ABAP Select data from SAP table FPB_VAR_RULES into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FPB_VAR_RULES
*  INTO TABLE @DATA(IT_FPB_VAR_RULES2).
*--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_FPB_VAR_RULES INDEX 1 INTO DATA(WA_FPB_VAR_RULES2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FPB_VAR_RULES>-MANDT = 1.
<FPB_VAR_RULES>-UNAME = 1.
<FPB_VAR_RULES>-MONAPPL = 1.
<FPB_VAR_RULES>-RULEID = 1.
<FPB_VAR_RULES>-NAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FPB_VAR_RULES-OBJECTS, sy-vline,
  WA_FPB_VAR_RULES-KFSPECGL, sy-vline,
  WA_FPB_VAR_RULES-TIMERANGE, sy-vline,
  WA_FPB_VAR_RULES-KFSPEC1, sy-vline,
  WA_FPB_VAR_RULES-KFSPEC2, sy-vline,
  WA_FPB_VAR_RULES-LIMITABS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FPB_VAR_RULES 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_FPB_VAR_RULES 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_FPB_VAR_RULES INTO WA_FPB_VAR_RULES.


*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_FPB_VAR_RULES_STR, 
MANDT TYPE STRING,
UNAME TYPE STRING,
MONAPPL TYPE STRING,
RULEID TYPE STRING,
NAME TYPE STRING,
OBJECTS TYPE STRING,
KFSPECGL TYPE STRING,
TIMERANGE TYPE STRING,
KFSPEC1 TYPE STRING,
KFSPEC2 TYPE STRING,
LIMITABS TYPE STRING,
WAERS TYPE STRING,
LIMITREL TYPE STRING,
LIMITSIGN TYPE STRING,
EVALDATE TYPE STRING,
EVALTIME TYPE STRING,
DISPLAYDATE TYPE STRING,
UNCHANGEABLE TYPE STRING,
ADMINRULE TYPE STRING,
GUID TYPE STRING,
SHOW_ALERT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FPB_VAR_RULES_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_FPB_VAR_RULES_STR-MANDT sy-vline 
WA_FPB_VAR_RULES_STR-UNAME sy-vline 
WA_FPB_VAR_RULES_STR-MONAPPL sy-vline 
WA_FPB_VAR_RULES_STR-RULEID sy-vline 
WA_FPB_VAR_RULES_STR-NAME sy-vline 
WA_FPB_VAR_RULES_STR-OBJECTS sy-vline 
WA_FPB_VAR_RULES_STR-KFSPECGL sy-vline 
WA_FPB_VAR_RULES_STR-TIMERANGE sy-vline 
WA_FPB_VAR_RULES_STR-KFSPEC1 sy-vline 
WA_FPB_VAR_RULES_STR-KFSPEC2 sy-vline 
WA_FPB_VAR_RULES_STR-LIMITABS sy-vline 
WA_FPB_VAR_RULES_STR-WAERS sy-vline 
WA_FPB_VAR_RULES_STR-LIMITREL sy-vline 
WA_FPB_VAR_RULES_STR-LIMITSIGN sy-vline 
WA_FPB_VAR_RULES_STR-EVALDATE sy-vline 
WA_FPB_VAR_RULES_STR-EVALTIME sy-vline 
WA_FPB_VAR_RULES_STR-DISPLAYDATE sy-vline 
WA_FPB_VAR_RULES_STR-UNCHANGEABLE sy-vline 
WA_FPB_VAR_RULES_STR-ADMINRULE sy-vline 
WA_FPB_VAR_RULES_STR-GUID sy-vline 
WA_FPB_VAR_RULES_STR-SHOW_ALERT sy-vline      INTO ld_text SEPARATED BY SPACE.

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