ABAP Select data from SAP table RECA_RECURRENCE_RULE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RECA_RECURRENCE_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 RECA_RECURRENCE_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 RECA_RECURRENCE_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_RECA_RECURRENCE_RULE TYPE STANDARD TABLE OF RECA_RECURRENCE_RULE,
      WA_RECA_RECURRENCE_RULE TYPE RECA_RECURRENCE_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: <RECA_RECURRENCE_RULE> TYPE RECA_RECURRENCE_RULE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECA_RECURRENCE_RULE
*  INTO TABLE @DATA(IT_RECA_RECURRENCE_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_RECA_RECURRENCE_RULE INDEX 1 INTO DATA(WA_RECA_RECURRENCE_RULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECA_RECURRENCE_RULE>-MANDT = 1.
<RECA_RECURRENCE_RULE>-RECURNO = 1.
<RECA_RECURRENCE_RULE>-SEQNO = 1.
<RECA_RECURRENCE_RULE>-VALIDFROM = 1.
<RECA_RECURRENCE_RULE>-VALIDTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECA_RECURRENCE_RULE-RECURCOUNT, sy-vline,
  WA_RECA_RECURRENCE_RULE-TIMEFROM, sy-vline,
  WA_RECA_RECURRENCE_RULE-TIMETO, sy-vline,
  WA_RECA_RECURRENCE_RULE-RECURFREQUENCY, sy-vline,
  WA_RECA_RECURRENCE_RULE-RECURINTERVAL, sy-vline,
  WA_RECA_RECURRENCE_RULE-ONDAYMO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECA_RECURRENCE_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_RECA_RECURRENCE_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_RECA_RECURRENCE_RULE INTO WA_RECA_RECURRENCE_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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECA_RECURRENCE_RULE-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECA_RECURRENCE_RULE-VALIDTO.
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_RECA_RECURRENCE_RULE_STR, 
MANDT TYPE STRING,
RECURNO TYPE STRING,
SEQNO TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
RECURCOUNT TYPE STRING,
TIMEFROM TYPE STRING,
TIMETO TYPE STRING,
RECURFREQUENCY TYPE STRING,
RECURINTERVAL TYPE STRING,
ONDAYMO TYPE STRING,
ONDAYTU TYPE STRING,
ONDAYWE TYPE STRING,
ONDAYTH TYPE STRING,
ONDAYFR TYPE STRING,
ONDAYSA TYPE STRING,
ONDAYSU TYPE STRING,
ONHOLIDAY TYPE STRING,
ONMONTHDAY TYPE STRING,
ONMONTH TYPE STRING,
INSTANCE TYPE STRING,
ISEXCLUDED TYPE STRING,
HOLIDAYCALENDAR TYPE STRING,
TZONE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECA_RECURRENCE_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_RECA_RECURRENCE_RULE_STR-MANDT sy-vline 
WA_RECA_RECURRENCE_RULE_STR-RECURNO sy-vline 
WA_RECA_RECURRENCE_RULE_STR-SEQNO sy-vline 
WA_RECA_RECURRENCE_RULE_STR-VALIDFROM sy-vline 
WA_RECA_RECURRENCE_RULE_STR-VALIDTO sy-vline 
WA_RECA_RECURRENCE_RULE_STR-RECURCOUNT sy-vline 
WA_RECA_RECURRENCE_RULE_STR-TIMEFROM sy-vline 
WA_RECA_RECURRENCE_RULE_STR-TIMETO sy-vline 
WA_RECA_RECURRENCE_RULE_STR-RECURFREQUENCY sy-vline 
WA_RECA_RECURRENCE_RULE_STR-RECURINTERVAL sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONDAYMO sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONDAYTU sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONDAYWE sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONDAYTH sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONDAYFR sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONDAYSA sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONDAYSU sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONHOLIDAY sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONMONTHDAY sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ONMONTH sy-vline 
WA_RECA_RECURRENCE_RULE_STR-INSTANCE sy-vline 
WA_RECA_RECURRENCE_RULE_STR-ISEXCLUDED sy-vline 
WA_RECA_RECURRENCE_RULE_STR-HOLIDAYCALENDAR sy-vline 
WA_RECA_RECURRENCE_RULE_STR-TZONE sy-vline      INTO ld_text SEPARATED BY SPACE.

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