ABAP Select data from SAP table TCEDP21S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TCEDP21S 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 TCEDP21S. 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 TCEDP21S 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_TCEDP21S TYPE STANDARD TABLE OF TCEDP21S,
      WA_TCEDP21S TYPE TCEDP21S,
      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: <TCEDP21S> TYPE TCEDP21S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_TCEDP21S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM TCEDP21S
  INTO TABLE IT_TCEDP21S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TCEDP21S
*  INTO TABLE @DATA(IT_TCEDP21S2).
*--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_TCEDP21S INDEX 1 INTO DATA(WA_TCEDP21S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_TCEDP21S ASSIGNING <TCEDP21S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TCEDP21S>-MANDT = 1.
<TCEDP21S>-SNDPRN = 1.
<TCEDP21S>-SNDPRT = 1.
<TCEDP21S>-SNDPFC = 1.
<TCEDP21S>-MESTYP = 1.

ENDLOOP.

LOOP AT IT_TCEDP21S INTO WA_TCEDP21S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TCEDP21S-MESCOD, sy-vline,
  WA_TCEDP21S-MESFCT, sy-vline,
  WA_TCEDP21S-TEST, sy-vline,
  WA_TCEDP21S-SEL_FLAG, sy-vline,
  WA_TCEDP21S-EVCODE, sy-vline,
  WA_TCEDP21S-SYNCHK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TCEDP21S 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_TCEDP21S 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_TCEDP21S INTO WA_TCEDP21S.


*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 SNDPRN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TCEDP21S-SNDPRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCEDP21S-SNDPRN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit EDIPV, internal->external for field SNDPFC
CALL FUNCTION 'CONVERSION_EXIT_EDIPV_OUTPUT'
  EXPORTING
    input =                      WA_TCEDP21S-SNDPFC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCEDP21S-SNDPFC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field USRLNG
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_TCEDP21S-USRLNG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TCEDP21S-USRLNG.
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_TCEDP21S_STR, 
MANDT TYPE STRING,
SNDPRN TYPE STRING,
SNDPRT TYPE STRING,
SNDPFC TYPE STRING,
MESTYP TYPE STRING,
MESCOD TYPE STRING,
MESFCT TYPE STRING,
TEST TYPE STRING,
SEL_FLAG TYPE STRING,
EVCODE TYPE STRING,
SYNCHK TYPE STRING,
METHOD TYPE STRING,
USRTYP TYPE STRING,
USRKEY TYPE STRING,
USRLNG TYPE STRING,
INMOD TYPE STRING,
DCART TYPE STRING,
ICONTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TCEDP21S_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_TCEDP21S_STR-MANDT sy-vline 
WA_TCEDP21S_STR-SNDPRN sy-vline 
WA_TCEDP21S_STR-SNDPRT sy-vline 
WA_TCEDP21S_STR-SNDPFC sy-vline 
WA_TCEDP21S_STR-MESTYP sy-vline 
WA_TCEDP21S_STR-MESCOD sy-vline 
WA_TCEDP21S_STR-MESFCT sy-vline 
WA_TCEDP21S_STR-TEST sy-vline 
WA_TCEDP21S_STR-SEL_FLAG sy-vline 
WA_TCEDP21S_STR-EVCODE sy-vline 
WA_TCEDP21S_STR-SYNCHK sy-vline 
WA_TCEDP21S_STR-METHOD sy-vline 
WA_TCEDP21S_STR-USRTYP sy-vline 
WA_TCEDP21S_STR-USRKEY sy-vline 
WA_TCEDP21S_STR-USRLNG sy-vline 
WA_TCEDP21S_STR-INMOD sy-vline 
WA_TCEDP21S_STR-DCART sy-vline 
WA_TCEDP21S_STR-ICONTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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