ABAP Select data from SAP table CDMCITMMSG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CDMCITMMSG
*  INTO TABLE @DATA(IT_CDMCITMMSG2).
*--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_CDMCITMMSG INDEX 1 INTO DATA(WA_CDMCITMMSG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CDMCITMMSG>-MANDT = 1.
<CDMCITMMSG>-DATAMIGRATIONPROJECTID = 1.
<CDMCITMMSG>-DATAMIGRATIONOBJECTID = 1.
<CDMCITMMSG>-DATAMIGRATIONSENDERKEY = 1.
<CDMCITMMSG>-DATAMIGRATIONLOGITEMMSG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CDMCITMMSG-DATAMIGRATIONSENDERKEYTXT, sy-vline,
  WA_CDMCITMMSG-DATAMIGRATIONPROJECTDESC, sy-vline,
  WA_CDMCITMMSG-DATAMIGRATIONFILENAME, sy-vline,
  WA_CDMCITMMSG-DATAMIGRATIONLOADINGDATE, sy-vline,
  WA_CDMCITMMSG-SYSTEMMESSAGETYPE, sy-vline,
  WA_CDMCITMMSG-SYSTEMMESSAGEVARIABLE1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CDMCITMMSG 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_CDMCITMMSG 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_CDMCITMMSG INTO WA_CDMCITMMSG.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_CDMCITMMSG_STR, 
MANDT TYPE STRING,
DATAMIGRATIONPROJECTID TYPE STRING,
DATAMIGRATIONOBJECTID TYPE STRING,
DATAMIGRATIONSENDERKEY TYPE STRING,
DATAMIGRATIONLOGITEMMSG TYPE STRING,
DATAMIGRATIONSENDERKEYTXT TYPE STRING,
DATAMIGRATIONPROJECTDESC TYPE STRING,
DATAMIGRATIONFILENAME TYPE STRING,
DATAMIGRATIONLOADINGDATE TYPE STRING,
SYSTEMMESSAGETYPE TYPE STRING,
SYSTEMMESSAGEVARIABLE1 TYPE STRING,
SYSTEMMESSAGEVARIABLE2 TYPE STRING,
SYSTEMMESSAGEVARIABLE3 TYPE STRING,
SYSTEMMESSAGEVARIABLE4 TYPE STRING,
SYSTEMMESSAGETEXT TYPE STRING,
SYSTEMMESSAGECLASS TYPE STRING,
SYSTEMMESSAGENUMBER TYPE STRING,
DATAMIGRATIONOBJECTDESC TYPE STRING,
DATAMIGRATIONSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CDMCITMMSG_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_CDMCITMMSG_STR-MANDT sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONPROJECTID sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONOBJECTID sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONSENDERKEY sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONLOGITEMMSG sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONSENDERKEYTXT sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONPROJECTDESC sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONFILENAME sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONLOADINGDATE sy-vline 
WA_CDMCITMMSG_STR-SYSTEMMESSAGETYPE sy-vline 
WA_CDMCITMMSG_STR-SYSTEMMESSAGEVARIABLE1 sy-vline 
WA_CDMCITMMSG_STR-SYSTEMMESSAGEVARIABLE2 sy-vline 
WA_CDMCITMMSG_STR-SYSTEMMESSAGEVARIABLE3 sy-vline 
WA_CDMCITMMSG_STR-SYSTEMMESSAGEVARIABLE4 sy-vline 
WA_CDMCITMMSG_STR-SYSTEMMESSAGETEXT sy-vline 
WA_CDMCITMMSG_STR-SYSTEMMESSAGECLASS sy-vline 
WA_CDMCITMMSG_STR-SYSTEMMESSAGENUMBER sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONOBJECTDESC sy-vline 
WA_CDMCITMMSG_STR-DATAMIGRATIONSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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