ABAP Select data from SAP table ENT7579 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ENT7579 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 ENT7579. 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 ENT7579 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_ENT7579 TYPE STANDARD TABLE OF ENT7579,
      WA_ENT7579 TYPE ENT7579,
      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: <ENT7579> TYPE ENT7579.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ENT7579.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ENT7579
  INTO TABLE IT_ENT7579.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ENT7579
*  INTO TABLE @DATA(IT_ENT75792).
*--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_ENT7579 INDEX 1 INTO DATA(WA_ENT75792).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ENT7579 ASSIGNING <ENT7579>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ENT7579>-MANDT = 1.
<ENT7579>-EINRI = 1.
<ENT7579>-FALNR = 1.
<ENT7579>-LFDNR = 1.
<ENT7579>-LFDBEW = 1.

ENDLOOP.

LOOP AT IT_ENT7579 INTO WA_ENT7579.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ENT7579-BELNR, sy-vline,
  WA_ENT7579-DKAT1, sy-vline,
  WA_ENT7579-DKEY1, sy-vline,
  WA_ENT7579-DKAT2, sy-vline,
  WA_ENT7579-DKEY2, sy-vline,
  WA_ENT7579-DKAT_REF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ENT7579 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_ENT7579 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_ENT7579 INTO WA_ENT7579.


*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_ENT7579-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT7579-EINRI.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FALNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT7579-FALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT7579-FALNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT7579-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT7579-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DIAPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ENT7579-DIAPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ENT7579-DIAPE.
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_ENT7579_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
FALNR TYPE STRING,
LFDNR TYPE STRING,
LFDBEW TYPE STRING,
BELNR TYPE STRING,
DKAT1 TYPE STRING,
DKEY1 TYPE STRING,
DKAT2 TYPE STRING,
DKEY2 TYPE STRING,
DKAT_REF TYPE STRING,
DKEY_REF TYPE STRING,
DITXT TYPE STRING,
DILTX TYPE STRING,
DIADT TYPE STRING,
DIAZT TYPE STRING,
DIAPE TYPE STRING,
SPERR TYPE STRING,
KZTXT TYPE STRING,
LGTXT TYPE STRING,
DIASI TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
ERUSR TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
STORN TYPE STRING,
STUSR TYPE STRING,
STDAT TYPE STRING,
ANZOP TYPE STRING,
BHDIA TYPE STRING,
ENDIA TYPE STRING,
FHDIA TYPE STRING,
AFDIA TYPE STRING,
KHDIA TYPE STRING,
OPDIA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ENT7579_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_ENT7579_STR-MANDT sy-vline 
WA_ENT7579_STR-EINRI sy-vline 
WA_ENT7579_STR-FALNR sy-vline 
WA_ENT7579_STR-LFDNR sy-vline 
WA_ENT7579_STR-LFDBEW sy-vline 
WA_ENT7579_STR-BELNR sy-vline 
WA_ENT7579_STR-DKAT1 sy-vline 
WA_ENT7579_STR-DKEY1 sy-vline 
WA_ENT7579_STR-DKAT2 sy-vline 
WA_ENT7579_STR-DKEY2 sy-vline 
WA_ENT7579_STR-DKAT_REF sy-vline 
WA_ENT7579_STR-DKEY_REF sy-vline 
WA_ENT7579_STR-DITXT sy-vline 
WA_ENT7579_STR-DILTX sy-vline 
WA_ENT7579_STR-DIADT sy-vline 
WA_ENT7579_STR-DIAZT sy-vline 
WA_ENT7579_STR-DIAPE sy-vline 
WA_ENT7579_STR-SPERR sy-vline 
WA_ENT7579_STR-KZTXT sy-vline 
WA_ENT7579_STR-LGTXT sy-vline 
WA_ENT7579_STR-DIASI sy-vline 
WA_ENT7579_STR-ERDAT sy-vline 
WA_ENT7579_STR-ERTIM sy-vline 
WA_ENT7579_STR-ERUSR sy-vline 
WA_ENT7579_STR-UPDAT sy-vline 
WA_ENT7579_STR-UPUSR sy-vline 
WA_ENT7579_STR-STORN sy-vline 
WA_ENT7579_STR-STUSR sy-vline 
WA_ENT7579_STR-STDAT sy-vline 
WA_ENT7579_STR-ANZOP sy-vline 
WA_ENT7579_STR-BHDIA sy-vline 
WA_ENT7579_STR-ENDIA sy-vline 
WA_ENT7579_STR-FHDIA sy-vline 
WA_ENT7579_STR-AFDIA sy-vline 
WA_ENT7579_STR-KHDIA sy-vline 
WA_ENT7579_STR-OPDIA sy-vline      INTO ld_text SEPARATED BY SPACE.

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