ABAP Select data from SAP table CNMASS_WBS_MILESTONE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNMASS_WBS_MILESTONE
*  INTO TABLE @DATA(IT_CNMASS_WBS_MILESTONE2).
*--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_CNMASS_WBS_MILESTONE INDEX 1 INTO DATA(WA_CNMASS_WBS_MILESTONE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNMASS_WBS_MILESTONE>-MILESTONE_NUMBER = 1.
<CNMASS_WBS_MILESTONE>-WBS_ELEMENT = 1.
<CNMASS_WBS_MILESTONE>-MILESTONE_USAGE = 1.
<CNMASS_WBS_MILESTONE>-DESCRIPTION = 1.
<CNMASS_WBS_MILESTONE>-SCHED_MILESTONE_DATE_BASIC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNMASS_WBS_MILESTONE-SCHED_MILESTONE_TIME_BASIC, sy-vline,
  WA_CNMASS_WBS_MILESTONE-SCHED_MILESTONE_DATE_FORECAST, sy-vline,
  WA_CNMASS_WBS_MILESTONE-SCHED_MILESTONE_TIME_FORECAST, sy-vline,
  WA_CNMASS_WBS_MILESTONE-FIXED_MILESTONE_DATE_BASIC, sy-vline,
  WA_CNMASS_WBS_MILESTONE-FIXED_MILESTONE_TIME_BASIC, sy-vline,
  WA_CNMASS_WBS_MILESTONE-FIXED_MILESTONE_DATE_FORECAST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNMASS_WBS_MILESTONE 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_CNMASS_WBS_MILESTONE 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_CNMASS_WBS_MILESTONE INTO WA_CNMASS_WBS_MILESTONE.


*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 ABPSN, internal->external for field WBS_ELEMENT
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNMASS_WBS_MILESTONE-WBS_ELEMENT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMASS_WBS_MILESTONE-WBS_ELEMENT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field OFFSET_MILESTONE_DATE_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_CNMASS_WBS_MILESTONE-OFFSET_MILESTONE_DATE_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMASS_WBS_MILESTONE-OFFSET_MILESTONE_DATE_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field PROJECT_DEFINITION
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_CNMASS_WBS_MILESTONE-PROJECT_DEFINITION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNMASS_WBS_MILESTONE-PROJECT_DEFINITION.
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_CNMASS_WBS_MILESTONE_STR, 
MILESTONE_NUMBER TYPE STRING,
WBS_ELEMENT TYPE STRING,
MILESTONE_USAGE TYPE STRING,
DESCRIPTION TYPE STRING,
SCHED_MILESTONE_DATE_BASIC TYPE STRING,
SCHED_MILESTONE_TIME_BASIC TYPE STRING,
SCHED_MILESTONE_DATE_FORECAST TYPE STRING,
SCHED_MILESTONE_TIME_FORECAST TYPE STRING,
FIXED_MILESTONE_DATE_BASIC TYPE STRING,
FIXED_MILESTONE_TIME_BASIC TYPE STRING,
FIXED_MILESTONE_DATE_FORECAST TYPE STRING,
FIXED_MILESTONE_TIME_FORECAST TYPE STRING,
ACTUAL_DATE TYPE STRING,
ACTUAL_TIME TYPE STRING,
LATEST_DATES_INDICATOR TYPE STRING,
OFFSET_START_END_INDICATOR TYPE STRING,
OFFSET_MILESTONE_DATE TYPE STRING,
OFFSET_MILESTONE_DATE_UNIT TYPE STRING,
OFFSET_MILESTONE_DATE_UNIT_ISO TYPE STRING,
OFFSET_PERCENTAGE TYPE STRING,
TREND_ANALYSIS_INDICATOR TYPE STRING,
EARNED_VALUE_INDICATOR TYPE STRING,
PERCENTAGE_OF_COMPLETION TYPE STRING,
SALES_DOC_DATE_INIDICATOR TYPE STRING,
INVOICE_PERCENTAGE TYPE STRING,
PROJECT_DEFINITION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNMASS_WBS_MILESTONE_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_CNMASS_WBS_MILESTONE_STR-MILESTONE_NUMBER sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-WBS_ELEMENT sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-MILESTONE_USAGE sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-DESCRIPTION sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-SCHED_MILESTONE_DATE_BASIC sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-SCHED_MILESTONE_TIME_BASIC sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-SCHED_MILESTONE_DATE_FORECAST sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-SCHED_MILESTONE_TIME_FORECAST sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-FIXED_MILESTONE_DATE_BASIC sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-FIXED_MILESTONE_TIME_BASIC sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-FIXED_MILESTONE_DATE_FORECAST sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-FIXED_MILESTONE_TIME_FORECAST sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-ACTUAL_DATE sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-ACTUAL_TIME sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-LATEST_DATES_INDICATOR sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-OFFSET_START_END_INDICATOR sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-OFFSET_MILESTONE_DATE sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-OFFSET_MILESTONE_DATE_UNIT sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-OFFSET_MILESTONE_DATE_UNIT_ISO sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-OFFSET_PERCENTAGE sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-TREND_ANALYSIS_INDICATOR sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-EARNED_VALUE_INDICATOR sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-PERCENTAGE_OF_COMPLETION sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-SALES_DOC_DATE_INIDICATOR sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-INVOICE_PERCENTAGE sy-vline 
WA_CNMASS_WBS_MILESTONE_STR-PROJECT_DEFINITION sy-vline      INTO ld_text SEPARATED BY SPACE.

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