ABAP Select data from SAP table BUCC_LIB into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BUCC_LIB 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_LIB. 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_LIB 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_LIB TYPE STANDARD TABLE OF BUCC_LIB,
      WA_BUCC_LIB TYPE BUCC_LIB,
      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_LIB> TYPE BUCC_LIB.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BUCC_LIB
*  INTO TABLE @DATA(IT_BUCC_LIB2).
*--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_LIB INDEX 1 INTO DATA(WA_BUCC_LIB2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BUCC_LIB-CRTDATE, sy-vline,
  WA_BUCC_LIB-CRTTIME, sy-vline,
  WA_BUCC_LIB-CHGUSER, sy-vline,
  WA_BUCC_LIB-CHGDATE, sy-vline,
  WA_BUCC_LIB-CHGTIME, sy-vline,
  WA_BUCC_LIB-CURRENCY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BUCC_LIB 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_LIB 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_LIB INTO WA_BUCC_LIB.


*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_LIB_STR, 
CLIENT TYPE STRING,
APPLIC TYPE STRING,
LIBRARY TYPE STRING,
CHECKTYPE TYPE STRING,
CRTUSER TYPE STRING,
CRTDATE TYPE STRING,
CRTTIME TYPE STRING,
CHGUSER TYPE STRING,
CHGDATE TYPE STRING,
CHGTIME TYPE STRING,
CURRENCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BUCC_LIB_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_LIB_STR-CLIENT sy-vline 
WA_BUCC_LIB_STR-APPLIC sy-vline 
WA_BUCC_LIB_STR-LIBRARY sy-vline 
WA_BUCC_LIB_STR-CHECKTYPE sy-vline 
WA_BUCC_LIB_STR-CRTUSER sy-vline 
WA_BUCC_LIB_STR-CRTDATE sy-vline 
WA_BUCC_LIB_STR-CRTTIME sy-vline 
WA_BUCC_LIB_STR-CHGUSER sy-vline 
WA_BUCC_LIB_STR-CHGDATE sy-vline 
WA_BUCC_LIB_STR-CHGTIME sy-vline 
WA_BUCC_LIB_STR-CURRENCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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