ABAP Select data from SAP table IEINSTHISTORY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IEINSTHISTORY
*  INTO TABLE @DATA(IT_IEINSTHISTORY2).
*--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_IEINSTHISTORY INDEX 1 INTO DATA(WA_IEINSTHISTORY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IEINSTHISTORY>-MANDT = 1.
<IEINSTHISTORY>-UTILITIESINSTALLATION = 1.
<IEINSTHISTORY>-UTILSINSTHISTVALIDITYENDDATE = 1.
<IEINSTHISTORY>-UTILSINSTHISTVALIDITYSTARTDATE = 1.
<IEINSTHISTORY>-UTILITIESRATECATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IEINSTHISTORY-UTILITIESBILLINGSCHEMA, sy-vline,
  WA_IEINSTHISTORY-UTILITIESBILLINGCLASS, sy-vline,
  WA_IEINSTHISTORY-METERREADINGUNIT, sy-vline,
  WA_IEINSTHISTORY-UTILITIESTEMPERATUREAREA, sy-vline,
  WA_IEINSTHISTORY-UTILSINSTISEXMPTFRMFRNCHSFEE, sy-vline,
  WA_IEINSTHISTORY-UTILSINSTDVCEALLCTNISNOTALLWD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IEINSTHISTORY 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_IEINSTHISTORY 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_IEINSTHISTORY INTO WA_IEINSTHISTORY.


*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_IEINSTHISTORY-UTILITIESINSTALLATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEINSTHISTORY-UTILITIESINSTALLATION.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ALPHA, internal->external for field HIGHERLEVELUTILSINSTALLATION
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IEINSTHISTORY-HIGHERLEVELUTILSINSTALLATION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IEINSTHISTORY-HIGHERLEVELUTILSINSTALLATION.
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_IEINSTHISTORY_STR, 
MANDT TYPE STRING,
UTILITIESINSTALLATION TYPE STRING,
UTILSINSTHISTVALIDITYENDDATE TYPE STRING,
UTILSINSTHISTVALIDITYSTARTDATE TYPE STRING,
UTILITIESRATECATEGORY TYPE STRING,
UTILITIESBILLINGSCHEMA TYPE STRING,
UTILITIESBILLINGCLASS TYPE STRING,
METERREADINGUNIT TYPE STRING,
UTILITIESTEMPERATUREAREA TYPE STRING,
UTILSINSTISEXMPTFRMFRNCHSFEE TYPE STRING,
UTILSINSTDVCEALLCTNISNOTALLWD TYPE STRING,
UTILITIESFRANCHISECONTRACT TYPE STRING,
UTILITIESBILLINGPARTY TYPE STRING,
UTILITIESINVOICINGPARTY TYPE STRING,
OBLIGATORYSUPUTILSSRVCPROVIDER TYPE STRING,
PRIMARYUTILITIESINSTALLATION TYPE STRING,
UTILSINSTALLATIONGROUPROLE TYPE STRING,
UTILSINSTALLATIONGROUPTYPE TYPE STRING,
HIGHERLEVELUTILSINSTALLATION TYPE STRING,
UNBILLDREVNXTRAPLTNTYPE TYPE STRING,
UTILSREGDEPDNTVALDTNGROUP TYPE STRING,
INDUSTRYSECTOR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IEINSTHISTORY_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_IEINSTHISTORY_STR-MANDT sy-vline 
WA_IEINSTHISTORY_STR-UTILITIESINSTALLATION sy-vline 
WA_IEINSTHISTORY_STR-UTILSINSTHISTVALIDITYENDDATE sy-vline 
WA_IEINSTHISTORY_STR-UTILSINSTHISTVALIDITYSTARTDATE sy-vline 
WA_IEINSTHISTORY_STR-UTILITIESRATECATEGORY sy-vline 
WA_IEINSTHISTORY_STR-UTILITIESBILLINGSCHEMA sy-vline 
WA_IEINSTHISTORY_STR-UTILITIESBILLINGCLASS sy-vline 
WA_IEINSTHISTORY_STR-METERREADINGUNIT sy-vline 
WA_IEINSTHISTORY_STR-UTILITIESTEMPERATUREAREA sy-vline 
WA_IEINSTHISTORY_STR-UTILSINSTISEXMPTFRMFRNCHSFEE sy-vline 
WA_IEINSTHISTORY_STR-UTILSINSTDVCEALLCTNISNOTALLWD sy-vline 
WA_IEINSTHISTORY_STR-UTILITIESFRANCHISECONTRACT sy-vline 
WA_IEINSTHISTORY_STR-UTILITIESBILLINGPARTY sy-vline 
WA_IEINSTHISTORY_STR-UTILITIESINVOICINGPARTY sy-vline 
WA_IEINSTHISTORY_STR-OBLIGATORYSUPUTILSSRVCPROVIDER sy-vline 
WA_IEINSTHISTORY_STR-PRIMARYUTILITIESINSTALLATION sy-vline 
WA_IEINSTHISTORY_STR-UTILSINSTALLATIONGROUPROLE sy-vline 
WA_IEINSTHISTORY_STR-UTILSINSTALLATIONGROUPTYPE sy-vline 
WA_IEINSTHISTORY_STR-HIGHERLEVELUTILSINSTALLATION sy-vline 
WA_IEINSTHISTORY_STR-UNBILLDREVNXTRAPLTNTYPE sy-vline 
WA_IEINSTHISTORY_STR-UTILSREGDEPDNTVALDTNGROUP sy-vline 
WA_IEINSTHISTORY_STR-INDUSTRYSECTOR sy-vline      INTO ld_text SEPARATED BY SPACE.

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