ABAP Select data from SAP table IEINSTALLATION into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IEINSTALLATION 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 IEINSTALLATION. 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 IEINSTALLATION 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_IEINSTALLATION TYPE STANDARD TABLE OF IEINSTALLATION,
      WA_IEINSTALLATION TYPE IEINSTALLATION,
      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: <IEINSTALLATION> TYPE IEINSTALLATION.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEINSTALLATION
*  INTO TABLE @DATA(IT_IEINSTALLATION2).
*--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_IEINSTALLATION INDEX 1 INTO DATA(WA_IEINSTALLATION2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEINSTALLATION>-MANDT = 1.
<IEINSTALLATION>-UTILITIESINSTALLATION = 1.
<IEINSTALLATION>-UTILITIESINSTALLATIONTYPE = 1.
<IEINSTALLATION>-DIVISION = 1.
<IEINSTALLATION>-UTILITIESINSTVOLTAGELEVEL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEINSTALLATION-UTILITIESINSTGASPRSSRLVL, sy-vline,
  WA_IEINSTALLATION-UTILSINSTTIMEZONE, sy-vline,
  WA_IEINSTALLATION-UTILSINSTGUAROFSUPREASON, sy-vline,
  WA_IEINSTALLATION-UTILSINSTDEREGULATIONSTS, sy-vline,
  WA_IEINSTALLATION-UTILSINSTDATARELEASESTATUS, sy-vline,
  WA_IEINSTALLATION-UTILITIESSRVCPROVIDERROLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEINSTALLATION 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_IEINSTALLATION 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_IEINSTALLATION INTO WA_IEINSTALLATION.


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

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

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

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

*Conversion exit ALPHA, internal->external for field UTILITIESPREMISE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEINSTALLATION-UTILITIESPREMISE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEINSTALLATION-UTILITIESPREMISE.
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_IEINSTALLATION_STR, 
MANDT TYPE STRING,
UTILITIESINSTALLATION TYPE STRING,
UTILITIESINSTALLATIONTYPE TYPE STRING,
DIVISION TYPE STRING,
UTILITIESINSTVOLTAGELEVEL TYPE STRING,
UTILITIESINSTGASPRSSRLVL TYPE STRING,
UTILSINSTTIMEZONE TYPE STRING,
UTILSINSTGUAROFSUPREASON TYPE STRING,
UTILSINSTDEREGULATIONSTS TYPE STRING,
UTILSINSTDATARELEASESTATUS TYPE STRING,
UTILITIESSRVCPROVIDERROLE TYPE STRING,
UTILSINSTISFORENERGYFEEDIN TYPE STRING,
UTILSINSTCREATIONDATE TYPE STRING,
UTILSINSTCREATEDBYUSER TYPE STRING,
UTILSINSTLASTCHANGEDATE TYPE STRING,
UTILSINSTLASTCHANGEDBYUSER TYPE STRING,
METERREADINGBLOCKINGREASON TYPE STRING,
METERREADINGBASEPERIODCAT TYPE STRING,
NMBROFALLWDMTRRDNGSCNTRLCODE TYPE STRING,
AUTHORIZATIONGROUP TYPE STRING,
ISMARKEDFORDELETION TYPE STRING,
UTILITIESPREMISE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEINSTALLATION_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_IEINSTALLATION_STR-MANDT sy-vline 
WA_IEINSTALLATION_STR-UTILITIESINSTALLATION sy-vline 
WA_IEINSTALLATION_STR-UTILITIESINSTALLATIONTYPE sy-vline 
WA_IEINSTALLATION_STR-DIVISION sy-vline 
WA_IEINSTALLATION_STR-UTILITIESINSTVOLTAGELEVEL sy-vline 
WA_IEINSTALLATION_STR-UTILITIESINSTGASPRSSRLVL sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTTIMEZONE sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTGUAROFSUPREASON sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTDEREGULATIONSTS sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTDATARELEASESTATUS sy-vline 
WA_IEINSTALLATION_STR-UTILITIESSRVCPROVIDERROLE sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTISFORENERGYFEEDIN sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTCREATIONDATE sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTCREATEDBYUSER sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTLASTCHANGEDATE sy-vline 
WA_IEINSTALLATION_STR-UTILSINSTLASTCHANGEDBYUSER sy-vline 
WA_IEINSTALLATION_STR-METERREADINGBLOCKINGREASON sy-vline 
WA_IEINSTALLATION_STR-METERREADINGBASEPERIODCAT sy-vline 
WA_IEINSTALLATION_STR-NMBROFALLWDMTRRDNGSCNTRLCODE sy-vline 
WA_IEINSTALLATION_STR-AUTHORIZATIONGROUP sy-vline 
WA_IEINSTALLATION_STR-ISMARKEDFORDELETION sy-vline 
WA_IEINSTALLATION_STR-UTILITIESPREMISE sy-vline      INTO ld_text SEPARATED BY SPACE.

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