ABAP Select data from SAP table RETMC_NOTICE_RULE_PR_X into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RETMC_NOTICE_RULE_PR_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 RETMC_NOTICE_RULE_PR_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 RETMC_NOTICE_RULE_PR_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_RETMC_NOTICE_RULE_PR_X TYPE STANDARD TABLE OF RETMC_NOTICE_RULE_PR_X,
      WA_RETMC_NOTICE_RULE_PR_X TYPE RETMC_NOTICE_RULE_PR_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: <RETMC_NOTICE_RULE_PR_X> TYPE RETMC_NOTICE_RULE_PR_X.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RETMC_NOTICE_RULE_PR_X
*  INTO TABLE @DATA(IT_RETMC_NOTICE_RULE_PR_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_RETMC_NOTICE_RULE_PR_X INDEX 1 INTO DATA(WA_RETMC_NOTICE_RULE_PR_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RETMC_NOTICE_RULE_PR_X>-MANDT = 1.
<RETMC_NOTICE_RULE_PR_X>-NTRULE = 1.
<RETMC_NOTICE_RULE_PR_X>-NTRULENO = 1.
<RETMC_NOTICE_RULE_PR_X>-NTLIMITYEARS = 1.
<RETMC_NOTICE_RULE_PR_X>-NTLIMITMONTHS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RETMC_NOTICE_RULE_PR_X-NTLIMITDAYS, sy-vline,
  WA_RETMC_NOTICE_RULE_PR_X-NTRHYTHMTYPE, sy-vline,
  WA_RETMC_NOTICE_RULE_PR_X-NTPERMONTHS, sy-vline,
  WA_RETMC_NOTICE_RULE_PR_X-NTPERWEEKS, sy-vline,
  WA_RETMC_NOTICE_RULE_PR_X-NTPERDAYS, sy-vline,
  WA_RETMC_NOTICE_RULE_PR_X-NTPERGRACEDAYS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RETMC_NOTICE_RULE_PR_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_RETMC_NOTICE_RULE_PR_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_RETMC_NOTICE_RULE_PR_X INTO WA_RETMC_NOTICE_RULE_PR_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.
ENDFORM. 

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

TYPES: BEGIN OF T_RETMC_NOTICE_RULE_PR_X_STR, 
MANDT TYPE STRING,
NTRULE TYPE STRING,
NTRULENO TYPE STRING,
NTLIMITYEARS TYPE STRING,
NTLIMITMONTHS TYPE STRING,
NTLIMITDAYS TYPE STRING,
NTRHYTHMTYPE TYPE STRING,
NTPERMONTHS TYPE STRING,
NTPERWEEKS TYPE STRING,
NTPERDAYS TYPE STRING,
NTPERGRACEDAYS TYPE STRING,
NTPERCDWD TYPE STRING,
NTPERCALENDAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RETMC_NOTICE_RULE_PR_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_RETMC_NOTICE_RULE_PR_X_STR-MANDT sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTRULE sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTRULENO sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTLIMITYEARS sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTLIMITMONTHS sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTLIMITDAYS sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTRHYTHMTYPE sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTPERMONTHS sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTPERWEEKS sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTPERDAYS sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTPERGRACEDAYS sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTPERCDWD sy-vline 
WA_RETMC_NOTICE_RULE_PR_X_STR-NTPERCALENDAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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