ABAP Select data from SAP table T161V into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T161V 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 T161V. 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 T161V 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_T161V TYPE STANDARD TABLE OF T161V,
      WA_T161V TYPE T161V,
      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: <T161V> TYPE T161V.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T161V.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T161V
  INTO TABLE IT_T161V.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T161V
*  INTO TABLE @DATA(IT_T161V2).
*--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_T161V INDEX 1 INTO DATA(WA_T161V2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T161V ASSIGNING <T161V>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T161V>-MANDT = 1.
<T161V>-BSTYP = 1.
<T161V>-BSART = 1.
<T161V>-RESWK = 1.
<T161V>-LFART = 1.

ENDLOOP.

LOOP AT IT_T161V INTO WA_T161V.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T161V-PRREG, sy-vline,
  WA_T161V-LFRET, sy-vline,
  WA_T161V-LBLFA, sy-vline,
  WA_T161V-LFRFL, sy-vline,
  WA_T161V-MEVST, sy-vline,
  WA_T161V-MERFP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T161V 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_T161V 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_T161V INTO WA_T161V.


*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_T161V_STR, 
MANDT TYPE STRING,
BSTYP TYPE STRING,
BSART TYPE STRING,
RESWK TYPE STRING,
LFART TYPE STRING,
PRREG TYPE STRING,
LFRET TYPE STRING,
LBLFA TYPE STRING,
LFRFL TYPE STRING,
MEVST TYPE STRING,
MERFP TYPE STRING,
LFART1 TYPE STRING,
LFART2 TYPE STRING,
LFCON TYPE STRING,
REVFE TYPE STRING,
CRM_BILL TYPE STRING,
AUTO_DELV TYPE STRING,
REQPRF TYPE STRING,
FLS_LFART TYPE STRING,
ATPCONFMRP TYPE STRING,
STR_BOM_DELV TYPE STRING,
ACTIVATE_ADV_PAL_IND TYPE STRING,
ARTYP TYPE STRING,
IMMEDIATE_ORDER TYPE STRING,
SOREG TYPE STRING,
RELEASE_CHECK TYPE STRING,
RFM_VAS_PLANT_CHECK TYPE STRING,
GR_RELEASE_CHECK TYPE STRING,
BSGRU TYPE STRING,
ARUN_EVENT_WF TYPE STRING,
ARUN_EVENT_SIT TYPE STRING,
UNCONFIRMED_ITEMS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T161V_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_T161V_STR-MANDT sy-vline 
WA_T161V_STR-BSTYP sy-vline 
WA_T161V_STR-BSART sy-vline 
WA_T161V_STR-RESWK sy-vline 
WA_T161V_STR-LFART sy-vline 
WA_T161V_STR-PRREG sy-vline 
WA_T161V_STR-LFRET sy-vline 
WA_T161V_STR-LBLFA sy-vline 
WA_T161V_STR-LFRFL sy-vline 
WA_T161V_STR-MEVST sy-vline 
WA_T161V_STR-MERFP sy-vline 
WA_T161V_STR-LFART1 sy-vline 
WA_T161V_STR-LFART2 sy-vline 
WA_T161V_STR-LFCON sy-vline 
WA_T161V_STR-REVFE sy-vline 
WA_T161V_STR-CRM_BILL sy-vline 
WA_T161V_STR-AUTO_DELV sy-vline 
WA_T161V_STR-REQPRF sy-vline 
WA_T161V_STR-FLS_LFART sy-vline 
WA_T161V_STR-ATPCONFMRP sy-vline 
WA_T161V_STR-STR_BOM_DELV sy-vline 
WA_T161V_STR-ACTIVATE_ADV_PAL_IND sy-vline 
WA_T161V_STR-ARTYP sy-vline 
WA_T161V_STR-IMMEDIATE_ORDER sy-vline 
WA_T161V_STR-SOREG sy-vline 
WA_T161V_STR-RELEASE_CHECK sy-vline 
WA_T161V_STR-RFM_VAS_PLANT_CHECK sy-vline 
WA_T161V_STR-GR_RELEASE_CHECK sy-vline 
WA_T161V_STR-BSGRU sy-vline 
WA_T161V_STR-ARUN_EVENT_WF sy-vline 
WA_T161V_STR-ARUN_EVENT_SIT sy-vline 
WA_T161V_STR-UNCONFIRMED_ITEMS sy-vline      INTO ld_text SEPARATED BY SPACE.

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