ABAP Select data from SAP table V_T312S2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_T312S2 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_T312S2. 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_T312S2 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_T312S2 TYPE STANDARD TABLE OF V_T312S2,
      WA_V_T312S2 TYPE V_T312S2,
      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_T312S2> TYPE V_T312S2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_T312S2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_T312S2
  INTO TABLE IT_V_T312S2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_T312S2
*  INTO TABLE @DATA(IT_V_T312S22).
*--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_T312S2 INDEX 1 INTO DATA(WA_V_T312S22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_T312S2 ASSIGNING <V_T312S2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_T312S2>-MANDT = 1.
<V_T312S2>-SORPO = 1.
<V_T312S2>-LGNUM = 1.
<V_T312S2>-SOKNZ = 1.
<V_T312S2>-SRT00 = 1.

ENDLOOP.

LOOP AT IT_V_T312S2 INTO WA_V_T312S2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_T312S2-SRT01, sy-vline,
  WA_V_T312S2-SRT02, sy-vline,
  WA_V_T312S2-SRT03, sy-vline,
  WA_V_T312S2-SRT04, sy-vline,
  WA_V_T312S2-SRT05, sy-vline,
  WA_V_T312S2-SRT06, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_T312S2 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_T312S2 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_T312S2 INTO WA_V_T312S2.


*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_T312S2_STR, 
MANDT TYPE STRING,
SORPO TYPE STRING,
LGNUM TYPE STRING,
SOKNZ TYPE STRING,
SRT00 TYPE STRING,
SRT01 TYPE STRING,
SRT02 TYPE STRING,
SRT03 TYPE STRING,
SRT04 TYPE STRING,
SRT05 TYPE STRING,
SRT06 TYPE STRING,
SRT07 TYPE STRING,
SRT08 TYPE STRING,
SRT09 TYPE STRING,
SRT10 TYPE STRING,
SRT11 TYPE STRING,
SRT12 TYPE STRING,
SRT13 TYPE STRING,
SRT14 TYPE STRING,
SRI00 TYPE STRING,
SRI01 TYPE STRING,
SRI02 TYPE STRING,
SRI03 TYPE STRING,
SRI04 TYPE STRING,
SRI05 TYPE STRING,
SRI06 TYPE STRING,
SRI07 TYPE STRING,
SRI08 TYPE STRING,
SRI09 TYPE STRING,
SRI10 TYPE STRING,
SRI11 TYPE STRING,
SRI12 TYPE STRING,
SRI13 TYPE STRING,
SRI14 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_T312S2_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_T312S2_STR-MANDT sy-vline 
WA_V_T312S2_STR-SORPO sy-vline 
WA_V_T312S2_STR-LGNUM sy-vline 
WA_V_T312S2_STR-SOKNZ sy-vline 
WA_V_T312S2_STR-SRT00 sy-vline 
WA_V_T312S2_STR-SRT01 sy-vline 
WA_V_T312S2_STR-SRT02 sy-vline 
WA_V_T312S2_STR-SRT03 sy-vline 
WA_V_T312S2_STR-SRT04 sy-vline 
WA_V_T312S2_STR-SRT05 sy-vline 
WA_V_T312S2_STR-SRT06 sy-vline 
WA_V_T312S2_STR-SRT07 sy-vline 
WA_V_T312S2_STR-SRT08 sy-vline 
WA_V_T312S2_STR-SRT09 sy-vline 
WA_V_T312S2_STR-SRT10 sy-vline 
WA_V_T312S2_STR-SRT11 sy-vline 
WA_V_T312S2_STR-SRT12 sy-vline 
WA_V_T312S2_STR-SRT13 sy-vline 
WA_V_T312S2_STR-SRT14 sy-vline 
WA_V_T312S2_STR-SRI00 sy-vline 
WA_V_T312S2_STR-SRI01 sy-vline 
WA_V_T312S2_STR-SRI02 sy-vline 
WA_V_T312S2_STR-SRI03 sy-vline 
WA_V_T312S2_STR-SRI04 sy-vline 
WA_V_T312S2_STR-SRI05 sy-vline 
WA_V_T312S2_STR-SRI06 sy-vline 
WA_V_T312S2_STR-SRI07 sy-vline 
WA_V_T312S2_STR-SRI08 sy-vline 
WA_V_T312S2_STR-SRI09 sy-vline 
WA_V_T312S2_STR-SRI10 sy-vline 
WA_V_T312S2_STR-SRI11 sy-vline 
WA_V_T312S2_STR-SRI12 sy-vline 
WA_V_T312S2_STR-SRI13 sy-vline 
WA_V_T312S2_STR-SRI14 sy-vline      INTO ld_text SEPARATED BY SPACE.

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