ABAP Select data from SAP table TRBUFFIELD_EXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRBUFFIELD_EXT
*  INTO TABLE @DATA(IT_TRBUFFIELD_EXT2).
*--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_TRBUFFIELD_EXT INDEX 1 INTO DATA(WA_TRBUFFIELD_EXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRBUFFIELD_EXT>-NAME = 1.
<TRBUFFIELD_EXT>-TYPE = 1.
<TRBUFFIELD_EXT>-DECIMALS = 1.
<TRBUFFIELD_EXT>-LENGTH = 1.
<TRBUFFIELD_EXT>-VALUEINT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRBUFFIELD_EXT-VALUETEXT, sy-vline,
  WA_TRBUFFIELD_EXT-VALUERAW, sy-vline,
  WA_TRBUFFIELD_EXT-VALUEFLOAT, sy-vline,
  WA_TRBUFFIELD_EXT-VALUEPCKD, sy-vline,
  WA_TRBUFFIELD_EXT-VALUEINT8, sy-vline,
  WA_TRBUFFIELD_EXT-VALUEDECFLOAT16, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRBUFFIELD_EXT 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_TRBUFFIELD_EXT 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_TRBUFFIELD_EXT INTO WA_TRBUFFIELD_EXT.


*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_TRBUFFIELD_EXT_STR, 
NAME TYPE STRING,
TYPE TYPE STRING,
DECIMALS TYPE STRING,
LENGTH TYPE STRING,
VALUEINT TYPE STRING,
VALUETEXT TYPE STRING,
VALUERAW TYPE STRING,
VALUEFLOAT TYPE STRING,
VALUEPCKD TYPE STRING,
VALUEINT8 TYPE STRING,
VALUEDECFLOAT16 TYPE STRING,
VALUEDECFLOAT34 TYPE STRING,
VALUEUTCLONG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRBUFFIELD_EXT_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_TRBUFFIELD_EXT_STR-NAME sy-vline 
WA_TRBUFFIELD_EXT_STR-TYPE sy-vline 
WA_TRBUFFIELD_EXT_STR-DECIMALS sy-vline 
WA_TRBUFFIELD_EXT_STR-LENGTH sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUEINT sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUETEXT sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUERAW sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUEFLOAT sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUEPCKD sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUEINT8 sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUEDECFLOAT16 sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUEDECFLOAT34 sy-vline 
WA_TRBUFFIELD_EXT_STR-VALUEUTCLONG sy-vline      INTO ld_text SEPARATED BY SPACE.

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