ABAP Select data from SAP table /IAM/S_ESO_I_OREF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /IAM/S_ESO_I_OREF 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 /IAM/S_ESO_I_OREF. 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 /IAM/S_ESO_I_OREF 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_/IAM/S_ESO_I_OREF TYPE STANDARD TABLE OF /IAM/S_ESO_I_OREF,
      WA_/IAM/S_ESO_I_OREF TYPE /IAM/S_ESO_I_OREF,
      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: </IAM/S_ESO_I_OREF> TYPE /IAM/S_ESO_I_OREF.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /IAM/S_ESO_I_OREF
  INTO TABLE IT_/IAM/S_ESO_I_OREF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /IAM/S_ESO_I_OREF
*  INTO TABLE @DATA(IT_/IAM/S_ESO_I_OREF2).
*--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_/IAM/S_ESO_I_OREF INDEX 1 INTO DATA(WA_/IAM/S_ESO_I_OREF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/IAM/S_ESO_I_OREF ASSIGNING </IAM/S_ESO_I_OREF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</IAM/S_ESO_I_OREF>-DB_KEY = 1.
</IAM/S_ESO_I_OREF>-PARENT_KEY = 1.
</IAM/S_ESO_I_OREF>-DESC_LANGUAGE_CD = 1.
</IAM/S_ESO_I_OREF>-CATEGORY_CD = 1.
</IAM/S_ESO_I_OREF>-TYPE_CD = 1.

ENDLOOP.

LOOP AT IT_/IAM/S_ESO_I_OREF INTO WA_/IAM/S_ESO_I_OREF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/IAM/S_ESO_I_OREF-SUBTYPE_CD, sy-vline,
  WA_/IAM/S_ESO_I_OREF-ID, sy-vline,
  WA_/IAM/S_ESO_I_OREF-SRC_SYSTEM, sy-vline,
  WA_/IAM/S_ESO_I_OREF-MAIN_REF_IND, sy-vline,
  WA_/IAM/S_ESO_I_OREF-ADD_FIELD1, sy-vline,
  WA_/IAM/S_ESO_I_OREF-ADD_FIELD2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/IAM/S_ESO_I_OREF 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_/IAM/S_ESO_I_OREF 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_/IAM/S_ESO_I_OREF INTO WA_/IAM/S_ESO_I_OREF.


*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 ISOLA, internal->external for field DESC_LANGUAGE_CD
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/IAM/S_ESO_I_OREF-DESC_LANGUAGE_CD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/IAM/S_ESO_I_OREF-DESC_LANGUAGE_CD.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit TSTLC, internal->external for field CREATED_ON
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/IAM/S_ESO_I_OREF-CREATED_ON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/IAM/S_ESO_I_OREF-CREATED_ON.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTLC, internal->external for field CHANGED_ON
CALL FUNCTION 'CONVERSION_EXIT_TSTLC_OUTPUT'
  EXPORTING
    input =                      WA_/IAM/S_ESO_I_OREF-CHANGED_ON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/IAM/S_ESO_I_OREF-CHANGED_ON.
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_/IAM/S_ESO_I_OREF_STR, 
DB_KEY TYPE STRING,
PARENT_KEY TYPE STRING,
DESC_LANGUAGE_CD TYPE STRING,
CATEGORY_CD TYPE STRING,
TYPE_CD TYPE STRING,
SUBTYPE_CD TYPE STRING,
ID TYPE STRING,
SRC_SYSTEM TYPE STRING,
MAIN_REF_IND TYPE STRING,
ADD_FIELD1 TYPE STRING,
ADD_FIELD2 TYPE STRING,
ADD_FIELD3 TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_ON TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED_ON TYPE STRING,
TEXT TYPE STRING,
COMMENT_TXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/IAM/S_ESO_I_OREF_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_/IAM/S_ESO_I_OREF_STR-DB_KEY sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-PARENT_KEY sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-DESC_LANGUAGE_CD sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-CATEGORY_CD sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-TYPE_CD sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-SUBTYPE_CD sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-ID sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-SRC_SYSTEM sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-MAIN_REF_IND sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-ADD_FIELD1 sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-ADD_FIELD2 sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-ADD_FIELD3 sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-CREATED_BY sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-CREATED_ON sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-CHANGED_BY sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-CHANGED_ON sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-TEXT sy-vline 
WA_/IAM/S_ESO_I_OREF_STR-COMMENT_TXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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