ABAP Select data from SAP table V_LTR2_LNKROBANY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_LTR2_LNKROBANY 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_LTR2_LNKROBANY. 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_LTR2_LNKROBANY 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_LTR2_LNKROBANY TYPE STANDARD TABLE OF V_LTR2_LNKROBANY,
      WA_V_LTR2_LNKROBANY TYPE V_LTR2_LNKROBANY,
      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_LTR2_LNKROBANY> TYPE V_LTR2_LNKROBANY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_LTR2_LNKROBANY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_LTR2_LNKROBANY
  INTO TABLE IT_V_LTR2_LNKROBANY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_LTR2_LNKROBANY
*  INTO TABLE @DATA(IT_V_LTR2_LNKROBANY2).
*--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_LTR2_LNKROBANY INDEX 1 INTO DATA(WA_V_LTR2_LNKROBANY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_LTR2_LNKROBANY ASSIGNING <V_LTR2_LNKROBANY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_LTR2_LNKROBANY>-GUID = 1.
<V_LTR2_LNKROBANY>-SCENARIO = 1.
<V_LTR2_LNKROBANY>-ANY_TYPE = 1.
<V_LTR2_LNKROBANY>-NAMESPACE = 1.
<V_LTR2_LNKROBANY>-NAME = 1.

ENDLOOP.

LOOP AT IT_V_LTR2_LNKROBANY INTO WA_V_LTR2_LNKROBANY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_LTR2_LNKROBANY-SRC_BO_GUID, sy-vline,
  WA_V_LTR2_LNKROBANY-SRC_OD_DMOD_GUID, sy-vline,
  WA_V_LTR2_LNKROBANY-SRC_DMOD_CTX, sy-vline,
  WA_V_LTR2_LNKROBANY-SRC_TABID, sy-vline,
  WA_V_LTR2_LNKROBANY-TGT_OD_DMOD_GUID, sy-vline,
  WA_V_LTR2_LNKROBANY-TGT_DMOD_CTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_LTR2_LNKROBANY 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_LTR2_LNKROBANY 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_LTR2_LNKROBANY INTO WA_V_LTR2_LNKROBANY.


*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.

*Conversion exit ISOLA, internal->external for field MASTERLANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_V_LTR2_LNKROBANY-MASTERLANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_LTR2_LNKROBANY-MASTERLANGU.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_V_LTR2_LNKROBANY_STR, 
GUID TYPE STRING,
SCENARIO TYPE STRING,
ANY_TYPE TYPE STRING,
NAMESPACE TYPE STRING,
NAME TYPE STRING,
SRC_BO_GUID TYPE STRING,
SRC_OD_DMOD_GUID TYPE STRING,
SRC_DMOD_CTX TYPE STRING,
SRC_TABID TYPE STRING,
TGT_OD_DMOD_GUID TYPE STRING,
TGT_DMOD_CTX TYPE STRING,
TGT_TABID TYPE STRING,
SRC_CARDINALITY TYPE STRING,
TGT_CARDINALITY TYPE STRING,
CATEGORY TYPE STRING,
SRC_TABNAME TYPE STRING,
TGT_TABNAME TYPE STRING,
TYPE TYPE STRING,
OBJ_CONTEXT TYPE STRING,
APR_STATUS TYPE STRING,
COPY_SRC TYPE STRING,
UPL_USER TYPE STRING,
UPL_CLIENT TYPE STRING,
UPL_TIMESTMP TYPE STRING,
SNAPSHOT_ID TYPE STRING,
ANONYMOUS TYPE STRING,
DOCU_ID TYPE STRING,
DOCU_OBJ TYPE STRING,
MASTERLANGU TYPE STRING,
CR_USER TYPE STRING,
CR_TIMESTAMP TYPE STRING,
CH_USER TYPE STRING,
CH_TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_LTR2_LNKROBANY_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_LTR2_LNKROBANY_STR-GUID sy-vline 
WA_V_LTR2_LNKROBANY_STR-SCENARIO sy-vline 
WA_V_LTR2_LNKROBANY_STR-ANY_TYPE sy-vline 
WA_V_LTR2_LNKROBANY_STR-NAMESPACE sy-vline 
WA_V_LTR2_LNKROBANY_STR-NAME sy-vline 
WA_V_LTR2_LNKROBANY_STR-SRC_BO_GUID sy-vline 
WA_V_LTR2_LNKROBANY_STR-SRC_OD_DMOD_GUID sy-vline 
WA_V_LTR2_LNKROBANY_STR-SRC_DMOD_CTX sy-vline 
WA_V_LTR2_LNKROBANY_STR-SRC_TABID sy-vline 
WA_V_LTR2_LNKROBANY_STR-TGT_OD_DMOD_GUID sy-vline 
WA_V_LTR2_LNKROBANY_STR-TGT_DMOD_CTX sy-vline 
WA_V_LTR2_LNKROBANY_STR-TGT_TABID sy-vline 
WA_V_LTR2_LNKROBANY_STR-SRC_CARDINALITY sy-vline 
WA_V_LTR2_LNKROBANY_STR-TGT_CARDINALITY sy-vline 
WA_V_LTR2_LNKROBANY_STR-CATEGORY sy-vline 
WA_V_LTR2_LNKROBANY_STR-SRC_TABNAME sy-vline 
WA_V_LTR2_LNKROBANY_STR-TGT_TABNAME sy-vline 
WA_V_LTR2_LNKROBANY_STR-TYPE sy-vline 
WA_V_LTR2_LNKROBANY_STR-OBJ_CONTEXT sy-vline 
WA_V_LTR2_LNKROBANY_STR-APR_STATUS sy-vline 
WA_V_LTR2_LNKROBANY_STR-COPY_SRC sy-vline 
WA_V_LTR2_LNKROBANY_STR-UPL_USER sy-vline 
WA_V_LTR2_LNKROBANY_STR-UPL_CLIENT sy-vline 
WA_V_LTR2_LNKROBANY_STR-UPL_TIMESTMP sy-vline 
WA_V_LTR2_LNKROBANY_STR-SNAPSHOT_ID sy-vline 
WA_V_LTR2_LNKROBANY_STR-ANONYMOUS sy-vline 
WA_V_LTR2_LNKROBANY_STR-DOCU_ID sy-vline 
WA_V_LTR2_LNKROBANY_STR-DOCU_OBJ sy-vline 
WA_V_LTR2_LNKROBANY_STR-MASTERLANGU sy-vline 
WA_V_LTR2_LNKROBANY_STR-CR_USER sy-vline 
WA_V_LTR2_LNKROBANY_STR-CR_TIMESTAMP sy-vline 
WA_V_LTR2_LNKROBANY_STR-CH_USER sy-vline 
WA_V_LTR2_LNKROBANY_STR-CH_TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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