ABAP Select data from SAP table TCDRP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCDRP
*  INTO TABLE @DATA(IT_TCDRP2).
*--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_TCDRP INDEX 1 INTO DATA(WA_TCDRP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCDRP>-OBJECT = 1.
<TCDRP>-REPORTNAME = 1.
<TCDRP>-AUTHOR = 1.
<TCDRP>-UPDNAME = 1.
<TCDRP>-DATUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TCDRP-UZEIT, sy-vline,
  WA_TCDRP-TEXTCASE, sy-vline,
  WA_TCDRP-ARBGEB, sy-vline,
  WA_TCDRP-FEHLERNR, sy-vline,
  WA_TCDRP-FGRP, sy-vline,
  WA_TCDRP-PREFIX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TCDRP 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_TCDRP 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_TCDRP INTO WA_TCDRP.


*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 OBJECT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCDRP-OBJECT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCDRP-OBJECT.
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_TCDRP_STR, 
OBJECT TYPE STRING,
REPORTNAME TYPE STRING,
AUTHOR TYPE STRING,
UPDNAME TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
TEXTCASE TYPE STRING,
ARBGEB TYPE STRING,
FEHLERNR TYPE STRING,
FGRP TYPE STRING,
PREFIX TYPE STRING,
DEVCLASS TYPE STRING,
UPDATE_FLG TYPE STRING,
DATAGEN TYPE STRING,
ABAP_LANGUAGE_VERSION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TCDRP_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_TCDRP_STR-OBJECT sy-vline 
WA_TCDRP_STR-REPORTNAME sy-vline 
WA_TCDRP_STR-AUTHOR sy-vline 
WA_TCDRP_STR-UPDNAME sy-vline 
WA_TCDRP_STR-DATUM sy-vline 
WA_TCDRP_STR-UZEIT sy-vline 
WA_TCDRP_STR-TEXTCASE sy-vline 
WA_TCDRP_STR-ARBGEB sy-vline 
WA_TCDRP_STR-FEHLERNR sy-vline 
WA_TCDRP_STR-FGRP sy-vline 
WA_TCDRP_STR-PREFIX sy-vline 
WA_TCDRP_STR-DEVCLASS sy-vline 
WA_TCDRP_STR-UPDATE_FLG sy-vline 
WA_TCDRP_STR-DATAGEN sy-vline 
WA_TCDRP_STR-ABAP_LANGUAGE_VERSION sy-vline      INTO ld_text SEPARATED BY SPACE.

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