ABAP Select data from SAP table TBZ3R_C into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TBZ3R_C 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 TBZ3R_C. 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 TBZ3R_C 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_TBZ3R_C TYPE STANDARD TABLE OF TBZ3R_C,
      WA_TBZ3R_C TYPE TBZ3R_C,
      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: <TBZ3R_C> TYPE TBZ3R_C.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TBZ3R_C.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TBZ3R_C
  INTO TABLE IT_TBZ3R_C.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TBZ3R_C
*  INTO TABLE @DATA(IT_TBZ3R_C2).
*--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_TBZ3R_C INDEX 1 INTO DATA(WA_TBZ3R_C2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TBZ3R_C ASSIGNING <TBZ3R_C>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TBZ3R_C>-CLIENT = 1.
<TBZ3R_C>-OBJAP = 1.
<TBZ3R_C>-TABNM = 1.
<TBZ3R_C>-FLDNM = 1.
<TBZ3R_C>-FLDGR = 1.

ENDLOOP.

LOOP AT IT_TBZ3R_C INTO WA_TBZ3R_C.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TBZ3R_C-XINPT, sy-vline,
  WA_TBZ3R_C-INDEXNAME, sy-vline,
  WA_TBZ3R_C-INDEXPOS, sy-vline,
  WA_TBZ3R_C-SELECTIVITY, sy-vline,
  WA_TBZ3R_C-XHITLIST, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_TBZ3R_C 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_TBZ3R_C 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_TBZ3R_C INTO WA_TBZ3R_C.


*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_TBZ3R_C_STR, 
CLIENT TYPE STRING,
OBJAP TYPE STRING,
TABNM TYPE STRING,
FLDNM TYPE STRING,
FLDGR TYPE STRING,
XINPT TYPE STRING,
INDEXNAME TYPE STRING,
INDEXPOS TYPE STRING,
SELECTIVITY TYPE STRING,
XHITLIST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TBZ3R_C_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_TBZ3R_C_STR-CLIENT sy-vline 
WA_TBZ3R_C_STR-OBJAP sy-vline 
WA_TBZ3R_C_STR-TABNM sy-vline 
WA_TBZ3R_C_STR-FLDNM sy-vline 
WA_TBZ3R_C_STR-FLDGR sy-vline 
WA_TBZ3R_C_STR-XINPT sy-vline 
WA_TBZ3R_C_STR-INDEXNAME sy-vline 
WA_TBZ3R_C_STR-INDEXPOS sy-vline 
WA_TBZ3R_C_STR-SELECTIVITY sy-vline 
WA_TBZ3R_C_STR-XHITLIST sy-vline      INTO ld_text SEPARATED BY SPACE.

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