ABAP Select data from SAP table REORC_RS_REVERSAL_RULE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REORC_RS_REVERSAL_RULE
*  INTO TABLE @DATA(IT_REORC_RS_REVERSAL_RULE2).
*--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_REORC_RS_REVERSAL_RULE INDEX 1 INTO DATA(WA_REORC_RS_REVERSAL_RULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REORC_RS_REVERSAL_RULE>-MANDT = 1.
<REORC_RS_REVERSAL_RULE>-RSREVERSAL = 1.
<REORC_RS_REVERSAL_RULE>-SEQNO = 1.
<REORC_RS_REVERSAL_RULE>-TIMEBEFORERS = 1.
<REORC_RS_REVERSAL_RULE>-TIMEUNIT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REORC_RS_REVERSAL_RULE-REVIND, sy-vline,
  WA_REORC_RS_REVERSAL_RULE-REVPERCENT, sy-vline,
  WA_REORC_RS_REVERSAL_RULE-AMOUNT, sy-vline,
  WA_REORC_RS_REVERSAL_RULE-AMOUNTTIMEUNIT, sy-vline,
  WA_REORC_RS_REVERSAL_RULE-AMOUNTMIN, sy-vline,
  WA_REORC_RS_REVERSAL_RULE-AMOUNTMAX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REORC_RS_REVERSAL_RULE 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_REORC_RS_REVERSAL_RULE 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_REORC_RS_REVERSAL_RULE INTO WA_REORC_RS_REVERSAL_RULE.


*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 CUNIT, internal->external for field TIMEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REORC_RS_REVERSAL_RULE-TIMEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REORC_RS_REVERSAL_RULE-TIMEUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field AMOUNTTIMEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REORC_RS_REVERSAL_RULE-AMOUNTTIMEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REORC_RS_REVERSAL_RULE-AMOUNTTIMEUNIT.
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_REORC_RS_REVERSAL_RULE_STR, 
MANDT TYPE STRING,
RSREVERSAL TYPE STRING,
SEQNO TYPE STRING,
TIMEBEFORERS TYPE STRING,
TIMEUNIT TYPE STRING,
REVIND TYPE STRING,
REVPERCENT TYPE STRING,
AMOUNT TYPE STRING,
AMOUNTTIMEUNIT TYPE STRING,
AMOUNTMIN TYPE STRING,
AMOUNTMAX TYPE STRING,
CURRKEY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REORC_RS_REVERSAL_RULE_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_REORC_RS_REVERSAL_RULE_STR-MANDT sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-RSREVERSAL sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-SEQNO sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-TIMEBEFORERS sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-TIMEUNIT sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-REVIND sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-REVPERCENT sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-AMOUNT sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-AMOUNTTIMEUNIT sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-AMOUNTMIN sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-AMOUNTMAX sy-vline 
WA_REORC_RS_REVERSAL_RULE_STR-CURRKEY sy-vline      INTO ld_text SEPARATED BY SPACE.

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