ABAP Select data from SAP table VISETS_CN_ALV into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VISETS_CN_ALV
*  INTO TABLE @DATA(IT_VISETS_CN_ALV2).
*--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_VISETS_CN_ALV INDEX 1 INTO DATA(WA_VISETS_CN_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VISETS_CN_ALV>-OBART = 1.
<VISETS_CN_ALV>-OBJID = 1.
<VISETS_CN_ALV>-OBJTXT = 1.
<VISETS_CN_ALV>-J_OBJNR = 1.
<VISETS_CN_ALV>-INTRENO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VISETS_CN_ALV-RECNTYPE, sy-vline,
  WA_VISETS_CN_ALV-BUKRS, sy-vline,
  WA_VISETS_CN_ALV-BUTXT, sy-vline,
  WA_VISETS_CN_ALV-RECNNR, sy-vline,
  WA_VISETS_CN_ALV-RECNTXT, sy-vline,
  WA_VISETS_CN_ALV-RECNDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VISETS_CN_ALV 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_VISETS_CN_ALV 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_VISETS_CN_ALV INTO WA_VISETS_CN_ALV.


*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 ALPHA, internal->external for field RECNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VISETS_CN_ALV-RECNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VISETS_CN_ALV-RECNNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNNRCOLLECT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VISETS_CN_ALV-RECNNRCOLLECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VISETS_CN_ALV-RECNNRCOLLECT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNTXTOLD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VISETS_CN_ALV-RECNTXTOLD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VISETS_CN_ALV-RECNTXTOLD.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNPRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VISETS_CN_ALV-RECNPRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VISETS_CN_ALV-RECNPRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR_LOG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VISETS_CN_ALV-PRCTR_LOG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VISETS_CN_ALV-PRCTR_LOG.
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_VISETS_CN_ALV_STR, 
OBART TYPE STRING,
OBJID TYPE STRING,
OBJTXT TYPE STRING,
J_OBJNR TYPE STRING,
INTRENO TYPE STRING,
RECNTYPE TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
RECNNR TYPE STRING,
RECNTXT TYPE STRING,
RECNDAT TYPE STRING,
RECNBUKRSCOLLECT TYPE STRING,
RECNNRCOLLECT TYPE STRING,
RECNTXTOLD TYPE STRING,
RECNTLAW TYPE STRING,
RECNMANDAT TYPE STRING,
RECNMANDATTYP TYPE STRING,
RECNADJT TYPE STRING,
RECNADJTTYPE TYPE STRING,
RECNADJTRUECK TYPE STRING,
RECNAUTHGR TYPE STRING,
RECNVATNROW TYPE STRING,
RECNBUKRSGKT TYPE STRING,
RECNKZEIGGKT TYPE STRING,
RECNFLESR TYPE STRING,
RECNESRNROW TYPE STRING,
RECNESRCUIDOW TYPE STRING,
RECNBUSAREA TYPE STRING,
GTEXT TYPE STRING,
GSBER_LOG TYPE STRING,
GTEXT_LOG TYPE STRING,
RECNPRCTR TYPE STRING,
KTEXT TYPE STRING,
PRCTR_LOG TYPE STRING,
KTEXT_LOG TYPE STRING,
KOKRS TYPE STRING,
BEZEI TYPE STRING,
WAERS TYPE STRING,
RECNTXJCD TYPE STRING,
TXJCD_LOG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VISETS_CN_ALV_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_VISETS_CN_ALV_STR-OBART sy-vline 
WA_VISETS_CN_ALV_STR-OBJID sy-vline 
WA_VISETS_CN_ALV_STR-OBJTXT sy-vline 
WA_VISETS_CN_ALV_STR-J_OBJNR sy-vline 
WA_VISETS_CN_ALV_STR-INTRENO sy-vline 
WA_VISETS_CN_ALV_STR-RECNTYPE sy-vline 
WA_VISETS_CN_ALV_STR-BUKRS sy-vline 
WA_VISETS_CN_ALV_STR-BUTXT sy-vline 
WA_VISETS_CN_ALV_STR-RECNNR sy-vline 
WA_VISETS_CN_ALV_STR-RECNTXT sy-vline 
WA_VISETS_CN_ALV_STR-RECNDAT sy-vline 
WA_VISETS_CN_ALV_STR-RECNBUKRSCOLLECT sy-vline 
WA_VISETS_CN_ALV_STR-RECNNRCOLLECT sy-vline 
WA_VISETS_CN_ALV_STR-RECNTXTOLD sy-vline 
WA_VISETS_CN_ALV_STR-RECNTLAW sy-vline 
WA_VISETS_CN_ALV_STR-RECNMANDAT sy-vline 
WA_VISETS_CN_ALV_STR-RECNMANDATTYP sy-vline 
WA_VISETS_CN_ALV_STR-RECNADJT sy-vline 
WA_VISETS_CN_ALV_STR-RECNADJTTYPE sy-vline 
WA_VISETS_CN_ALV_STR-RECNADJTRUECK sy-vline 
WA_VISETS_CN_ALV_STR-RECNAUTHGR sy-vline 
WA_VISETS_CN_ALV_STR-RECNVATNROW sy-vline 
WA_VISETS_CN_ALV_STR-RECNBUKRSGKT sy-vline 
WA_VISETS_CN_ALV_STR-RECNKZEIGGKT sy-vline 
WA_VISETS_CN_ALV_STR-RECNFLESR sy-vline 
WA_VISETS_CN_ALV_STR-RECNESRNROW sy-vline 
WA_VISETS_CN_ALV_STR-RECNESRCUIDOW sy-vline 
WA_VISETS_CN_ALV_STR-RECNBUSAREA sy-vline 
WA_VISETS_CN_ALV_STR-GTEXT sy-vline 
WA_VISETS_CN_ALV_STR-GSBER_LOG sy-vline 
WA_VISETS_CN_ALV_STR-GTEXT_LOG sy-vline 
WA_VISETS_CN_ALV_STR-RECNPRCTR sy-vline 
WA_VISETS_CN_ALV_STR-KTEXT sy-vline 
WA_VISETS_CN_ALV_STR-PRCTR_LOG sy-vline 
WA_VISETS_CN_ALV_STR-KTEXT_LOG sy-vline 
WA_VISETS_CN_ALV_STR-KOKRS sy-vline 
WA_VISETS_CN_ALV_STR-BEZEI sy-vline 
WA_VISETS_CN_ALV_STR-WAERS sy-vline 
WA_VISETS_CN_ALV_STR-RECNTXJCD sy-vline 
WA_VISETS_CN_ALV_STR-TXJCD_LOG sy-vline      INTO ld_text SEPARATED BY SPACE.

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