ABAP Select data from SAP table IARUNRULE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IARUNRULE
*  INTO TABLE @DATA(IT_IARUNRULE2).
*--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_IARUNRULE INDEX 1 INTO DATA(WA_IARUNRULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IARUNRULE>-MANDT = 1.
<IARUNRULE>-ARUNRULEUUID = 1.
<IARUNRULE>-ARUNRULENAME = 1.
<IARUNRULE>-ARUNRULEDESCRIPTION = 1.
<IARUNRULE>-ABOPSTOCKSORTRULE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IARUNRULE-ABOPALLOCRELEASEISREQUIRED, sy-vline,
  WA_IARUNRULE-ABOPSUPPLYSELHORIZONINDAYS, sy-vline,
  WA_IARUNRULE-ABOPASSIGNMENTPREVIEWISACTIVE, sy-vline,
  WA_IARUNRULE-ABOPSUPPLYREASSIGNMENTISREQD, sy-vline,
  WA_IARUNRULE-ARUNSTKOVERWRITEISREQUIRED, sy-vline,
  WA_IARUNRULE-ARUNPHYSICALSTKISSELECTED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IARUNRULE 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_IARUNRULE 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_IARUNRULE INTO WA_IARUNRULE.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_IARUNRULE_STR, 
MANDT TYPE STRING,
ARUNRULEUUID TYPE STRING,
ARUNRULENAME TYPE STRING,
ARUNRULEDESCRIPTION TYPE STRING,
ABOPSTOCKSORTRULE TYPE STRING,
ABOPALLOCRELEASEISREQUIRED TYPE STRING,
ABOPSUPPLYSELHORIZONINDAYS TYPE STRING,
ABOPASSIGNMENTPREVIEWISACTIVE TYPE STRING,
ABOPSUPPLYREASSIGNMENTISREQD TYPE STRING,
ARUNSTKOVERWRITEISREQUIRED TYPE STRING,
ARUNPHYSICALSTKISSELECTED TYPE STRING,
ARUNPOSTKISSELECTED TYPE STRING,
ARUNASNSTKISSELECTED TYPE STRING,
ARUNPRODNORDSTKISSELECTED TYPE STRING,
ARUNPURREQNSTKISSELECTED TYPE STRING,
ARUNPLNDORDSTKISSELECTED TYPE STRING,
ARUNRELEASERULE TYPE STRING,
ARUNDISTRIBUTIONSTRATEGY TYPE STRING,
ARUNGROUPINGSTRATEGY TYPE STRING,
ARUNMINASSGMTPERCENT TYPE STRING,
ARUNMAXASSGMTPERCENT TYPE STRING,
ARUNSUPPROTEXECMODE TYPE STRING,
ARUNDEMANDGROUPRULEUUID TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IARUNRULE_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_IARUNRULE_STR-MANDT sy-vline 
WA_IARUNRULE_STR-ARUNRULEUUID sy-vline 
WA_IARUNRULE_STR-ARUNRULENAME sy-vline 
WA_IARUNRULE_STR-ARUNRULEDESCRIPTION sy-vline 
WA_IARUNRULE_STR-ABOPSTOCKSORTRULE sy-vline 
WA_IARUNRULE_STR-ABOPALLOCRELEASEISREQUIRED sy-vline 
WA_IARUNRULE_STR-ABOPSUPPLYSELHORIZONINDAYS sy-vline 
WA_IARUNRULE_STR-ABOPASSIGNMENTPREVIEWISACTIVE sy-vline 
WA_IARUNRULE_STR-ABOPSUPPLYREASSIGNMENTISREQD sy-vline 
WA_IARUNRULE_STR-ARUNSTKOVERWRITEISREQUIRED sy-vline 
WA_IARUNRULE_STR-ARUNPHYSICALSTKISSELECTED sy-vline 
WA_IARUNRULE_STR-ARUNPOSTKISSELECTED sy-vline 
WA_IARUNRULE_STR-ARUNASNSTKISSELECTED sy-vline 
WA_IARUNRULE_STR-ARUNPRODNORDSTKISSELECTED sy-vline 
WA_IARUNRULE_STR-ARUNPURREQNSTKISSELECTED sy-vline 
WA_IARUNRULE_STR-ARUNPLNDORDSTKISSELECTED sy-vline 
WA_IARUNRULE_STR-ARUNRELEASERULE sy-vline 
WA_IARUNRULE_STR-ARUNDISTRIBUTIONSTRATEGY sy-vline 
WA_IARUNRULE_STR-ARUNGROUPINGSTRATEGY sy-vline 
WA_IARUNRULE_STR-ARUNMINASSGMTPERCENT sy-vline 
WA_IARUNRULE_STR-ARUNMAXASSGMTPERCENT sy-vline 
WA_IARUNRULE_STR-ARUNSUPPROTEXECMODE sy-vline 
WA_IARUNRULE_STR-ARUNDEMANDGROUPRULEUUID sy-vline 
WA_IARUNRULE_STR-CREATEDBYUSER sy-vline 
WA_IARUNRULE_STR-CREATIONDATETIME sy-vline 
WA_IARUNRULE_STR-LASTCHANGEDBYUSER sy-vline 
WA_IARUNRULE_STR-LASTCHANGEDATETIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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