ABAP Select data from SAP table RECE_EVAL_RULE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP RECE_EVAL_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 RECE_EVAL_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 RECE_EVAL_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_RECE_EVAL_RULE TYPE STANDARD TABLE OF RECE_EVAL_RULE,
      WA_RECE_EVAL_RULE TYPE RECE_EVAL_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: <RECE_EVAL_RULE> TYPE RECE_EVAL_RULE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECE_EVAL_RULE
*  INTO TABLE @DATA(IT_RECE_EVAL_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_RECE_EVAL_RULE INDEX 1 INTO DATA(WA_RECE_EVAL_RULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECE_EVAL_RULE>-MANDT = 1.
<RECE_EVAL_RULE>-INTRENO = 1.
<RECE_EVAL_RULE>-RULEGUID = 1.
<RECE_EVAL_RULE>-TERMNO = 1.
<RECE_EVAL_RULE>-TERMTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECE_EVAL_RULE-VALIDFROM, sy-vline,
  WA_RECE_EVAL_RULE-VALIDTO, sy-vline,
  WA_RECE_EVAL_RULE-OBJNR, sy-vline,
  WA_RECE_EVAL_RULE-OBJVALIDFROM, sy-vline,
  WA_RECE_EVAL_RULE-CERULE, sy-vline,
  WA_RECE_EVAL_RULE-CONSBEG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECE_EVAL_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_RECE_EVAL_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_RECE_EVAL_RULE INTO WA_RECE_EVAL_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 ALPHA, internal->external for field TERMNO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RECE_EVAL_RULE-TERMNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECE_EVAL_RULE-TERMNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECE_EVAL_RULE-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECE_EVAL_RULE-VALIDTO.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit REDAT, internal->external for field PROBABLEEND
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECE_EVAL_RULE-PROBABLEEND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECE_EVAL_RULE-PROBABLEEND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field USEFULLIFEEND
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECE_EVAL_RULE-USEFULLIFEEND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECE_EVAL_RULE-USEFULLIFEEND.
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_RECE_EVAL_RULE_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
RULEGUID TYPE STRING,
TERMNO TYPE STRING,
TERMTYPE TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
OBJNR TYPE STRING,
OBJVALIDFROM TYPE STRING,
CERULE TYPE STRING,
CONSBEG TYPE STRING,
POSTBEG TYPE STRING,
ASSETOBJNR TYPE STRING,
CESLTYPE TYPE STRING,
INTERESTRATE TYPE STRING,
TERMNORH TYPE STRING,
DISTRULE TYPE STRING,
DISTRULEPARA1 TYPE STRING,
DISTRULEPARA2 TYPE STRING,
PROBABLEEND TYPE STRING,
USEFULLIFEEND TYPE STRING,
STATUSRULE TYPE STRING,
STATUSEVAL TYPE STRING,
STATUSREASON TYPE STRING,
PROCESSBEHAVIOR TYPE STRING,
TAXTYPE TYPE STRING,
TAXGROUP TYPE STRING,
ACCTOBJNR TYPE STRING,
NOTE TYPE STRING,
SCOPENUM TYPE STRING,
SCOPEDENOM TYPE STRING,
RULECURR TYPE STRING,
QUERYGUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECE_EVAL_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_RECE_EVAL_RULE_STR-MANDT sy-vline 
WA_RECE_EVAL_RULE_STR-INTRENO sy-vline 
WA_RECE_EVAL_RULE_STR-RULEGUID sy-vline 
WA_RECE_EVAL_RULE_STR-TERMNO sy-vline 
WA_RECE_EVAL_RULE_STR-TERMTYPE sy-vline 
WA_RECE_EVAL_RULE_STR-VALIDFROM sy-vline 
WA_RECE_EVAL_RULE_STR-VALIDTO sy-vline 
WA_RECE_EVAL_RULE_STR-OBJNR sy-vline 
WA_RECE_EVAL_RULE_STR-OBJVALIDFROM sy-vline 
WA_RECE_EVAL_RULE_STR-CERULE sy-vline 
WA_RECE_EVAL_RULE_STR-CONSBEG sy-vline 
WA_RECE_EVAL_RULE_STR-POSTBEG sy-vline 
WA_RECE_EVAL_RULE_STR-ASSETOBJNR sy-vline 
WA_RECE_EVAL_RULE_STR-CESLTYPE sy-vline 
WA_RECE_EVAL_RULE_STR-INTERESTRATE sy-vline 
WA_RECE_EVAL_RULE_STR-TERMNORH sy-vline 
WA_RECE_EVAL_RULE_STR-DISTRULE sy-vline 
WA_RECE_EVAL_RULE_STR-DISTRULEPARA1 sy-vline 
WA_RECE_EVAL_RULE_STR-DISTRULEPARA2 sy-vline 
WA_RECE_EVAL_RULE_STR-PROBABLEEND sy-vline 
WA_RECE_EVAL_RULE_STR-USEFULLIFEEND sy-vline 
WA_RECE_EVAL_RULE_STR-STATUSRULE sy-vline 
WA_RECE_EVAL_RULE_STR-STATUSEVAL sy-vline 
WA_RECE_EVAL_RULE_STR-STATUSREASON sy-vline 
WA_RECE_EVAL_RULE_STR-PROCESSBEHAVIOR sy-vline 
WA_RECE_EVAL_RULE_STR-TAXTYPE sy-vline 
WA_RECE_EVAL_RULE_STR-TAXGROUP sy-vline 
WA_RECE_EVAL_RULE_STR-ACCTOBJNR sy-vline 
WA_RECE_EVAL_RULE_STR-NOTE sy-vline 
WA_RECE_EVAL_RULE_STR-SCOPENUM sy-vline 
WA_RECE_EVAL_RULE_STR-SCOPEDENOM sy-vline 
WA_RECE_EVAL_RULE_STR-RULECURR sy-vline 
WA_RECE_EVAL_RULE_STR-QUERYGUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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