ABAP Select data from SAP table EDISEGMENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EDISEGMENT
*  INTO TABLE @DATA(IT_EDISEGMENT2).
*--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_EDISEGMENT INDEX 1 INTO DATA(WA_EDISEGMENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EDISEGMENT>-SEGTYP = 1.
<EDISEGMENT>-QUALIFIER = 1.
<EDISEGMENT>-GENERATED = 1.
<EDISEGMENT>-PRESP = 1.
<EDISEGMENT>-PWORK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EDISEGMENT-PLAST, sy-vline,
  WA_EDISEGMENT-CREDATE, sy-vline,
  WA_EDISEGMENT-CRETIME, sy-vline,
  WA_EDISEGMENT-LDATE, sy-vline,
  WA_EDISEGMENT-LTIME, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_EDISEGMENT 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_EDISEGMENT 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_EDISEGMENT INTO WA_EDISEGMENT.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_EDISEGMENT_STR, 
SEGTYP TYPE STRING,
QUALIFIER TYPE STRING,
GENERATED TYPE STRING,
PRESP TYPE STRING,
PWORK TYPE STRING,
PLAST TYPE STRING,
CREDATE TYPE STRING,
CRETIME TYPE STRING,
LDATE TYPE STRING,
LTIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EDISEGMENT_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_EDISEGMENT_STR-SEGTYP sy-vline 
WA_EDISEGMENT_STR-QUALIFIER sy-vline 
WA_EDISEGMENT_STR-GENERATED sy-vline 
WA_EDISEGMENT_STR-PRESP sy-vline 
WA_EDISEGMENT_STR-PWORK sy-vline 
WA_EDISEGMENT_STR-PLAST sy-vline 
WA_EDISEGMENT_STR-CREDATE sy-vline 
WA_EDISEGMENT_STR-CRETIME sy-vline 
WA_EDISEGMENT_STR-LDATE sy-vline 
WA_EDISEGMENT_STR-LTIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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