ABAP Select data from SAP table ENT7541 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT7541 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 ENT7541. 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 ENT7541 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_ENT7541 TYPE STANDARD TABLE OF ENT7541,
      WA_ENT7541 TYPE ENT7541,
      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: <ENT7541> TYPE ENT7541.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT7541.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT7541
  INTO TABLE IT_ENT7541.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT7541
*  INTO TABLE @DATA(IT_ENT75412).
*--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_ENT7541 INDEX 1 INTO DATA(WA_ENT75412).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT7541 ASSIGNING <ENT7541>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT7541>-MANDT = 1.
<ENT7541>-EINRI = 1.
<ENT7541>-FALNR = 1.
<ENT7541>-LFDNR = 1.
<ENT7541>-BEWTY = 1.

ENDLOOP.

LOOP AT IT_ENT7541 INTO WA_ENT7541.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT7541-BWART, sy-vline,
  WA_ENT7541-BWIDT, sy-vline,
  WA_ENT7541-BWIZT, sy-vline,
  WA_ENT7541-PLANB, sy-vline,
  WA_ENT7541-BWPDT, sy-vline,
  WA_ENT7541-BWPZT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT7541 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_ENT7541 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_ENT7541 INTO WA_ENT7541.


*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 EINRI
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT7541-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT7541-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT7541-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT7541-FALNR.
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_ENT7541_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
FALNR TYPE STRING,
LFDNR TYPE STRING,
BEWTY TYPE STRING,
BWART TYPE STRING,
BWIDT TYPE STRING,
BWIZT TYPE STRING,
PLANB TYPE STRING,
BWPDT TYPE STRING,
BWPZT TYPE STRING,
BWEDT TYPE STRING,
BWEZT TYPE STRING,
PLANE TYPE STRING,
LFDREF TYPE STRING,
KZTXT TYPE STRING,
LGTXT TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
ABWGN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT7541_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_ENT7541_STR-MANDT sy-vline 
WA_ENT7541_STR-EINRI sy-vline 
WA_ENT7541_STR-FALNR sy-vline 
WA_ENT7541_STR-LFDNR sy-vline 
WA_ENT7541_STR-BEWTY sy-vline 
WA_ENT7541_STR-BWART sy-vline 
WA_ENT7541_STR-BWIDT sy-vline 
WA_ENT7541_STR-BWIZT sy-vline 
WA_ENT7541_STR-PLANB sy-vline 
WA_ENT7541_STR-BWPDT sy-vline 
WA_ENT7541_STR-BWPZT sy-vline 
WA_ENT7541_STR-BWEDT sy-vline 
WA_ENT7541_STR-BWEZT sy-vline 
WA_ENT7541_STR-PLANE sy-vline 
WA_ENT7541_STR-LFDREF sy-vline 
WA_ENT7541_STR-KZTXT sy-vline 
WA_ENT7541_STR-LGTXT sy-vline 
WA_ENT7541_STR-ERDAT sy-vline 
WA_ENT7541_STR-ERUSR sy-vline 
WA_ENT7541_STR-UPDAT sy-vline 
WA_ENT7541_STR-UPUSR sy-vline 
WA_ENT7541_STR-STORN sy-vline 
WA_ENT7541_STR-STUSR sy-vline 
WA_ENT7541_STR-STDAT sy-vline 
WA_ENT7541_STR-ABWGN sy-vline      INTO ld_text SEPARATED BY SPACE.

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