ABAP Select data from SAP table IREADJRULE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IREADJRULE
*  INTO TABLE @DATA(IT_IREADJRULE2).
*--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_IREADJRULE INDEX 1 INTO DATA(WA_IREADJRULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IREADJRULE>-MANDT = 1.
<IREADJRULE>-READJUSTMENTRULE = 1.
<IREADJRULE>-READJUSTMENTMETHOD = 1.
<IREADJRULE>-RERULEISCHANGEABLE = 1.
<IREADJRULE>-READJUSTMENTRULEISCOMBINED = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IREADJRULE-READJUSTMENTRULEISPARTLYCMBND, sy-vline,
  WA_IREADJRULE-REISRULEAPPROVALREQUIRED, sy-vline,
  WA_IREADJRULE-REISACTVTNWITHOUTAPPRVL, sy-vline,
  WA_IREADJRULE-REISDUEDATECHANGEABLE, sy-vline,
  WA_IREADJRULE-READJUSTMENTPERCENTPASSEDVALUE, sy-vline,
  WA_IREADJRULE-REHASRENTALOBJECTINCREASE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IREADJRULE 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_IREADJRULE 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_IREADJRULE INTO WA_IREADJRULE.


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

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

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

*Conversion exit ALPHA, internal->external for field RECONDITIONTYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IREADJRULE-RECONDITIONTYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IREADJRULE-RECONDITIONTYPE.
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_IREADJRULE_STR, 
MANDT TYPE STRING,
READJUSTMENTRULE TYPE STRING,
READJUSTMENTMETHOD TYPE STRING,
RERULEISCHANGEABLE TYPE STRING,
READJUSTMENTRULEISCOMBINED TYPE STRING,
READJUSTMENTRULEISPARTLYCMBND TYPE STRING,
REISRULEAPPROVALREQUIRED TYPE STRING,
REISACTVTNWITHOUTAPPRVL TYPE STRING,
REISDUEDATECHANGEABLE TYPE STRING,
READJUSTMENTPERCENTPASSEDVALUE TYPE STRING,
REHASRENTALOBJECTINCREASE TYPE STRING,
READJUSTMENTDIRECTION TYPE STRING,
READJUSTMENTCHANGEDIRECTION TYPE STRING,
READJUSTMENTFREQUENCY TYPE STRING,
REFREQUENCYUNIT TYPE STRING,
REISINTERVALFROMFRQCYSTART TYPE STRING,
REISSIMULATIONRULE TYPE STRING,
RERULEHASNODOCUMENT TYPE STRING,
READJUSTMENTSUBSQNTCONDITION TYPE STRING,
READJUSTMENTISONNEXTNOTICE TYPE STRING,
READJUSTMENTBASE TYPE STRING,
READJUSTMENTISAUTODEFAULT TYPE STRING,
READJUSTMENTISNOTIFREQUIRED TYPE STRING,
RERULESORTORDER TYPE STRING,
READJUSTMENTISTIMEDEPENDENT TYPE STRING,
READJUSTMENTDUEDATEISMANDATORY TYPE STRING,
READJUSTMENTISNOTRETROACTIVE TYPE STRING,
READJUSTMENTBLOCKREASON TYPE STRING,
RECURRENCYTRANSLATIONRULE TYPE STRING,
RECONDITIONTYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IREADJRULE_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_IREADJRULE_STR-MANDT sy-vline 
WA_IREADJRULE_STR-READJUSTMENTRULE sy-vline 
WA_IREADJRULE_STR-READJUSTMENTMETHOD sy-vline 
WA_IREADJRULE_STR-RERULEISCHANGEABLE sy-vline 
WA_IREADJRULE_STR-READJUSTMENTRULEISCOMBINED sy-vline 
WA_IREADJRULE_STR-READJUSTMENTRULEISPARTLYCMBND sy-vline 
WA_IREADJRULE_STR-REISRULEAPPROVALREQUIRED sy-vline 
WA_IREADJRULE_STR-REISACTVTNWITHOUTAPPRVL sy-vline 
WA_IREADJRULE_STR-REISDUEDATECHANGEABLE sy-vline 
WA_IREADJRULE_STR-READJUSTMENTPERCENTPASSEDVALUE sy-vline 
WA_IREADJRULE_STR-REHASRENTALOBJECTINCREASE sy-vline 
WA_IREADJRULE_STR-READJUSTMENTDIRECTION sy-vline 
WA_IREADJRULE_STR-READJUSTMENTCHANGEDIRECTION sy-vline 
WA_IREADJRULE_STR-READJUSTMENTFREQUENCY sy-vline 
WA_IREADJRULE_STR-REFREQUENCYUNIT sy-vline 
WA_IREADJRULE_STR-REISINTERVALFROMFRQCYSTART sy-vline 
WA_IREADJRULE_STR-REISSIMULATIONRULE sy-vline 
WA_IREADJRULE_STR-RERULEHASNODOCUMENT sy-vline 
WA_IREADJRULE_STR-READJUSTMENTSUBSQNTCONDITION sy-vline 
WA_IREADJRULE_STR-READJUSTMENTISONNEXTNOTICE sy-vline 
WA_IREADJRULE_STR-READJUSTMENTBASE sy-vline 
WA_IREADJRULE_STR-READJUSTMENTISAUTODEFAULT sy-vline 
WA_IREADJRULE_STR-READJUSTMENTISNOTIFREQUIRED sy-vline 
WA_IREADJRULE_STR-RERULESORTORDER sy-vline 
WA_IREADJRULE_STR-READJUSTMENTISTIMEDEPENDENT sy-vline 
WA_IREADJRULE_STR-READJUSTMENTDUEDATEISMANDATORY sy-vline 
WA_IREADJRULE_STR-READJUSTMENTISNOTRETROACTIVE sy-vline 
WA_IREADJRULE_STR-READJUSTMENTBLOCKREASON sy-vline 
WA_IREADJRULE_STR-RECURRENCYTRANSLATIONRULE sy-vline 
WA_IREADJRULE_STR-RECONDITIONTYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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