ABAP Select data from SAP table E3KAKOIL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E3KAKOIL 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 E3KAKOIL. 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 E3KAKOIL 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_E3KAKOIL TYPE STANDARD TABLE OF E3KAKOIL,
      WA_E3KAKOIL TYPE E3KAKOIL,
      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: <E3KAKOIL> TYPE E3KAKOIL.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E3KAKOIL.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E3KAKOIL
  INTO TABLE IT_E3KAKOIL.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E3KAKOIL
*  INTO TABLE @DATA(IT_E3KAKOIL2).
*--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_E3KAKOIL INDEX 1 INTO DATA(WA_E3KAKOIL2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E3KAKOIL ASSIGNING <E3KAKOIL>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E3KAKOIL>-MSGFN = 1.
<E3KAKOIL>-KAPID = 1.
<E3KAKOIL>-AZNOR = 1.
<E3KAKOIL>-BEGZT = 1.
<E3KAKOIL>-ENDZT = 1.

ENDLOOP.

LOOP AT IT_E3KAKOIL INTO WA_E3KAKOIL.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E3KAKOIL-KALID, sy-vline,
  WA_E3KAKOIL-KAPAR, sy-vline,
  WA_E3KAKOIL-KAPAVO, sy-vline,
  WA_E3KAKOIL-KAPEH, sy-vline,
  WA_E3KAKOIL-KAPLPL, sy-vline,
  WA_E3KAKOIL-KAPTER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E3KAKOIL 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_E3KAKOIL 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_E3KAKOIL INTO WA_E3KAKOIL.


*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 CUNIT, internal->external for field KAPEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_E3KAKOIL-KAPEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KAKOIL-KAPEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_E3KAKOIL-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KAKOIL-MEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ANG_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_E3KAKOIL-ANG_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KAKOIL-ANG_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E3KAKOIL-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E3KAKOIL-EQUNR.
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_E3KAKOIL_STR, 
MSGFN TYPE STRING,
KAPID TYPE STRING,
AZNOR TYPE STRING,
BEGZT TYPE STRING,
ENDZT TYPE STRING,
KALID TYPE STRING,
KAPAR TYPE STRING,
KAPAVO TYPE STRING,
KAPEH TYPE STRING,
KAPLPL TYPE STRING,
KAPTER TYPE STRING,
MEINS TYPE STRING,
MOSID TYPE STRING,
NAME TYPE STRING,
NGRAD TYPE STRING,
PAUSE TYPE STRING,
PLANR TYPE STRING,
POOLK TYPE STRING,
UEBERLAST TYPE STRING,
VERSA TYPE STRING,
REFID TYPE STRING,
ANG_UNIT TYPE STRING,
ANG_MIN TYPE STRING,
ANG_MAX TYPE STRING,
KAPIE TYPE STRING,
EQUNR TYPE STRING,
RESTYPE1 TYPE STRING,
RESTYPE2 TYPE STRING,
RESTYPE3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E3KAKOIL_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_E3KAKOIL_STR-MSGFN sy-vline 
WA_E3KAKOIL_STR-KAPID sy-vline 
WA_E3KAKOIL_STR-AZNOR sy-vline 
WA_E3KAKOIL_STR-BEGZT sy-vline 
WA_E3KAKOIL_STR-ENDZT sy-vline 
WA_E3KAKOIL_STR-KALID sy-vline 
WA_E3KAKOIL_STR-KAPAR sy-vline 
WA_E3KAKOIL_STR-KAPAVO sy-vline 
WA_E3KAKOIL_STR-KAPEH sy-vline 
WA_E3KAKOIL_STR-KAPLPL sy-vline 
WA_E3KAKOIL_STR-KAPTER sy-vline 
WA_E3KAKOIL_STR-MEINS sy-vline 
WA_E3KAKOIL_STR-MOSID sy-vline 
WA_E3KAKOIL_STR-NAME sy-vline 
WA_E3KAKOIL_STR-NGRAD sy-vline 
WA_E3KAKOIL_STR-PAUSE sy-vline 
WA_E3KAKOIL_STR-PLANR sy-vline 
WA_E3KAKOIL_STR-POOLK sy-vline 
WA_E3KAKOIL_STR-UEBERLAST sy-vline 
WA_E3KAKOIL_STR-VERSA sy-vline 
WA_E3KAKOIL_STR-REFID sy-vline 
WA_E3KAKOIL_STR-ANG_UNIT sy-vline 
WA_E3KAKOIL_STR-ANG_MIN sy-vline 
WA_E3KAKOIL_STR-ANG_MAX sy-vline 
WA_E3KAKOIL_STR-KAPIE sy-vline 
WA_E3KAKOIL_STR-EQUNR sy-vline 
WA_E3KAKOIL_STR-RESTYPE1 sy-vline 
WA_E3KAKOIL_STR-RESTYPE2 sy-vline 
WA_E3KAKOIL_STR-RESTYPE3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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