ABAP Select data from SAP table E1LTCOI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP E1LTCOI 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 E1LTCOI. 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 E1LTCOI 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_E1LTCOI TYPE STANDARD TABLE OF E1LTCOI,
      WA_E1LTCOI TYPE E1LTCOI,
      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: <E1LTCOI> TYPE E1LTCOI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_E1LTCOI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM E1LTCOI
  INTO TABLE IT_E1LTCOI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM E1LTCOI
*  INTO TABLE @DATA(IT_E1LTCOI2).
*--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_E1LTCOI INDEX 1 INTO DATA(WA_E1LTCOI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_E1LTCOI ASSIGNING <E1LTCOI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<E1LTCOI>-TAPOS = 1.
<E1LTCOI>-SQUIT = 1.
<E1LTCOI>-NISTA = 1.
<E1LTCOI>-NDIFA = 1.
<E1LTCOI>-RISTA = 1.

ENDLOOP.

LOOP AT IT_E1LTCOI INTO WA_E1LTCOI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_E1LTCOI-RDIFA, sy-vline,
  WA_E1LTCOI-KZNUL, sy-vline,
  WA_E1LTCOI-PISTA, sy-vline,
  WA_E1LTCOI-ALTME, sy-vline,
  WA_E1LTCOI-KZDIF, sy-vline,
  WA_E1LTCOI-LENUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_E1LTCOI 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_E1LTCOI 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_E1LTCOI INTO WA_E1LTCOI.


*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 LENUM, internal->external for field LENUM
CALL FUNCTION 'CONVERSION_EXIT_LENUM_OUTPUT'
  EXPORTING
    input =                      WA_E1LTCOI-LENUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_E1LTCOI-LENUM.
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_E1LTCOI_STR, 
TAPOS TYPE STRING,
SQUIT TYPE STRING,
NISTA TYPE STRING,
NDIFA TYPE STRING,
RISTA TYPE STRING,
RDIFA TYPE STRING,
KZNUL TYPE STRING,
PISTA TYPE STRING,
ALTME TYPE STRING,
KZDIF TYPE STRING,
LENUM TYPE STRING,
VQUIT TYPE STRING,
PICKM TYPE STRING,
DIFFM TYPE STRING,
RESTM TYPE STRING,
BQUIT TYPE STRING,
KZFOL TYPE STRING,
NLPLA TYPE STRING,
NPPOS TYPE STRING,
PAPOS TYPE STRING,
PARTI TYPE STRING,
CHARG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_E1LTCOI_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_E1LTCOI_STR-TAPOS sy-vline 
WA_E1LTCOI_STR-SQUIT sy-vline 
WA_E1LTCOI_STR-NISTA sy-vline 
WA_E1LTCOI_STR-NDIFA sy-vline 
WA_E1LTCOI_STR-RISTA sy-vline 
WA_E1LTCOI_STR-RDIFA sy-vline 
WA_E1LTCOI_STR-KZNUL sy-vline 
WA_E1LTCOI_STR-PISTA sy-vline 
WA_E1LTCOI_STR-ALTME sy-vline 
WA_E1LTCOI_STR-KZDIF sy-vline 
WA_E1LTCOI_STR-LENUM sy-vline 
WA_E1LTCOI_STR-VQUIT sy-vline 
WA_E1LTCOI_STR-PICKM sy-vline 
WA_E1LTCOI_STR-DIFFM sy-vline 
WA_E1LTCOI_STR-RESTM sy-vline 
WA_E1LTCOI_STR-BQUIT sy-vline 
WA_E1LTCOI_STR-KZFOL sy-vline 
WA_E1LTCOI_STR-NLPLA sy-vline 
WA_E1LTCOI_STR-NPPOS sy-vline 
WA_E1LTCOI_STR-PAPOS sy-vline 
WA_E1LTCOI_STR-PARTI sy-vline 
WA_E1LTCOI_STR-CHARG sy-vline      INTO ld_text SEPARATED BY SPACE.

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