ABAP Select data from SAP table CDOC_MYPLM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDOC_MYPLM
*  INTO TABLE @DATA(IT_CDOC_MYPLM2).
*--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_CDOC_MYPLM INDEX 1 INTO DATA(WA_CDOC_MYPLM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDOC_MYPLM>-MANDT = 1.
<CDOC_MYPLM>-MYVER = 1.
<CDOC_MYPLM>-MYKEY = 1.
<CDOC_MYPLM>-MYPOOL = 1.
<CDOC_MYPLM>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDOC_MYPLM-MYPER, sy-vline,
  WA_CDOC_MYPLM-MYWRT, sy-vline,
  WA_CDOC_MYPLM-MYWRN, sy-vline,
  WA_CDOC_MYPLM-MYMNG, sy-vline,
  WA_CDOC_MYPLM-ABS01, sy-vline,
  WA_CDOC_MYPLM-ABS02, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDOC_MYPLM 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_CDOC_MYPLM 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_CDOC_MYPLM INTO WA_CDOC_MYPLM.


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

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CDOC_MYPLM-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CDOC_MYPLM-MEINS.
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_CDOC_MYPLM_STR, 
MANDT TYPE STRING,
MYVER TYPE STRING,
MYKEY TYPE STRING,
MYPOOL TYPE STRING,
GJAHR TYPE STRING,
MYPER TYPE STRING,
MYWRT TYPE STRING,
MYWRN TYPE STRING,
MYMNG TYPE STRING,
ABS01 TYPE STRING,
ABS02 TYPE STRING,
ABS03 TYPE STRING,
MYPIX TYPE STRING,
MEINS TYPE STRING,
MYBAS TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDOC_MYPLM_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_CDOC_MYPLM_STR-MANDT sy-vline 
WA_CDOC_MYPLM_STR-MYVER sy-vline 
WA_CDOC_MYPLM_STR-MYKEY sy-vline 
WA_CDOC_MYPLM_STR-MYPOOL sy-vline 
WA_CDOC_MYPLM_STR-GJAHR sy-vline 
WA_CDOC_MYPLM_STR-MYPER sy-vline 
WA_CDOC_MYPLM_STR-MYWRT sy-vline 
WA_CDOC_MYPLM_STR-MYWRN sy-vline 
WA_CDOC_MYPLM_STR-MYMNG sy-vline 
WA_CDOC_MYPLM_STR-ABS01 sy-vline 
WA_CDOC_MYPLM_STR-ABS02 sy-vline 
WA_CDOC_MYPLM_STR-ABS03 sy-vline 
WA_CDOC_MYPLM_STR-MYPIX sy-vline 
WA_CDOC_MYPLM_STR-MEINS sy-vline 
WA_CDOC_MYPLM_STR-MYBAS sy-vline 
WA_CDOC_MYPLM_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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