ABAP Select data from SAP table CNVCDMCCA_EXITS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVCDMCCA_EXITS
*  INTO TABLE @DATA(IT_CNVCDMCCA_EXITS2).
*--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_CNVCDMCCA_EXITS INDEX 1 INTO DATA(WA_CNVCDMCCA_EXITS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVCDMCCA_EXITS>-PROJ_ID = 1.
<CNVCDMCCA_EXITS>-SYSID = 1.
<CNVCDMCCA_EXITS>-PGMNA = 1.
<CNVCDMCCA_EXITS>-TCODE = 1.
<CNVCDMCCA_EXITS>-FUNCNAME = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVCDMCCA_EXITS-CUAPROG, sy-vline,
  WA_CNVCDMCCA_EXITS-CUAFUN, sy-vline,
  WA_CNVCDMCCA_EXITS-GDYNPROG, sy-vline,
  WA_CNVCDMCCA_EXITS-GDYNNR, sy-vline,
  WA_CNVCDMCCA_EXITS-BERNAME, sy-vline,
  WA_CNVCDMCCA_EXITS-CDYNPROG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVCDMCCA_EXITS 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_CNVCDMCCA_EXITS 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_CNVCDMCCA_EXITS INTO WA_CNVCDMCCA_EXITS.


*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 PROJ_ID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CNVCDMCCA_EXITS-PROJ_ID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNVCDMCCA_EXITS-PROJ_ID.
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_CNVCDMCCA_EXITS_STR, 
PROJ_ID TYPE STRING,
SYSID TYPE STRING,
PGMNA TYPE STRING,
TCODE TYPE STRING,
FUNCNAME TYPE STRING,
CUAPROG TYPE STRING,
CUAFUN TYPE STRING,
GDYNPROG TYPE STRING,
GDYNNR TYPE STRING,
BERNAME TYPE STRING,
CDYNPROG TYPE STRING,
CDYNNR TYPE STRING,
TNAME TYPE STRING,
CMODPROJ TYPE STRING,
MEMBER TYPE STRING,
MEMTYPE TYPE STRING,
PRSTATUS TYPE STRING,
STATUS TYPE STRING,
IMPLEMENTED TYPE STRING,
IS_USED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVCDMCCA_EXITS_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_CNVCDMCCA_EXITS_STR-PROJ_ID sy-vline 
WA_CNVCDMCCA_EXITS_STR-SYSID sy-vline 
WA_CNVCDMCCA_EXITS_STR-PGMNA sy-vline 
WA_CNVCDMCCA_EXITS_STR-TCODE sy-vline 
WA_CNVCDMCCA_EXITS_STR-FUNCNAME sy-vline 
WA_CNVCDMCCA_EXITS_STR-CUAPROG sy-vline 
WA_CNVCDMCCA_EXITS_STR-CUAFUN sy-vline 
WA_CNVCDMCCA_EXITS_STR-GDYNPROG sy-vline 
WA_CNVCDMCCA_EXITS_STR-GDYNNR sy-vline 
WA_CNVCDMCCA_EXITS_STR-BERNAME sy-vline 
WA_CNVCDMCCA_EXITS_STR-CDYNPROG sy-vline 
WA_CNVCDMCCA_EXITS_STR-CDYNNR sy-vline 
WA_CNVCDMCCA_EXITS_STR-TNAME sy-vline 
WA_CNVCDMCCA_EXITS_STR-CMODPROJ sy-vline 
WA_CNVCDMCCA_EXITS_STR-MEMBER sy-vline 
WA_CNVCDMCCA_EXITS_STR-MEMTYPE sy-vline 
WA_CNVCDMCCA_EXITS_STR-PRSTATUS sy-vline 
WA_CNVCDMCCA_EXITS_STR-STATUS sy-vline 
WA_CNVCDMCCA_EXITS_STR-IMPLEMENTED sy-vline 
WA_CNVCDMCCA_EXITS_STR-IS_USED sy-vline      INTO ld_text SEPARATED BY SPACE.

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