-KONKAUS sy-vline 
WA_VJHAPW_STR-KONKAUSKOM sy-vline 
WA_VJHAPW_STR-INHK_KFM sy-vline 
WA_VJHAPW_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.