ABAP Select data from SAP table OIU_ENP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM OIU_ENP
*  INTO TABLE @DATA(IT_OIU_ENP2).
*--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_OIU_ENP INDEX 1 INTO DATA(WA_OIU_ENP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<OIU_ENP>-OIU_WL_NO = 1.
<OIU_ENP>-OIU_WC_NO = 1.
<OIU_ENP>-OIU_DN_NO = 1.
<OIU_ENP>-OIU_MP_NO = 1.
<OIU_ENP>-OIU_RUN_TKT_NO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_OIU_ENP-OIU_MAJPD_CD, sy-vline,
  WA_OIU_ENP-OIU_A_H_VAL_FCT, sy-vline,
  WA_OIU_ENP-OIU_A_H_VAL_F_U, sy-vline,
  WA_OIU_ENP-OIU_GRV_AM, sy-vline,
  WA_OIU_ENP-OIU_DENSITY_U, sy-vline,
  WA_OIU_ENP-OIU_TRNSP_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_OIU_ENP 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_OIU_ENP 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_OIU_ENP INTO WA_OIU_ENP.


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

*Conversion exit ALPHA, internal->external for field OIU_WC_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_WC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_WC_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIU_DN_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_DN_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_DN_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIU_MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_MP_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field OIU_A_H_VAL_F_U
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_A_H_VAL_F_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_A_H_VAL_F_U.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field OIU_DENSITY_U
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_DENSITY_U
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_DENSITY_U.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIU_TRNSP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_TRNSP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_TRNSP_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIU_ORIG_MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_ORIG_MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_ORIG_MP_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIU_PR_WC_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_PR_WC_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_PR_WC_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIU_PR_MP_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_PR_MP_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_PR_MP_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIU_PR_WL_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_PR_WL_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_PR_WL_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field OIU_DOI_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_OIU_ENP-OIU_DOI_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_OIU_ENP-OIU_DOI_NO.
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_OIU_ENP_STR, 
OIU_WL_NO TYPE STRING,
OIU_WC_NO TYPE STRING,
OIU_DN_NO TYPE STRING,
OIU_MP_NO TYPE STRING,
OIU_RUN_TKT_NO TYPE STRING,
OIU_MAJPD_CD TYPE STRING,
OIU_A_H_VAL_FCT TYPE STRING,
OIU_A_H_VAL_F_U TYPE STRING,
OIU_GRV_AM TYPE STRING,
OIU_DENSITY_U TYPE STRING,
OIU_TRNSP_NO TYPE STRING,
OIU_TRNSP_REF_NO TYPE STRING,
OIU_SALE_DT_FROM TYPE STRING,
OIU_SALE_DT_TO TYPE STRING,
OIU_ORIG_MP_NO TYPE STRING,
OIU_PR_WC_NO TYPE STRING,
OIU_PR_MP_NO TYPE STRING,
OIU_PR_WL_NO TYPE STRING,
OIU_VNAME TYPE STRING,
OIU_FREQ_CD TYPE STRING,
OIU_DOI_NO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_OIU_ENP_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_OIU_ENP_STR-OIU_WL_NO sy-vline 
WA_OIU_ENP_STR-OIU_WC_NO sy-vline 
WA_OIU_ENP_STR-OIU_DN_NO sy-vline 
WA_OIU_ENP_STR-OIU_MP_NO sy-vline 
WA_OIU_ENP_STR-OIU_RUN_TKT_NO sy-vline 
WA_OIU_ENP_STR-OIU_MAJPD_CD sy-vline 
WA_OIU_ENP_STR-OIU_A_H_VAL_FCT sy-vline 
WA_OIU_ENP_STR-OIU_A_H_VAL_F_U sy-vline 
WA_OIU_ENP_STR-OIU_GRV_AM sy-vline 
WA_OIU_ENP_STR-OIU_DENSITY_U sy-vline 
WA_OIU_ENP_STR-OIU_TRNSP_NO sy-vline 
WA_OIU_ENP_STR-OIU_TRNSP_REF_NO sy-vline 
WA_OIU_ENP_STR-OIU_SALE_DT_FROM sy-vline 
WA_OIU_ENP_STR-OIU_SALE_DT_TO sy-vline 
WA_OIU_ENP_STR-OIU_ORIG_MP_NO sy-vline 
WA_OIU_ENP_STR-OIU_PR_WC_NO sy-vline 
WA_OIU_ENP_STR-OIU_PR_MP_NO sy-vline 
WA_OIU_ENP_STR-OIU_PR_WL_NO sy-vline 
WA_OIU_ENP_STR-OIU_VNAME sy-vline 
WA_OIU_ENP_STR-OIU_FREQ_CD sy-vline 
WA_OIU_ENP_STR-OIU_DOI_NO sy-vline      INTO ld_text SEPARATED BY SPACE.

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