ABAP Select data from SAP table EISU_IL_MD_INSTLN_ITEM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM EISU_IL_MD_INSTLN_ITEM
*  INTO TABLE @DATA(IT_EISU_IL_MD_INSTLN_ITEM2).
*--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_EISU_IL_MD_INSTLN_ITEM INDEX 1 INTO DATA(WA_EISU_IL_MD_INSTLN_ITEM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<EISU_IL_MD_INSTLN_ITEM>-ANLAGE = 1.
<EISU_IL_MD_INSTLN_ITEM>-BIS = 1.
<EISU_IL_MD_INSTLN_ITEM>-AB = 1.
<EISU_IL_MD_INSTLN_ITEM>-TARIFTYP = 1.
<EISU_IL_MD_INSTLN_ITEM>-ANLSTAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_EISU_IL_MD_INSTLN_ITEM-KONZBEFR, sy-vline,
  WA_EISU_IL_MD_INSTLN_ITEM-PAUSCHAL, sy-vline,
  WA_EISU_IL_MD_INSTLN_ITEM-BRANCHE, sy-vline,
  WA_EISU_IL_MD_INSTLN_ITEM-AKLASSE, sy-vline,
  WA_EISU_IL_MD_INSTLN_ITEM-ABLEINH, sy-vline,
  WA_EISU_IL_MD_INSTLN_ITEM-TEMP_AREA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_EISU_IL_MD_INSTLN_ITEM 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_EISU_IL_MD_INSTLN_ITEM 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_EISU_IL_MD_INSTLN_ITEM INTO WA_EISU_IL_MD_INSTLN_ITEM.


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

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

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

*Conversion exit ALPHA, internal->external for field HIGHLEVINST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_EISU_IL_MD_INSTLN_ITEM-HIGHLEVINST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_EISU_IL_MD_INSTLN_ITEM-HIGHLEVINST.
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_EISU_IL_MD_INSTLN_ITEM_STR, 
ANLAGE TYPE STRING,
BIS TYPE STRING,
AB TYPE STRING,
TARIFTYP TYPE STRING,
ANLSTAT TYPE STRING,
KONZBEFR TYPE STRING,
PAUSCHAL TYPE STRING,
BRANCHE TYPE STRING,
AKLASSE TYPE STRING,
ABLEINH TYPE STRING,
TEMP_AREA TYPE STRING,
KONZVER TYPE STRING,
BILLING_PARTY TYPE STRING,
INVOICING_PARTY TYPE STRING,
PROV_LAST_RES TYPE STRING,
MAININST TYPE STRING,
INSTROLE TYPE STRING,
INSTGRTYPE TYPE STRING,
ISTYPE TYPE STRING,
HIGHLEVINST TYPE STRING,
DUMMY_UTILSINSTH_INCL_EEW_PS TYPE STRING,
SCHEMANR TYPE STRING,
HOCHART TYPE STRING,
VPERGRUP TYPE STRING,
PRUEFGR TYPE STRING,
ABSSTEU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_EISU_IL_MD_INSTLN_ITEM_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_EISU_IL_MD_INSTLN_ITEM_STR-ANLAGE sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-BIS sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-AB sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-TARIFTYP sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-ANLSTAT sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-KONZBEFR sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-PAUSCHAL sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-BRANCHE sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-AKLASSE sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-ABLEINH sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-TEMP_AREA sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-KONZVER sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-BILLING_PARTY sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-INVOICING_PARTY sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-PROV_LAST_RES sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-MAININST sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-INSTROLE sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-INSTGRTYPE sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-ISTYPE sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-HIGHLEVINST sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-DUMMY_UTILSINSTH_INCL_EEW_PS sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-SCHEMANR sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-HOCHART sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-VPERGRUP sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-PRUEFGR sy-vline 
WA_EISU_IL_MD_INSTLN_ITEM_STR-ABSSTEU sy-vline      INTO ld_text SEPARATED BY SPACE.

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