ABAP Select data from SAP table E1OIJTKTI_O1_2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1OIJTKTI_O1_2 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 E1OIJTKTI_O1_2. 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 E1OIJTKTI_O1_2 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_E1OIJTKTI_O1_2 TYPE STANDARD TABLE OF E1OIJTKTI_O1_2,
      WA_E1OIJTKTI_O1_2 TYPE E1OIJTKTI_O1_2,
      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: <E1OIJTKTI_O1_2> TYPE E1OIJTKTI_O1_2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1OIJTKTI_O1_2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1OIJTKTI_O1_2
  INTO TABLE IT_E1OIJTKTI_O1_2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1OIJTKTI_O1_2
*  INTO TABLE @DATA(IT_E1OIJTKTI_O1_22).
*--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_E1OIJTKTI_O1_2 INDEX 1 INTO DATA(WA_E1OIJTKTI_O1_22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1OIJTKTI_O1_2 ASSIGNING <E1OIJTKTI_O1_2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1OIJTKTI_O1_2>-C8H18RATIO = 1.
<E1OIJTKTI_O1_2>-C9H20RATIO = 1.
<E1OIJTKTI_O1_2>-C10H22RATIO = 1.
<E1OIJTKTI_O1_2>-HERATIO = 1.
<E1OIJTKTI_O1_2>-ARRATIO = 1.

ENDLOOP.

LOOP AT IT_E1OIJTKTI_O1_2 INTO WA_E1OIJTKTI_O1_2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1OIJTKTI_O1_2-GASCOMPRATEH, sy-vline,
  WA_E1OIJTKTI_O1_2-MOLDEN, sy-vline,
  WA_E1OIJTKTI_O1_2-MOLDENEH, sy-vline,
  WA_E1OIJTKTI_O1_2-MOLWEIGHT, sy-vline,
  WA_E1OIJTKTI_O1_2-HYDROCARBMOLFRAC, sy-vline,
  WA_E1OIJTKTI_O1_2-MOLWEIGHTEH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1OIJTKTI_O1_2 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_E1OIJTKTI_O1_2 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_E1OIJTKTI_O1_2 INTO WA_E1OIJTKTI_O1_2.


*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_E1OIJTKTI_O1_2_STR, 
C8H18RATIO TYPE STRING,
C9H20RATIO TYPE STRING,
C10H22RATIO TYPE STRING,
HERATIO TYPE STRING,
ARRATIO TYPE STRING,
GASCOMPRATEH TYPE STRING,
MOLDEN TYPE STRING,
MOLDENEH TYPE STRING,
MOLWEIGHT TYPE STRING,
HYDROCARBMOLFRAC TYPE STRING,
MOLWEIGHTEH TYPE STRING,
CUSTPARCHAR1 TYPE STRING,
CUSTPARFLOAT1 TYPE STRING,
CUSTEH1 TYPE STRING,
CUSTPARCHAR2 TYPE STRING,
CUSTPARFLOAT2 TYPE STRING,
CUSTEH2 TYPE STRING,
CUSTPARCHAR3 TYPE STRING,
CUSTPARFLOAT3 TYPE STRING,
CUSTEH3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1OIJTKTI_O1_2_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_E1OIJTKTI_O1_2_STR-C8H18RATIO sy-vline 
WA_E1OIJTKTI_O1_2_STR-C9H20RATIO sy-vline 
WA_E1OIJTKTI_O1_2_STR-C10H22RATIO sy-vline 
WA_E1OIJTKTI_O1_2_STR-HERATIO sy-vline 
WA_E1OIJTKTI_O1_2_STR-ARRATIO sy-vline 
WA_E1OIJTKTI_O1_2_STR-GASCOMPRATEH sy-vline 
WA_E1OIJTKTI_O1_2_STR-MOLDEN sy-vline 
WA_E1OIJTKTI_O1_2_STR-MOLDENEH sy-vline 
WA_E1OIJTKTI_O1_2_STR-MOLWEIGHT sy-vline 
WA_E1OIJTKTI_O1_2_STR-HYDROCARBMOLFRAC sy-vline 
WA_E1OIJTKTI_O1_2_STR-MOLWEIGHTEH sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTPARCHAR1 sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTPARFLOAT1 sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTEH1 sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTPARCHAR2 sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTPARFLOAT2 sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTEH2 sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTPARCHAR3 sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTPARFLOAT3 sy-vline 
WA_E1OIJTKTI_O1_2_STR-CUSTEH3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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