ABAP Select data from SAP table ENT2042 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT2042 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 ENT2042. 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 ENT2042 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_ENT2042 TYPE STANDARD TABLE OF ENT2042,
      WA_ENT2042 TYPE ENT2042,
      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: <ENT2042> TYPE ENT2042.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT2042.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT2042
  INTO TABLE IT_ENT2042.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT2042
*  INTO TABLE @DATA(IT_ENT20422).
*--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_ENT2042 INDEX 1 INTO DATA(WA_ENT20422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT2042 ASSIGNING <ENT2042>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT2042>-MANDT = 1.
<ENT2042>-BUKRS = 1.
<ENT2042>-BELNR = 1.
<ENT2042>-GJAHR = 1.
<ENT2042>-BUZEI = 1.

ENDLOOP.

LOOP AT IT_ENT2042 INTO WA_ENT2042.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT2042-KOKRS, sy-vline,
  WA_ENT2042-KOSTL, sy-vline,
  WA_ENT2042-AUFNR, sy-vline,
  WA_ENT2042-VBELN, sy-vline,
  WA_ENT2042-VBEL2, sy-vline,
  WA_ENT2042-POSN2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT2042 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_ENT2042 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_ENT2042 INTO WA_ENT2042.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-AUFNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-VBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBEL2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-VBEL2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-VBEL2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-PRCTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VNAME
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-VNAME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-VNAME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-RECID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-RECID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EGRUP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-EGRUP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-EGRUP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VPTNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-VPTNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-VPTNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-IMKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field NPLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-NPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-NPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field PROJK
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-PROJK
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-PROJK.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-BTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-BTYPE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ETYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT2042-ETYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT2042-ETYPE.
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_ENT2042_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
KOKRS TYPE STRING,
KOSTL TYPE STRING,
AUFNR TYPE STRING,
VBELN TYPE STRING,
VBEL2 TYPE STRING,
POSN2 TYPE STRING,
ETEN2 TYPE STRING,
XSKST TYPE STRING,
XSAUF TYPE STRING,
XSPRO TYPE STRING,
XSERG TYPE STRING,
GVTYP TYPE STRING,
TBTKZ TYPE STRING,
PRCTR TYPE STRING,
VNAME TYPE STRING,
RECID TYPE STRING,
EGRUP TYPE STRING,
VPTNR TYPE STRING,
IMKEY TYPE STRING,
DABRZ TYPE STRING,
POPTS TYPE STRING,
KSTRG TYPE STRING,
NPLNR TYPE STRING,
AUFPL TYPE STRING,
APLZL TYPE STRING,
PROJK TYPE STRING,
PAOBJNR TYPE STRING,
PASUBNR TYPE STRING,
BTYPE TYPE STRING,
ETYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT2042_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_ENT2042_STR-MANDT sy-vline 
WA_ENT2042_STR-BUKRS sy-vline 
WA_ENT2042_STR-BELNR sy-vline 
WA_ENT2042_STR-GJAHR sy-vline 
WA_ENT2042_STR-BUZEI sy-vline 
WA_ENT2042_STR-KOKRS sy-vline 
WA_ENT2042_STR-KOSTL sy-vline 
WA_ENT2042_STR-AUFNR sy-vline 
WA_ENT2042_STR-VBELN sy-vline 
WA_ENT2042_STR-VBEL2 sy-vline 
WA_ENT2042_STR-POSN2 sy-vline 
WA_ENT2042_STR-ETEN2 sy-vline 
WA_ENT2042_STR-XSKST sy-vline 
WA_ENT2042_STR-XSAUF sy-vline 
WA_ENT2042_STR-XSPRO sy-vline 
WA_ENT2042_STR-XSERG sy-vline 
WA_ENT2042_STR-GVTYP sy-vline 
WA_ENT2042_STR-TBTKZ sy-vline 
WA_ENT2042_STR-PRCTR sy-vline 
WA_ENT2042_STR-VNAME sy-vline 
WA_ENT2042_STR-RECID sy-vline 
WA_ENT2042_STR-EGRUP sy-vline 
WA_ENT2042_STR-VPTNR sy-vline 
WA_ENT2042_STR-IMKEY sy-vline 
WA_ENT2042_STR-DABRZ sy-vline 
WA_ENT2042_STR-POPTS sy-vline 
WA_ENT2042_STR-KSTRG sy-vline 
WA_ENT2042_STR-NPLNR sy-vline 
WA_ENT2042_STR-AUFPL sy-vline 
WA_ENT2042_STR-APLZL sy-vline 
WA_ENT2042_STR-PROJK sy-vline 
WA_ENT2042_STR-PAOBJNR sy-vline 
WA_ENT2042_STR-PASUBNR sy-vline 
WA_ENT2042_STR-BTYPE sy-vline 
WA_ENT2042_STR-ETYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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