ABAP Select data from SAP table V_ERDO into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_ERDO 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_ERDO. 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_ERDO 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_ERDO TYPE STANDARD TABLE OF V_ERDO,
      WA_V_ERDO TYPE V_ERDO,
      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_ERDO> TYPE V_ERDO.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_ERDO
*  INTO TABLE @DATA(IT_V_ERDO2).
*--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_ERDO INDEX 1 INTO DATA(WA_V_ERDO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_ERDO>-MANDT = 1.
<V_ERDO>-OPBEL = 1.
<V_ERDO>-OUTCNSO = 1.
<V_ERDO>-SIMULATED = 1.
<V_ERDO>-VKONT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_ERDO-PORTION, sy-vline,
  WA_V_ERDO-VALIDAT_IN, sy-vline,
  WA_V_ERDO-MANOUTS_IN, sy-vline,
  WA_V_ERDO-DEVIATION, sy-vline,
  WA_V_ERDO-FREI_AM, sy-vline,
  WA_V_ERDO-FREI_VON, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_ERDO 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_ERDO 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_ERDO INTO WA_V_ERDO.


*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 OPBEL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_ERDO-OPBEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_ERDO-OPBEL.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field ABWVK
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_ERDO-ABWVK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_ERDO-ABWVK.
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_ERDO_STR, 
MANDT TYPE STRING,
OPBEL TYPE STRING,
OUTCNSO TYPE STRING,
SIMULATED TYPE STRING,
VKONT TYPE STRING,
PORTION TYPE STRING,
VALIDAT_IN TYPE STRING,
MANOUTS_IN TYPE STRING,
DEVIATION TYPE STRING,
FREI_AM TYPE STRING,
FREI_VON TYPE STRING,
GPARTNER TYPE STRING,
STOKZ TYPE STRING,
TOTAL_AMNT TYPE STRING,
TOTAL_WAER TYPE STRING,
OUTCOUNT TYPE STRING,
OUTSORT_PR TYPE STRING,
OUTSORT_IN TYPE STRING,
BGRD_RELEASE TYPE STRING,
BLDAT TYPE STRING,
ABRVORG TYPE STRING,
ABWVK TYPE STRING,
FIKEY TYPE STRING,
COLOGRP_BP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_ERDO_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_ERDO_STR-MANDT sy-vline 
WA_V_ERDO_STR-OPBEL sy-vline 
WA_V_ERDO_STR-OUTCNSO sy-vline 
WA_V_ERDO_STR-SIMULATED sy-vline 
WA_V_ERDO_STR-VKONT sy-vline 
WA_V_ERDO_STR-PORTION sy-vline 
WA_V_ERDO_STR-VALIDAT_IN sy-vline 
WA_V_ERDO_STR-MANOUTS_IN sy-vline 
WA_V_ERDO_STR-DEVIATION sy-vline 
WA_V_ERDO_STR-FREI_AM sy-vline 
WA_V_ERDO_STR-FREI_VON sy-vline 
WA_V_ERDO_STR-GPARTNER sy-vline 
WA_V_ERDO_STR-STOKZ sy-vline 
WA_V_ERDO_STR-TOTAL_AMNT sy-vline 
WA_V_ERDO_STR-TOTAL_WAER sy-vline 
WA_V_ERDO_STR-OUTCOUNT sy-vline 
WA_V_ERDO_STR-OUTSORT_PR sy-vline 
WA_V_ERDO_STR-OUTSORT_IN sy-vline 
WA_V_ERDO_STR-BGRD_RELEASE sy-vline 
WA_V_ERDO_STR-BLDAT sy-vline 
WA_V_ERDO_STR-ABRVORG sy-vline 
WA_V_ERDO_STR-ABWVK sy-vline 
WA_V_ERDO_STR-FIKEY sy-vline 
WA_V_ERDO_STR-COLOGRP_BP sy-vline      INTO ld_text SEPARATED BY SPACE.

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