ABAP Select data from SAP table /DSD/HH_RAHD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /DSD/HH_RAHD 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 /DSD/HH_RAHD. 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 /DSD/HH_RAHD 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_/DSD/HH_RAHD TYPE STANDARD TABLE OF /DSD/HH_RAHD,
      WA_/DSD/HH_RAHD TYPE /DSD/HH_RAHD,
      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: </DSD/HH_RAHD> TYPE /DSD/HH_RAHD.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /DSD/HH_RAHD
  INTO TABLE IT_/DSD/HH_RAHD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /DSD/HH_RAHD
*  INTO TABLE @DATA(IT_/DSD/HH_RAHD2).
*--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_/DSD/HH_RAHD INDEX 1 INTO DATA(WA_/DSD/HH_RAHD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/DSD/HH_RAHD ASSIGNING </DSD/HH_RAHD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</DSD/HH_RAHD>-CLIENT = 1.
</DSD/HH_RAHD>-TOUR_ID = 1.
</DSD/HH_RAHD>-OBJ_TYP = 1.
</DSD/HH_RAHD>-OBJ_ID = 1.
</DSD/HH_RAHD>-VEHICLE = 1.

ENDLOOP.

LOOP AT IT_/DSD/HH_RAHD INTO WA_/DSD/HH_RAHD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/DSD/HH_RAHD-TRAILER, sy-vline,
  WA_/DSD/HH_RAHD-DRIVER, sy-vline,
  WA_/DSD/HH_RAHD-CODRIVER, sy-vline,
  WA_/DSD/HH_RAHD-CARRIER, sy-vline,
  WA_/DSD/HH_RAHD-PLANT, sy-vline,
  WA_/DSD/HH_RAHD-CHECKOUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/DSD/HH_RAHD 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_/DSD/HH_RAHD 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_/DSD/HH_RAHD INTO WA_/DSD/HH_RAHD.


*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 OBJ_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/DSD/HH_RAHD-OBJ_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/DSD/HH_RAHD-OBJ_ID.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field CARRIER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/DSD/HH_RAHD-CARRIER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/DSD/HH_RAHD-CARRIER.
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_/DSD/HH_RAHD_STR, 
CLIENT TYPE STRING,
TOUR_ID TYPE STRING,
OBJ_TYP TYPE STRING,
OBJ_ID TYPE STRING,
VEHICLE TYPE STRING,
TRAILER TYPE STRING,
DRIVER TYPE STRING,
CODRIVER TYPE STRING,
CARRIER TYPE STRING,
PLANT TYPE STRING,
CHECKOUT TYPE STRING,
CHECKIN TYPE STRING,
PROCSTAT TYPE STRING,
CTRL_DATA TYPE STRING,
TARRECS TYPE STRING,
CURRECS TYPE STRING,
MANREL TYPE STRING,
ORIGIN TYPE STRING,
CREDATE TYPE STRING,
CRETIME TYPE STRING,
CREUSER TYPE STRING,
CNGDATE TYPE STRING,
CNGTIME TYPE STRING,
CNGUSER TYPE STRING,
NOK TYPE STRING,
PRES_PROCSTAT TYPE STRING,
LCDATA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/DSD/HH_RAHD_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_/DSD/HH_RAHD_STR-CLIENT sy-vline 
WA_/DSD/HH_RAHD_STR-TOUR_ID sy-vline 
WA_/DSD/HH_RAHD_STR-OBJ_TYP sy-vline 
WA_/DSD/HH_RAHD_STR-OBJ_ID sy-vline 
WA_/DSD/HH_RAHD_STR-VEHICLE sy-vline 
WA_/DSD/HH_RAHD_STR-TRAILER sy-vline 
WA_/DSD/HH_RAHD_STR-DRIVER sy-vline 
WA_/DSD/HH_RAHD_STR-CODRIVER sy-vline 
WA_/DSD/HH_RAHD_STR-CARRIER sy-vline 
WA_/DSD/HH_RAHD_STR-PLANT sy-vline 
WA_/DSD/HH_RAHD_STR-CHECKOUT sy-vline 
WA_/DSD/HH_RAHD_STR-CHECKIN sy-vline 
WA_/DSD/HH_RAHD_STR-PROCSTAT sy-vline 
WA_/DSD/HH_RAHD_STR-CTRL_DATA sy-vline 
WA_/DSD/HH_RAHD_STR-TARRECS sy-vline 
WA_/DSD/HH_RAHD_STR-CURRECS sy-vline 
WA_/DSD/HH_RAHD_STR-MANREL sy-vline 
WA_/DSD/HH_RAHD_STR-ORIGIN sy-vline 
WA_/DSD/HH_RAHD_STR-CREDATE sy-vline 
WA_/DSD/HH_RAHD_STR-CRETIME sy-vline 
WA_/DSD/HH_RAHD_STR-CREUSER sy-vline 
WA_/DSD/HH_RAHD_STR-CNGDATE sy-vline 
WA_/DSD/HH_RAHD_STR-CNGTIME sy-vline 
WA_/DSD/HH_RAHD_STR-CNGUSER sy-vline 
WA_/DSD/HH_RAHD_STR-NOK sy-vline 
WA_/DSD/HH_RAHD_STR-PRES_PROCSTAT sy-vline 
WA_/DSD/HH_RAHD_STR-LCDATA sy-vline      INTO ld_text SEPARATED BY SPACE.

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