ABAP Select data from SAP table CRMS_WFD_ASSIGNMENT_MAIN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CRMS_WFD_ASSIGNMENT_MAIN
*  INTO TABLE @DATA(IT_CRMS_WFD_ASSIGNMENT_MAIN2).
*--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_CRMS_WFD_ASSIGNMENT_MAIN INDEX 1 INTO DATA(WA_CRMS_WFD_ASSIGNMENT_MAIN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CRMS_WFD_ASSIGNMENT_MAIN>-ASGN_GUID = 1.
<CRMS_WFD_ASSIGNMENT_MAIN>-ITEM_GUID = 1.
<CRMS_WFD_ASSIGNMENT_MAIN>-RES_GUID = 1.
<CRMS_WFD_ASSIGNMENT_MAIN>-ASSIGNMENT_NOTE = 1.
<CRMS_WFD_ASSIGNMENT_MAIN>-BEG_TSTMP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CRMS_WFD_ASSIGNMENT_MAIN-END_TSTMP, sy-vline,
  WA_CRMS_WFD_ASSIGNMENT_MAIN-DURATION, sy-vline,
  WA_CRMS_WFD_ASSIGNMENT_MAIN-PARENT_KEY, sy-vline,
  WA_CRMS_WFD_ASSIGNMENT_MAIN-ROOT_KEY, sy-vline,
  WA_CRMS_WFD_ASSIGNMENT_MAIN-BOOKING_TYPE, sy-vline,
  WA_CRMS_WFD_ASSIGNMENT_MAIN-CONCRETE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CRMS_WFD_ASSIGNMENT_MAIN 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_CRMS_WFD_ASSIGNMENT_MAIN 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_CRMS_WFD_ASSIGNMENT_MAIN INTO WA_CRMS_WFD_ASSIGNMENT_MAIN.


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

*Conversion exit ALPHA, internal->external for field CHANGED_LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_CRMS_WFD_ASSIGNMENT_MAIN-CHANGED_LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CRMS_WFD_ASSIGNMENT_MAIN-CHANGED_LOGSYS.
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_CRMS_WFD_ASSIGNMENT_MAIN_STR, 
ASGN_GUID TYPE STRING,
ITEM_GUID TYPE STRING,
RES_GUID TYPE STRING,
ASSIGNMENT_NOTE TYPE STRING,
BEG_TSTMP TYPE STRING,
END_TSTMP TYPE STRING,
DURATION TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
BOOKING_TYPE TYPE STRING,
CONCRETE TYPE STRING,
WTIME_BASED TYPE STRING,
RULE_BASED TYPE STRING,
APPL_STATUS TYPE STRING,
DESCRIPTION TYPE STRING,
REMAINING_DURATION TYPE STRING,
WORK_ISOCODE_UNIT TYPE STRING,
REFINED TYPE STRING,
CREATED_BY TYPE STRING,
CREATED_AWTYP TYPE STRING,
CREATED_LOGSYS TYPE STRING,
CREATED TYPE STRING,
CHANGED_BY TYPE STRING,
CHANGED TYPE STRING,
CHANGED_AWTYP TYPE STRING,
CHANGED_LOGSYS TYPE STRING,
RES_UTIL_RATIO TYPE STRING,
RES_UTIL_RATIO_ORIGIN TYPE STRING,
RES_TYPE TYPE STRING,
SEND_GW_MESSAGE TYPE STRING,
GROUPWARE_SEND_ALLOWED TYPE STRING,
GROUPWARE_SENT TYPE STRING,
GROUPWARE_DESCRIPTION TYPE STRING,
DAILY_REC_START TYPE STRING,
DAILY_REC_END TYPE STRING,
DAYS TYPE STRING,
WEEKLY_REC_START TYPE STRING,
WEEKLY_REC_END TYPE STRING,
WEEKS TYPE STRING,
MONDAY TYPE STRING,
TUESDAY TYPE STRING,
WEDNESDAY TYPE STRING,
THURSDAY TYPE STRING,
FRIDAY TYPE STRING,
SATURDAY TYPE STRING,
SUNDAY TYPE STRING,
MONTHLY_REC_START TYPE STRING,
MONTHLY_REC_END TYPE STRING,
VARIANT TYPE STRING,
M1_DAY TYPE STRING,
M1_MONTH TYPE STRING,
M3_DAY_NR TYPE STRING,
M3_WEEKDAY_NR TYPE STRING,
M3_MONTHS TYPE STRING,
BEG_TIME TYPE STRING,
END_TIME TYPE STRING,
RULE_ZONLO TYPE STRING,
RECURRENCE_TYPE TYPE STRING,
CANDIDATE_ACTION TYPE STRING,
IS_ASSIGNMENT TYPE STRING,
DEMAND_TYPE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CRMS_WFD_ASSIGNMENT_MAIN_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_CRMS_WFD_ASSIGNMENT_MAIN_STR-ASGN_GUID sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-ITEM_GUID sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-RES_GUID sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-ASSIGNMENT_NOTE sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-BEG_TSTMP sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-END_TSTMP sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-DURATION sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-PARENT_KEY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-ROOT_KEY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-BOOKING_TYPE sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CONCRETE sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-WTIME_BASED sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-RULE_BASED sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-APPL_STATUS sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-DESCRIPTION sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-REMAINING_DURATION sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-WORK_ISOCODE_UNIT sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-REFINED sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CREATED_BY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CREATED_AWTYP sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CREATED_LOGSYS sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CREATED sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CHANGED_BY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CHANGED sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CHANGED_AWTYP sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CHANGED_LOGSYS sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-RES_UTIL_RATIO sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-RES_UTIL_RATIO_ORIGIN sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-RES_TYPE sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-SEND_GW_MESSAGE sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-GROUPWARE_SEND_ALLOWED sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-GROUPWARE_SENT sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-GROUPWARE_DESCRIPTION sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-DAILY_REC_START sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-DAILY_REC_END sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-DAYS sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-WEEKLY_REC_START sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-WEEKLY_REC_END sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-WEEKS sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-MONDAY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-TUESDAY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-WEDNESDAY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-THURSDAY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-FRIDAY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-SATURDAY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-SUNDAY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-MONTHLY_REC_START sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-MONTHLY_REC_END sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-VARIANT sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-M1_DAY sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-M1_MONTH sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-M3_DAY_NR sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-M3_WEEKDAY_NR sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-M3_MONTHS sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-BEG_TIME sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-END_TIME sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-RULE_ZONLO sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-RECURRENCE_TYPE sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-CANDIDATE_ACTION sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-IS_ASSIGNMENT sy-vline 
WA_CRMS_WFD_ASSIGNMENT_MAIN_STR-DEMAND_TYPE sy-vline      INTO ld_text SEPARATED BY SPACE.

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