ABAP Select data from SAP table ENT3020 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT3020 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 ENT3020. 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 ENT3020 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_ENT3020 TYPE STANDARD TABLE OF ENT3020,
      WA_ENT3020 TYPE ENT3020,
      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: <ENT3020> TYPE ENT3020.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT3020.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT3020
  INTO TABLE IT_ENT3020.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT3020
*  INTO TABLE @DATA(IT_ENT30202).
*--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_ENT3020 INDEX 1 INTO DATA(WA_ENT30202).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT3020 ASSIGNING <ENT3020>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT3020>-MANDT = 1.
<ENT3020>-SPRAS = 1.
<ENT3020>-AFAPL = 1.
<ENT3020>-INVSL = 1.
<ENT3020>-INVETX = 1.

ENDLOOP.

LOOP AT IT_ENT3020 INTO WA_ENT3020.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT3020-ADATU, sy-vline,
  WA_ENT3020-BDATU, sy-vline,
  WA_ENT3020-FRIBEG, sy-vline,
  WA_ENT3020-BFRJAR, sy-vline,
  WA_ENT3020-BFRMON, sy-vline,
  WA_ENT3020-INVEINZ, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT3020 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_ENT3020 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_ENT3020 INTO WA_ENT3020.


*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 SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_ENT3020-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3020-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field MXBTRG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_ENT3020-MXBTRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3020-MXBTRG.
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_ENT3020_STR, 
MANDT TYPE STRING,
SPRAS TYPE STRING,
AFAPL TYPE STRING,
INVSL TYPE STRING,
INVETX TYPE STRING,
ADATU TYPE STRING,
BDATU TYPE STRING,
FRIBEG TYPE STRING,
BFRJAR TYPE STRING,
BFRMON TYPE STRING,
INVEINZ TYPE STRING,
MXPROZ TYPE STRING,
MXBTRG TYPE STRING,
IBWASL TYPE STRING,
IAFABE TYPE STRING,
EAFABE TYPE STRING,
XPROB TYPE STRING,
XIFBGJ TYPE STRING,
XINACH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT3020_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_ENT3020_STR-MANDT sy-vline 
WA_ENT3020_STR-SPRAS sy-vline 
WA_ENT3020_STR-AFAPL sy-vline 
WA_ENT3020_STR-INVSL sy-vline 
WA_ENT3020_STR-INVETX sy-vline 
WA_ENT3020_STR-ADATU sy-vline 
WA_ENT3020_STR-BDATU sy-vline 
WA_ENT3020_STR-FRIBEG sy-vline 
WA_ENT3020_STR-BFRJAR sy-vline 
WA_ENT3020_STR-BFRMON sy-vline 
WA_ENT3020_STR-INVEINZ sy-vline 
WA_ENT3020_STR-MXPROZ sy-vline 
WA_ENT3020_STR-MXBTRG sy-vline 
WA_ENT3020_STR-IBWASL sy-vline 
WA_ENT3020_STR-IAFABE sy-vline 
WA_ENT3020_STR-EAFABE sy-vline 
WA_ENT3020_STR-XPROB sy-vline 
WA_ENT3020_STR-XIFBGJ sy-vline 
WA_ENT3020_STR-XINACH sy-vline      INTO ld_text SEPARATED BY SPACE.

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