ABAP Select data from SAP table V_T334B into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T334B 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_T334B. 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_T334B 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_T334B TYPE STANDARD TABLE OF V_T334B,
      WA_V_T334B TYPE V_T334B,
      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_T334B> TYPE V_T334B.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T334B.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T334B
  INTO TABLE IT_V_T334B.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T334B
*  INTO TABLE @DATA(IT_V_T334B2).
*--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_T334B INDEX 1 INTO DATA(WA_V_T334B2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T334B ASSIGNING <V_T334B>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T334B>-MANDT = 1.
<V_T334B>-LGNUM = 1.
<V_T334B>-LGTYP = 1.
<V_T334B>-LGBKZ = 1.
<V_T334B>-LAGKL = 1.

ENDLOOP.

LOOP AT IT_V_T334B INTO WA_V_T334B.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T334B-WGFKL, sy-vline,
  WA_V_T334B-LGBE0, sy-vline,
  WA_V_T334B-LGBE1, sy-vline,
  WA_V_T334B-LGBE2, sy-vline,
  WA_V_T334B-LGBE3, sy-vline,
  WA_V_T334B-LGBE4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T334B 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_T334B 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_T334B INTO WA_V_T334B.


*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_T334B_STR, 
MANDT TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGBKZ TYPE STRING,
LAGKL TYPE STRING,
WGFKL TYPE STRING,
LGBE0 TYPE STRING,
LGBE1 TYPE STRING,
LGBE2 TYPE STRING,
LGBE3 TYPE STRING,
LGBE4 TYPE STRING,
LGBE5 TYPE STRING,
LGBE6 TYPE STRING,
LGBE7 TYPE STRING,
LGBE8 TYPE STRING,
LGBE9 TYPE STRING,
LGB10 TYPE STRING,
LGB11 TYPE STRING,
LGB12 TYPE STRING,
LGB13 TYPE STRING,
LGB14 TYPE STRING,
LGB15 TYPE STRING,
LGB16 TYPE STRING,
LGB17 TYPE STRING,
LGB18 TYPE STRING,
LGB19 TYPE STRING,
LGB20 TYPE STRING,
LGB21 TYPE STRING,
LGB22 TYPE STRING,
LGB23 TYPE STRING,
LGB24 TYPE STRING,
LGB25 TYPE STRING,
LGB26 TYPE STRING,
LGB27 TYPE STRING,
LGB28 TYPE STRING,
LGB29 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T334B_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_T334B_STR-MANDT sy-vline 
WA_V_T334B_STR-LGNUM sy-vline 
WA_V_T334B_STR-LGTYP sy-vline 
WA_V_T334B_STR-LGBKZ sy-vline 
WA_V_T334B_STR-LAGKL sy-vline 
WA_V_T334B_STR-WGFKL sy-vline 
WA_V_T334B_STR-LGBE0 sy-vline 
WA_V_T334B_STR-LGBE1 sy-vline 
WA_V_T334B_STR-LGBE2 sy-vline 
WA_V_T334B_STR-LGBE3 sy-vline 
WA_V_T334B_STR-LGBE4 sy-vline 
WA_V_T334B_STR-LGBE5 sy-vline 
WA_V_T334B_STR-LGBE6 sy-vline 
WA_V_T334B_STR-LGBE7 sy-vline 
WA_V_T334B_STR-LGBE8 sy-vline 
WA_V_T334B_STR-LGBE9 sy-vline 
WA_V_T334B_STR-LGB10 sy-vline 
WA_V_T334B_STR-LGB11 sy-vline 
WA_V_T334B_STR-LGB12 sy-vline 
WA_V_T334B_STR-LGB13 sy-vline 
WA_V_T334B_STR-LGB14 sy-vline 
WA_V_T334B_STR-LGB15 sy-vline 
WA_V_T334B_STR-LGB16 sy-vline 
WA_V_T334B_STR-LGB17 sy-vline 
WA_V_T334B_STR-LGB18 sy-vline 
WA_V_T334B_STR-LGB19 sy-vline 
WA_V_T334B_STR-LGB20 sy-vline 
WA_V_T334B_STR-LGB21 sy-vline 
WA_V_T334B_STR-LGB22 sy-vline 
WA_V_T334B_STR-LGB23 sy-vline 
WA_V_T334B_STR-LGB24 sy-vline 
WA_V_T334B_STR-LGB25 sy-vline 
WA_V_T334B_STR-LGB26 sy-vline 
WA_V_T334B_STR-LGB27 sy-vline 
WA_V_T334B_STR-LGB28 sy-vline 
WA_V_T334B_STR-LGB29 sy-vline      INTO ld_text SEPARATED BY SPACE.

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