ABAP Select data from SAP table V_T042 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T042 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 V_T042. 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 V_T042 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_V_T042 TYPE STANDARD TABLE OF V_T042,
      WA_V_T042 TYPE V_T042,
      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: <V_T042> TYPE V_T042.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T042.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T042
  INTO TABLE IT_V_T042.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T042
*  INTO TABLE @DATA(IT_V_T0422).
*--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_V_T042 INDEX 1 INTO DATA(WA_V_T0422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T042 ASSIGNING <V_T042>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T042>-MANDT = 1.
<V_T042>-BUKRS = 1.
<V_T042>-ZBUKR = 1.
<V_T042>-ULSK1 = 1.
<V_T042>-ULSK2 = 1.

ENDLOOP.

LOOP AT IT_V_T042 INTO WA_V_T042.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T042-ULSD1, sy-vline,
  WA_V_T042-ULSD2, sy-vline,
  WA_V_T042-XKDFB, sy-vline,
  WA_V_T042-XGBTR, sy-vline,
  WA_V_T042-TOLTG, sy-vline,
  WA_V_T042-SKTUG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T042 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_V_T042 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_V_T042 INTO WA_V_T042.


*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_V_T042_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
ZBUKR TYPE STRING,
ULSK1 TYPE STRING,
ULSK2 TYPE STRING,
ULSD1 TYPE STRING,
ULSD2 TYPE STRING,
XKDFB TYPE STRING,
XGBTR TYPE STRING,
TOLTG TYPE STRING,
SKTUG TYPE STRING,
XSKR1 TYPE STRING,
ABSBU TYPE STRING,
XUZAW TYPE STRING,
XBPTR TYPE STRING,
BUTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T042_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_V_T042_STR-MANDT sy-vline 
WA_V_T042_STR-BUKRS sy-vline 
WA_V_T042_STR-ZBUKR sy-vline 
WA_V_T042_STR-ULSK1 sy-vline 
WA_V_T042_STR-ULSK2 sy-vline 
WA_V_T042_STR-ULSD1 sy-vline 
WA_V_T042_STR-ULSD2 sy-vline 
WA_V_T042_STR-XKDFB sy-vline 
WA_V_T042_STR-XGBTR sy-vline 
WA_V_T042_STR-TOLTG sy-vline 
WA_V_T042_STR-SKTUG sy-vline 
WA_V_T042_STR-XSKR1 sy-vline 
WA_V_T042_STR-ABSBU sy-vline 
WA_V_T042_STR-XUZAW sy-vline 
WA_V_T042_STR-XBPTR sy-vline 
WA_V_T042_STR-BUTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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