ABAP Select data from SAP table /LTB/V_MC_WLI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /LTB/V_MC_WLI
*  INTO TABLE @DATA(IT_/LTB/V_MC_WLI2).
*--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_/LTB/V_MC_WLI INDEX 1 INTO DATA(WA_/LTB/V_MC_WLI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</LTB/V_MC_WLI>-MANDT = 1.
</LTB/V_MC_WLI>-WL_ITEM_ID = 1.
</LTB/V_MC_WLI>-WL1_ID = 1.
</LTB/V_MC_WLI>-BLOCK_RCV = 1.
</LTB/V_MC_WLI>-BLOCK_SND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/LTB/V_MC_WLI-GROUP_ID_RCV, sy-vline,
  WA_/LTB/V_MC_WLI-GROUP_ID_SND, sy-vline,
  WA_/LTB/V_MC_WLI-EXCLUDE_RCV, sy-vline,
  WA_/LTB/V_MC_WLI-EXCLUDE_SND, sy-vline,
  WA_/LTB/V_MC_WLI-NO_BATCH_RCV, sy-vline,
  WA_/LTB/V_MC_WLI-NO_BATCH_SND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/LTB/V_MC_WLI 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_/LTB/V_MC_WLI 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_/LTB/V_MC_WLI INTO WA_/LTB/V_MC_WLI.


*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_/LTB/V_MC_WLI_STR, 
MANDT TYPE STRING,
WL_ITEM_ID TYPE STRING,
WL1_ID TYPE STRING,
BLOCK_RCV TYPE STRING,
BLOCK_SND TYPE STRING,
GROUP_ID_RCV TYPE STRING,
GROUP_ID_SND TYPE STRING,
EXCLUDE_RCV TYPE STRING,
EXCLUDE_SND TYPE STRING,
NO_BATCH_RCV TYPE STRING,
NO_BATCH_SND TYPE STRING,
JOBNAME_RCV TYPE STRING,
JOBCOUNT_RCV TYPE STRING,
JOBNAME_SND TYPE STRING,
JOBCOUNT_SND TYPE STRING,
ABORTED_RCV TYPE STRING,
ABORTED_SND TYPE STRING,
TRANS_COUNT_SND TYPE STRING,
TRANS_COUNT_RCV TYPE STRING,
SKIPPED TYPE STRING,
RCV_EXE_ID TYPE STRING,
SND_EXE_ID TYPE STRING,
RCV_EXE_REQ TYPE STRING,
SND_EXE_REQ TYPE STRING,
STATUS_SND TYPE STRING,
STATUS_SND_T TYPE STRING,
STATUS_RCV TYPE STRING,
STATUS_RCV_T TYPE STRING,
STATUS_TEC_SND TYPE STRING,
STATUS_TEC_SND_T TYPE STRING,
STATUS_TEC_SND_L TYPE STRING,
STATUS_TEC_RCV TYPE STRING,
STATUS_TEC_RCV_T TYPE STRING,
STATUS_TEC_RCV_L TYPE STRING,
LOGNR_SND TYPE STRING,
LOGNR_RCV TYPE STRING,
EXE_STEP_SND TYPE STRING,
EXE_STEP_RCV TYPE STRING,
UNDO_TRFM_ID_SND TYPE STRING,
UNDO_TRFM_ID_RCV TYPE STRING,
MC_ACTION TYPE STRING,
MC_STATUS_ORIGINAL TYPE STRING,
MC_STATUS TYPE STRING,
STATUS_BU_ID TYPE STRING,
ID TYPE STRING,
SEVER_LEVEL TYPE STRING,
SEVER TYPE STRING,
OBJ_TYPE TYPE STRING,
STATUS_TYPE TYPE STRING,
DOKU_OBJ TYPE STRING,
ICON TYPE STRING,
TRFM_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/LTB/V_MC_WLI_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_/LTB/V_MC_WLI_STR-MANDT sy-vline 
WA_/LTB/V_MC_WLI_STR-WL_ITEM_ID sy-vline 
WA_/LTB/V_MC_WLI_STR-WL1_ID sy-vline 
WA_/LTB/V_MC_WLI_STR-BLOCK_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-BLOCK_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-GROUP_ID_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-GROUP_ID_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-EXCLUDE_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-EXCLUDE_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-NO_BATCH_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-NO_BATCH_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-JOBNAME_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-JOBCOUNT_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-JOBNAME_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-JOBCOUNT_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-ABORTED_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-ABORTED_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-TRANS_COUNT_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-TRANS_COUNT_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-SKIPPED sy-vline 
WA_/LTB/V_MC_WLI_STR-RCV_EXE_ID sy-vline 
WA_/LTB/V_MC_WLI_STR-SND_EXE_ID sy-vline 
WA_/LTB/V_MC_WLI_STR-RCV_EXE_REQ sy-vline 
WA_/LTB/V_MC_WLI_STR-SND_EXE_REQ sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_SND_T sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_RCV_T sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_TEC_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_TEC_SND_T sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_TEC_SND_L sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_TEC_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_TEC_RCV_T sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_TEC_RCV_L sy-vline 
WA_/LTB/V_MC_WLI_STR-LOGNR_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-LOGNR_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-EXE_STEP_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-EXE_STEP_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-UNDO_TRFM_ID_SND sy-vline 
WA_/LTB/V_MC_WLI_STR-UNDO_TRFM_ID_RCV sy-vline 
WA_/LTB/V_MC_WLI_STR-MC_ACTION sy-vline 
WA_/LTB/V_MC_WLI_STR-MC_STATUS_ORIGINAL sy-vline 
WA_/LTB/V_MC_WLI_STR-MC_STATUS sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_BU_ID sy-vline 
WA_/LTB/V_MC_WLI_STR-ID sy-vline 
WA_/LTB/V_MC_WLI_STR-SEVER_LEVEL sy-vline 
WA_/LTB/V_MC_WLI_STR-SEVER sy-vline 
WA_/LTB/V_MC_WLI_STR-OBJ_TYPE sy-vline 
WA_/LTB/V_MC_WLI_STR-STATUS_TYPE sy-vline 
WA_/LTB/V_MC_WLI_STR-DOKU_OBJ sy-vline 
WA_/LTB/V_MC_WLI_STR-ICON sy-vline 
WA_/LTB/V_MC_WLI_STR-TRFM_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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