ABAP Select data from SAP table E2IDT01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2IDT01 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 E2IDT01. 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 E2IDT01 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_E2IDT01 TYPE STANDARD TABLE OF E2IDT01,
      WA_E2IDT01 TYPE E2IDT01,
      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: <E2IDT01> TYPE E2IDT01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2IDT01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2IDT01
  INTO TABLE IT_E2IDT01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2IDT01
*  INTO TABLE @DATA(IT_E2IDT012).
*--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_E2IDT01 INDEX 1 INTO DATA(WA_E2IDT012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2IDT01 ASSIGNING <E2IDT01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2IDT01>-TXTVW = 1.
<E2IDT01>-TXTSP = 1.
<E2IDT01>-TXTLF = 1.
<E2IDT01>-TXT01 = 1.
<E2IDT01>-TXT02 = 1.

ENDLOOP.

LOOP AT IT_E2IDT01 INTO WA_E2IDT01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2IDT01-TXT03, sy-vline,
  WA_E2IDT01-TXT04, sy-vline,
  WA_E2IDT01-TXT05, sy-vline,
  WA_E2IDT01-TXT06, sy-vline,
  WA_E2IDT01-TXT07, sy-vline,
  WA_E2IDT01-TXT08, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2IDT01 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_E2IDT01 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_E2IDT01 INTO WA_E2IDT01.


*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_E2IDT01_STR, 
TXTVW TYPE STRING,
TXTSP TYPE STRING,
TXTLF TYPE STRING,
TXT01 TYPE STRING,
TXT02 TYPE STRING,
TXT03 TYPE STRING,
TXT04 TYPE STRING,
TXT05 TYPE STRING,
TXT06 TYPE STRING,
TXT07 TYPE STRING,
TXT08 TYPE STRING,
TXT09 TYPE STRING,
TXT10 TYPE STRING,
TXT11 TYPE STRING,
TXT12 TYPE STRING,
TXT13 TYPE STRING,
TXT14 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2IDT01_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_E2IDT01_STR-TXTVW sy-vline 
WA_E2IDT01_STR-TXTSP sy-vline 
WA_E2IDT01_STR-TXTLF sy-vline 
WA_E2IDT01_STR-TXT01 sy-vline 
WA_E2IDT01_STR-TXT02 sy-vline 
WA_E2IDT01_STR-TXT03 sy-vline 
WA_E2IDT01_STR-TXT04 sy-vline 
WA_E2IDT01_STR-TXT05 sy-vline 
WA_E2IDT01_STR-TXT06 sy-vline 
WA_E2IDT01_STR-TXT07 sy-vline 
WA_E2IDT01_STR-TXT08 sy-vline 
WA_E2IDT01_STR-TXT09 sy-vline 
WA_E2IDT01_STR-TXT10 sy-vline 
WA_E2IDT01_STR-TXT11 sy-vline 
WA_E2IDT01_STR-TXT12 sy-vline 
WA_E2IDT01_STR-TXT13 sy-vline 
WA_E2IDT01_STR-TXT14 sy-vline      INTO ld_text SEPARATED BY SPACE.

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