ABAP Select data from SAP table PWBHKVVH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PWBHKVVH
*  INTO TABLE @DATA(IT_PWBHKVVH2).
*--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_PWBHKVVH INDEX 1 INTO DATA(WA_PWBHKVVH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PWBHKVVH>-MANDT = 1.
<PWBHKVVH>-TKONN = 1.
<PWBHKVVH>-TPOSN = 1.
<PWBHKVVH>-TKONN_EX = 1.
<PWBHKVVH>-TCTYP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PWBHKVVH-TKSACHB, sy-vline,
  WA_PWBHKVVH-KUNNR, sy-vline,
  WA_PWBHKVVH-ELIFN, sy-vline,
  WA_PWBHKVVH-VKORG, sy-vline,
  WA_PWBHKVVH-VTWEG, sy-vline,
  WA_PWBHKVVH-SPART, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PWBHKVVH 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_PWBHKVVH 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_PWBHKVVH INTO WA_PWBHKVVH.


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

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

*Conversion exit ALPHA, internal->external for field ELIFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PWBHKVVH-ELIFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PWBHKVVH-ELIFN.
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_PWBHKVVH_STR, 
MANDT TYPE STRING,
TKONN TYPE STRING,
TPOSN TYPE STRING,
TKONN_EX TYPE STRING,
TCTYP TYPE STRING,
TKSACHB TYPE STRING,
KUNNR TYPE STRING,
ELIFN TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
EKORG TYPE STRING,
EKGRP TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERZEIT TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
AEZEIT TYPE STRING,
TCCAT TYPE STRING,
USE_CASE TYPE STRING,
PURPOSE TYPE STRING,
COMPLETE TYPE STRING,
CUSTOMER_BEGRU TYPE STRING,
VENDOR_BEGRU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PWBHKVVH_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_PWBHKVVH_STR-MANDT sy-vline 
WA_PWBHKVVH_STR-TKONN sy-vline 
WA_PWBHKVVH_STR-TPOSN sy-vline 
WA_PWBHKVVH_STR-TKONN_EX sy-vline 
WA_PWBHKVVH_STR-TCTYP sy-vline 
WA_PWBHKVVH_STR-TKSACHB sy-vline 
WA_PWBHKVVH_STR-KUNNR sy-vline 
WA_PWBHKVVH_STR-ELIFN sy-vline 
WA_PWBHKVVH_STR-VKORG sy-vline 
WA_PWBHKVVH_STR-VTWEG sy-vline 
WA_PWBHKVVH_STR-SPART sy-vline 
WA_PWBHKVVH_STR-EKORG sy-vline 
WA_PWBHKVVH_STR-EKGRP sy-vline 
WA_PWBHKVVH_STR-ERNAM sy-vline 
WA_PWBHKVVH_STR-ERDAT sy-vline 
WA_PWBHKVVH_STR-ERZEIT sy-vline 
WA_PWBHKVVH_STR-AENAM sy-vline 
WA_PWBHKVVH_STR-AEDAT sy-vline 
WA_PWBHKVVH_STR-AEZEIT sy-vline 
WA_PWBHKVVH_STR-TCCAT sy-vline 
WA_PWBHKVVH_STR-USE_CASE sy-vline 
WA_PWBHKVVH_STR-PURPOSE sy-vline 
WA_PWBHKVVH_STR-COMPLETE sy-vline 
WA_PWBHKVVH_STR-CUSTOMER_BEGRU sy-vline 
WA_PWBHKVVH_STR-VENDOR_BEGRU sy-vline      INTO ld_text SEPARATED BY SPACE.

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