ABAP Select data from SAP table E1OIUWI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1OIUWI 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 E1OIUWI. 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 E1OIUWI 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_E1OIUWI TYPE STANDARD TABLE OF E1OIUWI,
      WA_E1OIUWI TYPE E1OIUWI,
      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: <E1OIUWI> TYPE E1OIUWI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1OIUWI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1OIUWI
  INTO TABLE IT_E1OIUWI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1OIUWI
*  INTO TABLE @DATA(IT_E1OIUWI2).
*--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_E1OIUWI INDEX 1 INTO DATA(WA_E1OIUWI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1OIUWI ASSIGNING <E1OIUWI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1OIUWI>-WCDVLH_NO = 1.
<E1OIUWI>-DOC_YEAR = 1.
<E1OIUWI>-WL_NO = 1.
<E1OIUWI>-WC_NO = 1.
<E1OIUWI>-DN_NO = 1.

ENDLOOP.

LOOP AT IT_E1OIUWI INTO WA_E1OIUWI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1OIUWI-EFF_FROM_DT, sy-vline,
  WA_E1OIUWI-EFF_TO_DT, sy-vline,
  WA_E1OIUWI-PRD_DT, sy-vline,
  WA_E1OIUWI-PRD_MATNR, sy-vline,
  WA_E1OIUWI-MATNR, sy-vline,
  WA_E1OIUWI-FREQ_CD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1OIUWI 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_E1OIUWI 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_E1OIUWI INTO WA_E1OIUWI.


*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_E1OIUWI_STR, 
WCDVLH_NO TYPE STRING,
DOC_YEAR TYPE STRING,
WL_NO TYPE STRING,
WC_NO TYPE STRING,
DN_NO TYPE STRING,
EFF_FROM_DT TYPE STRING,
EFF_TO_DT TYPE STRING,
PRD_DT TYPE STRING,
PRD_MATNR TYPE STRING,
MATNR TYPE STRING,
FREQ_CD TYPE STRING,
TKBTRY_MP_NO TYPE STRING,
VT_CD TYPE STRING,
VC_CD TYPE STRING,
VS_CD TYPE STRING,
TRNSP_NO TYPE STRING,
TRNSP_REF_NO TYPE STRING,
REC_TYPE_CD TYPE STRING,
DAYS_PROD TYPE STRING,
PRD_HRS TYPE STRING,
TKT_NO TYPE STRING,
TKT_TIMESTAMP TYPE STRING,
ORIG_MP_NO TYPE STRING,
ORIG_MP_DOC_NO TYPE STRING,
ORIG_MP_DOC_YEAR TYPE STRING,
THEO_U TYPE STRING,
THEO TYPE STRING,
CONV_GRP TYPE STRING,
STD_VOL_U TYPE STRING,
STD_VOL TYPE STRING,
ENERGY_U TYPE STRING,
ENERGY TYPE STRING,
HEAT_VAL_U TYPE STRING,
HEAT_VAL TYPE STRING,
BASE_DENSITY TYPE STRING,
BASE_DENSITY_U TYPE STRING,
DENTYP TYPE STRING,
MOL_VOLUME TYPE STRING,
INVT_DT TYPE STRING,
XREF_WL_NO TYPE STRING,
XREF_WC_NO TYPE STRING,
ORIG_NO TYPE STRING,
ORIG_DOC_YEAR TYPE STRING,
PRES_VALUE TYPE STRING,
PRES_UNIT TYPE STRING,
HVALUE_CLASS TYPE STRING,
XXDBACTION TYPE STRING,
OIU_CRUSER TYPE STRING,
OIU_DATUM TYPE STRING,
OIU_UZEIT TYPE STRING,
OIU_TIMESTAMP TYPE STRING,
PRD_MATNR_LONG TYPE STRING,
MATNR_LONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1OIUWI_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_E1OIUWI_STR-WCDVLH_NO sy-vline 
WA_E1OIUWI_STR-DOC_YEAR sy-vline 
WA_E1OIUWI_STR-WL_NO sy-vline 
WA_E1OIUWI_STR-WC_NO sy-vline 
WA_E1OIUWI_STR-DN_NO sy-vline 
WA_E1OIUWI_STR-EFF_FROM_DT sy-vline 
WA_E1OIUWI_STR-EFF_TO_DT sy-vline 
WA_E1OIUWI_STR-PRD_DT sy-vline 
WA_E1OIUWI_STR-PRD_MATNR sy-vline 
WA_E1OIUWI_STR-MATNR sy-vline 
WA_E1OIUWI_STR-FREQ_CD sy-vline 
WA_E1OIUWI_STR-TKBTRY_MP_NO sy-vline 
WA_E1OIUWI_STR-VT_CD sy-vline 
WA_E1OIUWI_STR-VC_CD sy-vline 
WA_E1OIUWI_STR-VS_CD sy-vline 
WA_E1OIUWI_STR-TRNSP_NO sy-vline 
WA_E1OIUWI_STR-TRNSP_REF_NO sy-vline 
WA_E1OIUWI_STR-REC_TYPE_CD sy-vline 
WA_E1OIUWI_STR-DAYS_PROD sy-vline 
WA_E1OIUWI_STR-PRD_HRS sy-vline 
WA_E1OIUWI_STR-TKT_NO sy-vline 
WA_E1OIUWI_STR-TKT_TIMESTAMP sy-vline 
WA_E1OIUWI_STR-ORIG_MP_NO sy-vline 
WA_E1OIUWI_STR-ORIG_MP_DOC_NO sy-vline 
WA_E1OIUWI_STR-ORIG_MP_DOC_YEAR sy-vline 
WA_E1OIUWI_STR-THEO_U sy-vline 
WA_E1OIUWI_STR-THEO sy-vline 
WA_E1OIUWI_STR-CONV_GRP sy-vline 
WA_E1OIUWI_STR-STD_VOL_U sy-vline 
WA_E1OIUWI_STR-STD_VOL sy-vline 
WA_E1OIUWI_STR-ENERGY_U sy-vline 
WA_E1OIUWI_STR-ENERGY sy-vline 
WA_E1OIUWI_STR-HEAT_VAL_U sy-vline 
WA_E1OIUWI_STR-HEAT_VAL sy-vline 
WA_E1OIUWI_STR-BASE_DENSITY sy-vline 
WA_E1OIUWI_STR-BASE_DENSITY_U sy-vline 
WA_E1OIUWI_STR-DENTYP sy-vline 
WA_E1OIUWI_STR-MOL_VOLUME sy-vline 
WA_E1OIUWI_STR-INVT_DT sy-vline 
WA_E1OIUWI_STR-XREF_WL_NO sy-vline 
WA_E1OIUWI_STR-XREF_WC_NO sy-vline 
WA_E1OIUWI_STR-ORIG_NO sy-vline 
WA_E1OIUWI_STR-ORIG_DOC_YEAR sy-vline 
WA_E1OIUWI_STR-PRES_VALUE sy-vline 
WA_E1OIUWI_STR-PRES_UNIT sy-vline 
WA_E1OIUWI_STR-HVALUE_CLASS sy-vline 
WA_E1OIUWI_STR-XXDBACTION sy-vline 
WA_E1OIUWI_STR-OIU_CRUSER sy-vline 
WA_E1OIUWI_STR-OIU_DATUM sy-vline 
WA_E1OIUWI_STR-OIU_UZEIT sy-vline 
WA_E1OIUWI_STR-OIU_TIMESTAMP sy-vline 
WA_E1OIUWI_STR-PRD_MATNR_LONG sy-vline 
WA_E1OIUWI_STR-MATNR_LONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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