ABAP Select data from SAP table BUCC_RULE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BUCC_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 BUCC_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 BUCC_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_BUCC_RULE TYPE STANDARD TABLE OF BUCC_RULE,
      WA_BUCC_RULE TYPE BUCC_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: <BUCC_RULE> TYPE BUCC_RULE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BUCC_RULE
*  INTO TABLE @DATA(IT_BUCC_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_BUCC_RULE INDEX 1 INTO DATA(WA_BUCC_RULE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BUCC_RULE>-CLIENT = 1.
<BUCC_RULE>-APPLIC = 1.
<BUCC_RULE>-LIBRARY = 1.
<BUCC_RULE>-CHECKTYPE = 1.
<BUCC_RULE>-CHECKRULE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BUCC_RULE-CRTUSER, sy-vline,
  WA_BUCC_RULE-CRTDATE, sy-vline,
  WA_BUCC_RULE-CRTTIME, sy-vline,
  WA_BUCC_RULE-CHGUSER, sy-vline,
  WA_BUCC_RULE-CHGDATE, sy-vline,
  WA_BUCC_RULE-CHGTIME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BUCC_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_BUCC_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_BUCC_RULE INTO WA_BUCC_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_BUCC_RULE_STR, 
CLIENT TYPE STRING,
APPLIC TYPE STRING,
LIBRARY TYPE STRING,
CHECKTYPE TYPE STRING,
CHECKRULE TYPE STRING,
CRTUSER TYPE STRING,
CRTDATE TYPE STRING,
CRTTIME TYPE STRING,
CHGUSER TYPE STRING,
CHGDATE TYPE STRING,
CHGTIME TYPE STRING,
ACTIVE TYPE STRING,
FUND TYPE STRING,
BUDGET_PD TYPE STRING,
FUNDSCTR TYPE STRING,
CMMTITEM TYPE STRING,
FUNCAREA TYPE STRING,
GRANT_NBR TYPE STRING,
MEASURE TYPE STRING,
USERDIM TYPE STRING,
OPERATOR TYPE STRING,
TOL_TYPE TYPE STRING,
TOL_AMOUNT TYPE STRING,
TOL_PERCENT TYPE STRING,
FORMULA_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BUCC_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_BUCC_RULE_STR-CLIENT sy-vline 
WA_BUCC_RULE_STR-APPLIC sy-vline 
WA_BUCC_RULE_STR-LIBRARY sy-vline 
WA_BUCC_RULE_STR-CHECKTYPE sy-vline 
WA_BUCC_RULE_STR-CHECKRULE sy-vline 
WA_BUCC_RULE_STR-CRTUSER sy-vline 
WA_BUCC_RULE_STR-CRTDATE sy-vline 
WA_BUCC_RULE_STR-CRTTIME sy-vline 
WA_BUCC_RULE_STR-CHGUSER sy-vline 
WA_BUCC_RULE_STR-CHGDATE sy-vline 
WA_BUCC_RULE_STR-CHGTIME sy-vline 
WA_BUCC_RULE_STR-ACTIVE sy-vline 
WA_BUCC_RULE_STR-FUND sy-vline 
WA_BUCC_RULE_STR-BUDGET_PD sy-vline 
WA_BUCC_RULE_STR-FUNDSCTR sy-vline 
WA_BUCC_RULE_STR-CMMTITEM sy-vline 
WA_BUCC_RULE_STR-FUNCAREA sy-vline 
WA_BUCC_RULE_STR-GRANT_NBR sy-vline 
WA_BUCC_RULE_STR-MEASURE sy-vline 
WA_BUCC_RULE_STR-USERDIM sy-vline 
WA_BUCC_RULE_STR-OPERATOR sy-vline 
WA_BUCC_RULE_STR-TOL_TYPE sy-vline 
WA_BUCC_RULE_STR-TOL_AMOUNT sy-vline 
WA_BUCC_RULE_STR-TOL_PERCENT sy-vline 
WA_BUCC_RULE_STR-FORMULA_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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