ABAP Select data from SAP table EIEI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EIEI
*  INTO TABLE @DATA(IT_EIEI2).
*--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_EIEI INDEX 1 INTO DATA(WA_EIEI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EIEI>-MANDT = 1.
<EIEI>-EXNUM = 1.
<EIEI>-EXPOS = 1.
<EIEI>-AHBAS = 1.
<EIEI>-AHAPP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EIEI-KAPPL, sy-vline,
  WA_EIEI-KSCHL, sy-vline,
  WA_EIEI-DOKNU, sy-vline,
  WA_EIEI-REFNR, sy-vline,
  WA_EIEI-REFPS, sy-vline,
  WA_EIEI-NACAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EIEI 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_EIEI 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_EIEI INTO WA_EIEI.


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

*Conversion exit GJAHR, internal->external for field MABJJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_EIEI-MABJJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EIEI-MABJJ.
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_EIEI_STR, 
MANDT TYPE STRING,
EXNUM TYPE STRING,
EXPOS TYPE STRING,
AHBAS TYPE STRING,
AHAPP TYPE STRING,
KAPPL TYPE STRING,
KSCHL TYPE STRING,
DOKNU TYPE STRING,
REFNR TYPE STRING,
REFPS TYPE STRING,
NACAR TYPE STRING,
PREFA TYPE STRING,
VORPA TYPE STRING,
AHDMA TYPE STRING,
FTPTY TYPE STRING,
BEHOE TYPE STRING,
ERDAT TYPE STRING,
ERZET TYPE STRING,
ERNAM TYPE STRING,
MABJJ TYPE STRING,
MABMM TYPE STRING,
MABWR TYPE STRING,
MABNR TYPE STRING,
STADU TYPE STRING,
BEHO2 TYPE STRING,
STAZ1 TYPE STRING,
STAZ2 TYPE STRING,
TZON1 TYPE STRING,
TSTM1 TYPE STRING,
TZON2 TYPE STRING,
TSTM2 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EIEI_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_EIEI_STR-MANDT sy-vline 
WA_EIEI_STR-EXNUM sy-vline 
WA_EIEI_STR-EXPOS sy-vline 
WA_EIEI_STR-AHBAS sy-vline 
WA_EIEI_STR-AHAPP sy-vline 
WA_EIEI_STR-KAPPL sy-vline 
WA_EIEI_STR-KSCHL sy-vline 
WA_EIEI_STR-DOKNU sy-vline 
WA_EIEI_STR-REFNR sy-vline 
WA_EIEI_STR-REFPS sy-vline 
WA_EIEI_STR-NACAR sy-vline 
WA_EIEI_STR-PREFA sy-vline 
WA_EIEI_STR-VORPA sy-vline 
WA_EIEI_STR-AHDMA sy-vline 
WA_EIEI_STR-FTPTY sy-vline 
WA_EIEI_STR-BEHOE sy-vline 
WA_EIEI_STR-ERDAT sy-vline 
WA_EIEI_STR-ERZET sy-vline 
WA_EIEI_STR-ERNAM sy-vline 
WA_EIEI_STR-MABJJ sy-vline 
WA_EIEI_STR-MABMM sy-vline 
WA_EIEI_STR-MABWR sy-vline 
WA_EIEI_STR-MABNR sy-vline 
WA_EIEI_STR-STADU sy-vline 
WA_EIEI_STR-BEHO2 sy-vline 
WA_EIEI_STR-STAZ1 sy-vline 
WA_EIEI_STR-STAZ2 sy-vline 
WA_EIEI_STR-TZON1 sy-vline 
WA_EIEI_STR-TSTM1 sy-vline 
WA_EIEI_STR-TZON2 sy-vline 
WA_EIEI_STR-TSTM2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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