ABAP Select data from SAP table /SAPDII/DWB_API_VALI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPDII/DWB_API_VALI 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 /SAPDII/DWB_API_VALI. 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 /SAPDII/DWB_API_VALI 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_/SAPDII/DWB_API_VALI TYPE STANDARD TABLE OF /SAPDII/DWB_API_VALI,
      WA_/SAPDII/DWB_API_VALI TYPE /SAPDII/DWB_API_VALI,
      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: </SAPDII/DWB_API_VALI> TYPE /SAPDII/DWB_API_VALI.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPDII/DWB_API_VALI
  INTO TABLE IT_/SAPDII/DWB_API_VALI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPDII/DWB_API_VALI
*  INTO TABLE @DATA(IT_/SAPDII/DWB_API_VALI2).
*--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_/SAPDII/DWB_API_VALI INDEX 1 INTO DATA(WA_/SAPDII/DWB_API_VALI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPDII/DWB_API_VALI ASSIGNING </SAPDII/DWB_API_VALI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPDII/DWB_API_VALI>-ATINN = 1.
</SAPDII/DWB_API_VALI>-ATNAM = 1.
</SAPDII/DWB_API_VALI>-ATBEZ = 1.
</SAPDII/DWB_API_VALI>-ATZHL = 1.
</SAPDII/DWB_API_VALI>-ATWRT = 1.

ENDLOOP.

LOOP AT IT_/SAPDII/DWB_API_VALI INTO WA_/SAPDII/DWB_API_VALI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPDII/DWB_API_VALI-ATWTB, sy-vline,
  WA_/SAPDII/DWB_API_VALI-ATFLV, sy-vline,
  WA_/SAPDII/DWB_API_VALI-ATAWE, sy-vline,
  WA_/SAPDII/DWB_API_VALI-ATFLB, sy-vline,
  WA_/SAPDII/DWB_API_VALI-ATAW1, sy-vline,
  WA_/SAPDII/DWB_API_VALI-ATCOD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPDII/DWB_API_VALI 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_/SAPDII/DWB_API_VALI 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_/SAPDII/DWB_API_VALI INTO WA_/SAPDII/DWB_API_VALI.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/SAPDII/DWB_API_VALI_STR, 
ATINN TYPE STRING,
ATNAM TYPE STRING,
ATBEZ TYPE STRING,
ATZHL TYPE STRING,
ATWRT TYPE STRING,
ATWTB TYPE STRING,
ATFLV TYPE STRING,
ATAWE TYPE STRING,
ATFLB TYPE STRING,
ATAW1 TYPE STRING,
ATCOD TYPE STRING,
ATTLV TYPE STRING,
ATTLB TYPE STRING,
ATPRZ TYPE STRING,
ATINC TYPE STRING,
KNOBJ TYPE STRING,
DOKAR TYPE STRING,
DOKNR TYPE STRING,
DOKVR TYPE STRING,
DOKTL TYPE STRING,
ATWHI TYPE STRING,
ATZIS TYPE STRING,
SELECTEDFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPDII/DWB_API_VALI_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_/SAPDII/DWB_API_VALI_STR-ATINN sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATNAM sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATBEZ sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATZHL sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATWRT sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATWTB sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATFLV sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATAWE sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATFLB sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATAW1 sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATCOD sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATTLV sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATTLB sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATPRZ sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATINC sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-KNOBJ sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-DOKAR sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-DOKNR sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-DOKVR sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-DOKTL sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATWHI sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-ATZIS sy-vline 
WA_/SAPDII/DWB_API_VALI_STR-SELECTEDFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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