ABAP Select data from SAP table RFVI_WEGSALD_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RFVI_WEGSALD_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 RFVI_WEGSALD_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 RFVI_WEGSALD_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_RFVI_WEGSALD_ALV TYPE STANDARD TABLE OF RFVI_WEGSALD_ALV,
      WA_RFVI_WEGSALD_ALV TYPE RFVI_WEGSALD_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: <RFVI_WEGSALD_ALV> TYPE RFVI_WEGSALD_ALV.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RFVI_WEGSALD_ALV
*  INTO TABLE @DATA(IT_RFVI_WEGSALD_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_RFVI_WEGSALD_ALV INDEX 1 INTO DATA(WA_RFVI_WEGSALD_ALV2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RFVI_WEGSALD_ALV>-RACCT = 1.
<RFVI_WEGSALD_ALV>-RYEAR = 1.
<RFVI_WEGSALD_ALV>-RBUKRS = 1.
<RFVI_WEGSALD_ALV>-RMANDAT = 1.
<RFVI_WEGSALD_ALV>-TSLVT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RFVI_WEGSALD_ALV-TSL01, sy-vline,
  WA_RFVI_WEGSALD_ALV-TSL02, sy-vline,
  WA_RFVI_WEGSALD_ALV-TSL03, sy-vline,
  WA_RFVI_WEGSALD_ALV-TSL04, sy-vline,
  WA_RFVI_WEGSALD_ALV-TSL05, sy-vline,
  WA_RFVI_WEGSALD_ALV-TSL06, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RFVI_WEGSALD_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_RFVI_WEGSALD_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_RFVI_WEGSALD_ALV INTO WA_RFVI_WEGSALD_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 RACCT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RFVI_WEGSALD_ALV-RACCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVI_WEGSALD_ALV-RACCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_RFVI_WEGSALD_ALV-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RFVI_WEGSALD_ALV-RYEAR.
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_RFVI_WEGSALD_ALV_STR, 
RACCT TYPE STRING,
RYEAR TYPE STRING,
RBUKRS TYPE STRING,
RMANDAT TYPE STRING,
TSLVT TYPE STRING,
TSL01 TYPE STRING,
TSL02 TYPE STRING,
TSL03 TYPE STRING,
TSL04 TYPE STRING,
TSL05 TYPE STRING,
TSL06 TYPE STRING,
TSL07 TYPE STRING,
TSL08 TYPE STRING,
TSL09 TYPE STRING,
TSL10 TYPE STRING,
TSL11 TYPE STRING,
TSL12 TYPE STRING,
TSL13 TYPE STRING,
TSL14 TYPE STRING,
TSL15 TYPE STRING,
TSL16 TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RFVI_WEGSALD_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_RFVI_WEGSALD_ALV_STR-RACCT sy-vline 
WA_RFVI_WEGSALD_ALV_STR-RYEAR sy-vline 
WA_RFVI_WEGSALD_ALV_STR-RBUKRS sy-vline 
WA_RFVI_WEGSALD_ALV_STR-RMANDAT sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSLVT sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL01 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL02 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL03 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL04 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL05 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL06 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL07 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL08 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL09 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL10 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL11 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL12 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL13 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL14 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL15 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-TSL16 sy-vline 
WA_RFVI_WEGSALD_ALV_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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