ABAP Select data from SAP table E2OILST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E2OILST 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 E2OILST. 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 E2OILST 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_E2OILST TYPE STANDARD TABLE OF E2OILST,
      WA_E2OILST TYPE E2OILST,
      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: <E2OILST> TYPE E2OILST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E2OILST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E2OILST
  INTO TABLE IT_E2OILST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E2OILST
*  INTO TABLE @DATA(IT_E2OILST2).
*--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_E2OILST INDEX 1 INTO DATA(WA_E2OILST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E2OILST ASSIGNING <E2OILST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E2OILST>-TSNUM = 1.
<E2OILST>-TSTYP = 1.
<E2OILST>-TSRFO = 1.
<E2OILST>-VEH_NR = 1.
<E2OILST>-ELUPD = 1.

ENDLOOP.

LOOP AT IT_E2OILST INTO WA_E2OILST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E2OILST-ROUTE, sy-vline,
  WA_E2OILST-VSART, sy-vline,
  WA_E2OILST-LAUFK, sy-vline,
  WA_E2OILST-ADRNA, sy-vline,
  WA_E2OILST-KNOTA, sy-vline,
  WA_E2OILST-VSTEL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E2OILST 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_E2OILST 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_E2OILST INTO WA_E2OILST.


*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 ADRNA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2OILST-ADRNA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2OILST-ADRNA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2OILST-KUNNA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2OILST-KUNNA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNA
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2OILST-LIFNA
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2OILST-LIFNA.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2OILST-ADRNZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2OILST-ADRNZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNNZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2OILST-KUNNZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2OILST-KUNNZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LIFNZ
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2OILST-LIFNZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2OILST-LIFNZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field TDLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_E2OILST-TDLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E2OILST-TDLNR.
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_E2OILST_STR, 
TSNUM TYPE STRING,
TSTYP TYPE STRING,
TSRFO TYPE STRING,
VEH_NR TYPE STRING,
ELUPD TYPE STRING,
ROUTE TYPE STRING,
VSART TYPE STRING,
LAUFK TYPE STRING,
ADRNA TYPE STRING,
KNOTA TYPE STRING,
VSTEL TYPE STRING,
LSTEL TYPE STRING,
WERKA TYPE STRING,
LGORTA TYPE STRING,
KUNNA TYPE STRING,
LIFNA TYPE STRING,
ADRNZ TYPE STRING,
KNOTZ TYPE STRING,
VSTEZ TYPE STRING,
LSTEZ TYPE STRING,
WERKZ TYPE STRING,
LGORTZ TYPE STRING,
KUNNZ TYPE STRING,
LIFNZ TYPE STRING,
TDLNR TYPE STRING,
DISTZ TYPE STRING,
MEDST TYPE STRING,
OIG_GESZTD TYPE STRING,
OIG_FAHZTD TYPE STRING,
MEIZT TYPE STRING,
ADRKNZA TYPE STRING,
KUNABLA TYPE STRING,
ADRKNZZ TYPE STRING,
KUNABLZ TYPE STRING,
FRKRL TYPE STRING,
SKALSM TYPE STRING,
FBSTA TYPE STRING,
ARSTA TYPE STRING,
VEH_IND TYPE STRING,
CARR_ROUT TYPE STRING,
TSTYP_TXT TYPE STRING,
DEPFLAG TYPE STRING,
DESTFLAG TYPE STRING,
FRKRLFLAG TYPE STRING,
DESCNODEA TYPE STRING,
DESCNODEZ TYPE STRING,
UPDATEFLAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E2OILST_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_E2OILST_STR-TSNUM sy-vline 
WA_E2OILST_STR-TSTYP sy-vline 
WA_E2OILST_STR-TSRFO sy-vline 
WA_E2OILST_STR-VEH_NR sy-vline 
WA_E2OILST_STR-ELUPD sy-vline 
WA_E2OILST_STR-ROUTE sy-vline 
WA_E2OILST_STR-VSART sy-vline 
WA_E2OILST_STR-LAUFK sy-vline 
WA_E2OILST_STR-ADRNA sy-vline 
WA_E2OILST_STR-KNOTA sy-vline 
WA_E2OILST_STR-VSTEL sy-vline 
WA_E2OILST_STR-LSTEL sy-vline 
WA_E2OILST_STR-WERKA sy-vline 
WA_E2OILST_STR-LGORTA sy-vline 
WA_E2OILST_STR-KUNNA sy-vline 
WA_E2OILST_STR-LIFNA sy-vline 
WA_E2OILST_STR-ADRNZ sy-vline 
WA_E2OILST_STR-KNOTZ sy-vline 
WA_E2OILST_STR-VSTEZ sy-vline 
WA_E2OILST_STR-LSTEZ sy-vline 
WA_E2OILST_STR-WERKZ sy-vline 
WA_E2OILST_STR-LGORTZ sy-vline 
WA_E2OILST_STR-KUNNZ sy-vline 
WA_E2OILST_STR-LIFNZ sy-vline 
WA_E2OILST_STR-TDLNR sy-vline 
WA_E2OILST_STR-DISTZ sy-vline 
WA_E2OILST_STR-MEDST sy-vline 
WA_E2OILST_STR-OIG_GESZTD sy-vline 
WA_E2OILST_STR-OIG_FAHZTD sy-vline 
WA_E2OILST_STR-MEIZT sy-vline 
WA_E2OILST_STR-ADRKNZA sy-vline 
WA_E2OILST_STR-KUNABLA sy-vline 
WA_E2OILST_STR-ADRKNZZ sy-vline 
WA_E2OILST_STR-KUNABLZ sy-vline 
WA_E2OILST_STR-FRKRL sy-vline 
WA_E2OILST_STR-SKALSM sy-vline 
WA_E2OILST_STR-FBSTA sy-vline 
WA_E2OILST_STR-ARSTA sy-vline 
WA_E2OILST_STR-VEH_IND sy-vline 
WA_E2OILST_STR-CARR_ROUT sy-vline 
WA_E2OILST_STR-TSTYP_TXT sy-vline 
WA_E2OILST_STR-DEPFLAG sy-vline 
WA_E2OILST_STR-DESTFLAG sy-vline 
WA_E2OILST_STR-FRKRLFLAG sy-vline 
WA_E2OILST_STR-DESCNODEA sy-vline 
WA_E2OILST_STR-DESCNODEZ sy-vline 
WA_E2OILST_STR-UPDATEFLAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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