ABAP Select data from SAP table E1ACK3 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1ACK3 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 E1ACK3. 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 E1ACK3 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_E1ACK3 TYPE STANDARD TABLE OF E1ACK3,
      WA_E1ACK3 TYPE E1ACK3,
      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: <E1ACK3> TYPE E1ACK3.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1ACK3.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1ACK3
  INTO TABLE IT_E1ACK3.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1ACK3
*  INTO TABLE @DATA(IT_E1ACK32).
*--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_E1ACK3 INDEX 1 INTO DATA(WA_E1ACK32).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1ACK3 ASSIGNING <E1ACK3>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1ACK3>-SHKZG = 1.
<E1ACK3>-LIFNR = 1.
<E1ACK3>-NAME1 = 1.
<E1ACK3>-XREF1 = 1.
<E1ACK3>-XREF2 = 1.

ENDLOOP.

LOOP AT IT_E1ACK3 INTO WA_E1ACK3.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1ACK3-HKONT, sy-vline,
  WA_E1ACK3-ZTERM, sy-vline,
  WA_E1ACK3-ZFBDT, sy-vline,
  WA_E1ACK3-ZBD1T, sy-vline,
  WA_E1ACK3-ZBD2T, sy-vline,
  WA_E1ACK3-ZBD3T, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1ACK3 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_E1ACK3 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_E1ACK3 INTO WA_E1ACK3.


*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_E1ACK3_STR, 
SHKZG TYPE STRING,
LIFNR TYPE STRING,
NAME1 TYPE STRING,
XREF1 TYPE STRING,
XREF2 TYPE STRING,
HKONT TYPE STRING,
ZTERM TYPE STRING,
ZFBDT TYPE STRING,
ZBD1T TYPE STRING,
ZBD2T TYPE STRING,
ZBD3T TYPE STRING,
ZBD1P TYPE STRING,
ZBD2P TYPE STRING,
UZAWE TYPE STRING,
ZLSCH TYPE STRING,
ZLSPR TYPE STRING,
LZBKZ TYPE STRING,
LANDL TYPE STRING,
DIEKZ TYPE STRING,
ZUONR TYPE STRING,
SGTXT TYPE STRING,
ESRNR TYPE STRING,
ESRPZ TYPE STRING,
ESRRE TYPE STRING,
QSSKZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1ACK3_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_E1ACK3_STR-SHKZG sy-vline 
WA_E1ACK3_STR-LIFNR sy-vline 
WA_E1ACK3_STR-NAME1 sy-vline 
WA_E1ACK3_STR-XREF1 sy-vline 
WA_E1ACK3_STR-XREF2 sy-vline 
WA_E1ACK3_STR-HKONT sy-vline 
WA_E1ACK3_STR-ZTERM sy-vline 
WA_E1ACK3_STR-ZFBDT sy-vline 
WA_E1ACK3_STR-ZBD1T sy-vline 
WA_E1ACK3_STR-ZBD2T sy-vline 
WA_E1ACK3_STR-ZBD3T sy-vline 
WA_E1ACK3_STR-ZBD1P sy-vline 
WA_E1ACK3_STR-ZBD2P sy-vline 
WA_E1ACK3_STR-UZAWE sy-vline 
WA_E1ACK3_STR-ZLSCH sy-vline 
WA_E1ACK3_STR-ZLSPR sy-vline 
WA_E1ACK3_STR-LZBKZ sy-vline 
WA_E1ACK3_STR-LANDL sy-vline 
WA_E1ACK3_STR-DIEKZ sy-vline 
WA_E1ACK3_STR-ZUONR sy-vline 
WA_E1ACK3_STR-SGTXT sy-vline 
WA_E1ACK3_STR-ESRNR sy-vline 
WA_E1ACK3_STR-ESRPZ sy-vline 
WA_E1ACK3_STR-ESRRE sy-vline 
WA_E1ACK3_STR-QSSKZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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