ABAP Select data from SAP table ENT3028 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT3028 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 ENT3028. 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 ENT3028 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_ENT3028 TYPE STANDARD TABLE OF ENT3028,
      WA_ENT3028 TYPE ENT3028,
      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: <ENT3028> TYPE ENT3028.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT3028.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT3028
  INTO TABLE IT_ENT3028.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT3028
*  INTO TABLE @DATA(IT_ENT30282).
*--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_ENT3028 INDEX 1 INTO DATA(WA_ENT30282).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT3028 ASSIGNING <ENT3028>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT3028>-MANDT = 1.
<ENT3028>-BUKRS = 1.
<ENT3028>-ANLN1 = 1.
<ENT3028>-ANLN2 = 1.
<ENT3028>-BDATU = 1.

ENDLOOP.

LOOP AT IT_ENT3028 INTO WA_ENT3028.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT3028-ADATU, sy-vline,
  WA_ENT3028-KOSTL, sy-vline,
  WA_ENT3028-WERKS, sy-vline,
  WA_ENT3028-GSBER, sy-vline,
  WA_ENT3028-LSTAR, sy-vline,
  WA_ENT3028-STORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT3028 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_ENT3028 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_ENT3028 INTO WA_ENT3028.


*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 ANLN1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT3028-ANLN1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3028-ANLN1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLN2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT3028-ANLN2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3028-ANLN2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT3028-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3028-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CAUFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT3028-CAUFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3028-CAUFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field IAUFN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT3028-IAUFN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3028-IAUFN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field TPLNR
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_ENT3028-TPLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3028-TPLNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSP, internal->external for field IPSNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_ENT3028-IPSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT3028-IPSNR.
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_ENT3028_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
ANLN1 TYPE STRING,
ANLN2 TYPE STRING,
BDATU TYPE STRING,
ADATU TYPE STRING,
KOSTL TYPE STRING,
WERKS TYPE STRING,
GSBER TYPE STRING,
LSTAR TYPE STRING,
STORT TYPE STRING,
CAUFN TYPE STRING,
PLAN1 TYPE STRING,
RAUMN TYPE STRING,
IAUFN TYPE STRING,
IPROJ TYPE STRING,
TPLNR TYPE STRING,
ANUPD TYPE STRING,
TXJCD TYPE STRING,
IPSNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT3028_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_ENT3028_STR-MANDT sy-vline 
WA_ENT3028_STR-BUKRS sy-vline 
WA_ENT3028_STR-ANLN1 sy-vline 
WA_ENT3028_STR-ANLN2 sy-vline 
WA_ENT3028_STR-BDATU sy-vline 
WA_ENT3028_STR-ADATU sy-vline 
WA_ENT3028_STR-KOSTL sy-vline 
WA_ENT3028_STR-WERKS sy-vline 
WA_ENT3028_STR-GSBER sy-vline 
WA_ENT3028_STR-LSTAR sy-vline 
WA_ENT3028_STR-STORT sy-vline 
WA_ENT3028_STR-CAUFN sy-vline 
WA_ENT3028_STR-PLAN1 sy-vline 
WA_ENT3028_STR-RAUMN sy-vline 
WA_ENT3028_STR-IAUFN sy-vline 
WA_ENT3028_STR-IPROJ sy-vline 
WA_ENT3028_STR-TPLNR sy-vline 
WA_ENT3028_STR-ANUPD sy-vline 
WA_ENT3028_STR-TXJCD sy-vline 
WA_ENT3028_STR-IPSNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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