ABAP Select data from SAP table TRDTS_DATA_SUBPOS_DISPLAY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TRDTS_DATA_SUBPOS_DISPLAY
*  INTO TABLE @DATA(IT_TRDTS_DATA_SUBPOS_DISPLAY2).
*--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_TRDTS_DATA_SUBPOS_DISPLAY INDEX 1 INTO DATA(WA_TRDTS_DATA_SUBPOS_DISPLAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TRDTS_DATA_SUBPOS_DISPLAY>-DATA_SOURCE = 1.
<TRDTS_DATA_SUBPOS_DISPLAY>-BUSTRANSID = 1.
<TRDTS_DATA_SUBPOS_DISPLAY>-DATA_SOURCE_T = 1.
<TRDTS_DATA_SUBPOS_DISPLAY>-DATA_EXEC = 1.
<TRDTS_DATA_SUBPOS_DISPLAY>-DATA_EXEC_SYMB = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TRDTS_DATA_SUBPOS_DISPLAY-DATA_EXEC_T, sy-vline,
  WA_TRDTS_DATA_SUBPOS_DISPLAY-TRANS_FLG, sy-vline,
  WA_TRDTS_DATA_SUBPOS_DISPLAY-TRANS_FLG_SYMB, sy-vline,
  WA_TRDTS_DATA_SUBPOS_DISPLAY-TRANS_FLG_T, sy-vline,
  WA_TRDTS_DATA_SUBPOS_DISPLAY-KEY_DATE, sy-vline,
  WA_TRDTS_DATA_SUBPOS_DISPLAY-COMPANY_CODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TRDTS_DATA_SUBPOS_DISPLAY 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_TRDTS_DATA_SUBPOS_DISPLAY 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_TRDTS_DATA_SUBPOS_DISPLAY INTO WA_TRDTS_DATA_SUBPOS_DISPLAY.


*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.

*Conversion exit ALPHA, internal->external for field HREL_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TRDTS_DATA_SUBPOS_DISPLAY-HREL_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRDTS_DATA_SUBPOS_DISPLAY-HREL_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field HREL_FISCAL_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TRDTS_DATA_SUBPOS_DISPLAY-HREL_FISCAL_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRDTS_DATA_SUBPOS_DISPLAY-HREL_FISCAL_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HITEM_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TRDTS_DATA_SUBPOS_DISPLAY-HITEM_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRDTS_DATA_SUBPOS_DISPLAY-HITEM_NUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FISCAL_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_TRDTS_DATA_SUBPOS_DISPLAY-FISCAL_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRDTS_DATA_SUBPOS_DISPLAY-FISCAL_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field HINST_NUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TRDTS_DATA_SUBPOS_DISPLAY-HINST_NUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TRDTS_DATA_SUBPOS_DISPLAY-HINST_NUMBER.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

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

TYPES: BEGIN OF T_TRDTS_DATA_SUBPOS_DISPLAY_STR, 
DATA_SOURCE TYPE STRING,
BUSTRANSID TYPE STRING,
DATA_SOURCE_T TYPE STRING,
DATA_EXEC TYPE STRING,
DATA_EXEC_SYMB TYPE STRING,
DATA_EXEC_T TYPE STRING,
TRANS_FLG TYPE STRING,
TRANS_FLG_SYMB TYPE STRING,
TRANS_FLG_T TYPE STRING,
KEY_DATE TYPE STRING,
COMPANY_CODE TYPE STRING,
COMPANY_CODE_T TYPE STRING,
VALUATION_AREA TYPE STRING,
VALUATION_AREA_T TYPE STRING,
HREL_NUMBER TYPE STRING,
HREL_DESCRIPTION TYPE STRING,
HREL_FISCAL_YEAR TYPE STRING,
HITEM_NUMBER TYPE STRING,
HITEM_DESCRIPTION TYPE STRING,
FISCAL_YEAR TYPE STRING,
HINST_NUMBER TYPE STRING,
HINST_DESCRIPTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TRDTS_DATA_SUBPOS_DISPLAY_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_TRDTS_DATA_SUBPOS_DISPLAY_STR-DATA_SOURCE sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-BUSTRANSID sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-DATA_SOURCE_T sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-DATA_EXEC sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-DATA_EXEC_SYMB sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-DATA_EXEC_T sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-TRANS_FLG sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-TRANS_FLG_SYMB sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-TRANS_FLG_T sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-KEY_DATE sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-COMPANY_CODE sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-COMPANY_CODE_T sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-VALUATION_AREA sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-VALUATION_AREA_T sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-HREL_NUMBER sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-HREL_DESCRIPTION sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-HREL_FISCAL_YEAR sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-HITEM_NUMBER sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-HITEM_DESCRIPTION sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-FISCAL_YEAR sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-HINST_NUMBER sy-vline 
WA_TRDTS_DATA_SUBPOS_DISPLAY_STR-HINST_DESCRIPTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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