ABAP Select data from SAP table REAJC_RULE_COMP_X into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REAJC_RULE_COMP_X
*  INTO TABLE @DATA(IT_REAJC_RULE_COMP_X2).
*--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_REAJC_RULE_COMP_X INDEX 1 INTO DATA(WA_REAJC_RULE_COMP_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REAJC_RULE_COMP_X>-MANDT = 1.
<REAJC_RULE_COMP_X>-ADJMRULE = 1.
<REAJC_RULE_COMP_X>-RULECHANGEABLE = 1.
<REAJC_RULE_COMP_X>-RULEEXPAND = 1.
<REAJC_RULE_COMP_X>-BUKRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REAJC_RULE_COMP_X-COMPGRP, sy-vline,
  WA_REAJC_RULE_COMP_X-COMPADJM, sy-vline,
  WA_REAJC_RULE_COMP_X-USEAVERAGE, sy-vline,
  WA_REAJC_RULE_COMP_X-COMPMEAS, sy-vline,
  WA_REAJC_RULE_COMP_X-COMPUNIT, sy-vline,
  WA_REAJC_RULE_COMP_X-CONDPURPOSE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REAJC_RULE_COMP_X 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_REAJC_RULE_COMP_X 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_REAJC_RULE_COMP_X INTO WA_REAJC_RULE_COMP_X.


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

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

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

*Conversion exit CUNIT, internal->external for field COMPUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REAJC_RULE_COMP_X-COMPUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REAJC_RULE_COMP_X-COMPUNIT.
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_REAJC_RULE_COMP_X_STR, 
MANDT TYPE STRING,
ADJMRULE TYPE STRING,
RULECHANGEABLE TYPE STRING,
RULEEXPAND TYPE STRING,
BUKRS TYPE STRING,
COMPGRP TYPE STRING,
COMPADJM TYPE STRING,
USEAVERAGE TYPE STRING,
COMPMEAS TYPE STRING,
COMPUNIT TYPE STRING,
CONDPURPOSE TYPE STRING,
INCLINTERN TYPE STRING,
FBUKRS TYPE STRING,
FCOMPGRP TYPE STRING,
FCOMPADJM TYPE STRING,
FUSEAVERAGE TYPE STRING,
FCOMPMEAS TYPE STRING,
FCOMPUNIT TYPE STRING,
FCONDPURPOSE TYPE STRING,
FINCLINTERN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REAJC_RULE_COMP_X_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_REAJC_RULE_COMP_X_STR-MANDT sy-vline 
WA_REAJC_RULE_COMP_X_STR-ADJMRULE sy-vline 
WA_REAJC_RULE_COMP_X_STR-RULECHANGEABLE sy-vline 
WA_REAJC_RULE_COMP_X_STR-RULEEXPAND sy-vline 
WA_REAJC_RULE_COMP_X_STR-BUKRS sy-vline 
WA_REAJC_RULE_COMP_X_STR-COMPGRP sy-vline 
WA_REAJC_RULE_COMP_X_STR-COMPADJM sy-vline 
WA_REAJC_RULE_COMP_X_STR-USEAVERAGE sy-vline 
WA_REAJC_RULE_COMP_X_STR-COMPMEAS sy-vline 
WA_REAJC_RULE_COMP_X_STR-COMPUNIT sy-vline 
WA_REAJC_RULE_COMP_X_STR-CONDPURPOSE sy-vline 
WA_REAJC_RULE_COMP_X_STR-INCLINTERN sy-vline 
WA_REAJC_RULE_COMP_X_STR-FBUKRS sy-vline 
WA_REAJC_RULE_COMP_X_STR-FCOMPGRP sy-vline 
WA_REAJC_RULE_COMP_X_STR-FCOMPADJM sy-vline 
WA_REAJC_RULE_COMP_X_STR-FUSEAVERAGE sy-vline 
WA_REAJC_RULE_COMP_X_STR-FCOMPMEAS sy-vline 
WA_REAJC_RULE_COMP_X_STR-FCOMPUNIT sy-vline 
WA_REAJC_RULE_COMP_X_STR-FCONDPURPOSE sy-vline 
WA_REAJC_RULE_COMP_X_STR-FINCLINTERN sy-vline      INTO ld_text SEPARATED BY SPACE.

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