ABAP Select data from SAP table WFDBPC_RULE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP WFDBPC_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 WFDBPC_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 WFDBPC_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_WFDBPC_RULE TYPE STANDARD TABLE OF WFDBPC_RULE,
      WA_WFDBPC_RULE TYPE WFDBPC_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: <WFDBPC_RULE> TYPE WFDBPC_RULE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM WFDBPC_RULE
*  INTO TABLE @DATA(IT_WFDBPC_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_WFDBPC_RULE INDEX 1 INTO DATA(WA_WFDBPC_RULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<WFDBPC_RULE>-MANDT = 1.
<WFDBPC_RULE>-TEMPLATE_KEY = 1.
<WFDBPC_RULE>-RULE_ID = 1.
<WFDBPC_RULE>-TIMESPECTYPE = 1.
<WFDBPC_RULE>-RULE_TYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_WFDBPC_RULE-FACTORY_CALENDAR, sy-vline,
  WA_WFDBPC_RULE-START_DATE, sy-vline,
  WA_WFDBPC_RULE-END_DATE, sy-vline,
  WA_WFDBPC_RULE-TIME_FROM, sy-vline,
  WA_WFDBPC_RULE-TIME_TO, sy-vline,
  WA_WFDBPC_RULE-TZONE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_WFDBPC_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_WFDBPC_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_WFDBPC_RULE INTO WA_WFDBPC_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.
ENDFORM. 

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

TYPES: BEGIN OF T_WFDBPC_RULE_STR, 
MANDT TYPE STRING,
TEMPLATE_KEY TYPE STRING,
RULE_ID TYPE STRING,
TIMESPECTYPE TYPE STRING,
RULE_TYPE TYPE STRING,
FACTORY_CALENDAR TYPE STRING,
START_DATE TYPE STRING,
END_DATE TYPE STRING,
TIME_FROM TYPE STRING,
TIME_TO TYPE STRING,
TZONE TYPE STRING,
WEEKS TYPE STRING,
MONDAY TYPE STRING,
TUESDAY TYPE STRING,
WEDNESDAY TYPE STRING,
THURSDAY TYPE STRING,
FRIDAY TYPE STRING,
SATURDAY TYPE STRING,
SUNDAY TYPE STRING,
R_DAYS TYPE STRING,
R_MONTH TYPE STRING,
DAY_NR TYPE STRING,
WEEKDAY_NR TYPE STRING,
R_MONTHS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_WFDBPC_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_WFDBPC_RULE_STR-MANDT sy-vline 
WA_WFDBPC_RULE_STR-TEMPLATE_KEY sy-vline 
WA_WFDBPC_RULE_STR-RULE_ID sy-vline 
WA_WFDBPC_RULE_STR-TIMESPECTYPE sy-vline 
WA_WFDBPC_RULE_STR-RULE_TYPE sy-vline 
WA_WFDBPC_RULE_STR-FACTORY_CALENDAR sy-vline 
WA_WFDBPC_RULE_STR-START_DATE sy-vline 
WA_WFDBPC_RULE_STR-END_DATE sy-vline 
WA_WFDBPC_RULE_STR-TIME_FROM sy-vline 
WA_WFDBPC_RULE_STR-TIME_TO sy-vline 
WA_WFDBPC_RULE_STR-TZONE sy-vline 
WA_WFDBPC_RULE_STR-WEEKS sy-vline 
WA_WFDBPC_RULE_STR-MONDAY sy-vline 
WA_WFDBPC_RULE_STR-TUESDAY sy-vline 
WA_WFDBPC_RULE_STR-WEDNESDAY sy-vline 
WA_WFDBPC_RULE_STR-THURSDAY sy-vline 
WA_WFDBPC_RULE_STR-FRIDAY sy-vline 
WA_WFDBPC_RULE_STR-SATURDAY sy-vline 
WA_WFDBPC_RULE_STR-SUNDAY sy-vline 
WA_WFDBPC_RULE_STR-R_DAYS sy-vline 
WA_WFDBPC_RULE_STR-R_MONTH sy-vline 
WA_WFDBPC_RULE_STR-DAY_NR sy-vline 
WA_WFDBPC_RULE_STR-WEEKDAY_NR sy-vline 
WA_WFDBPC_RULE_STR-R_MONTHS sy-vline      INTO ld_text SEPARATED BY SPACE.

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