ABAP Select data from SAP table NICMVISIBLEACTY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NICMVISIBLEACTY
*  INTO TABLE @DATA(IT_NICMVISIBLEACTY2).
*--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_NICMVISIBLEACTY INDEX 1 INTO DATA(WA_NICMVISIBLEACTY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NICMVISIBLEACTY>-MANDT = 1.
<NICMVISIBLEACTY>-INVGCSMORDERUUID = 1.
<NICMVISIBLEACTY>-INVGCSMORDERID = 1.
<NICMVISIBLEACTY>-INVGCSMORDERPROCESSTYPE = 1.
<NICMVISIBLEACTY>-INVGCSMORDERDESCRIPTION = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NICMVISIBLEACTY-INVGCSMORDERCATEGORYCODE, sy-vline,
  WA_NICMVISIBLEACTY-INVGCSMACTIVITYCATEGORYCLCODE, sy-vline,
  WA_NICMVISIBLEACTY-INVGCSMMAINEMPLOYEERESPID, sy-vline,
  WA_NICMVISIBLEACTY-INVGCSMACTIVITYLOCATIONDESC, sy-vline,
  WA_NICMVISIBLEACTY-INVGCSMACTIVITYSTATUSCODE, sy-vline,
  WA_NICMVISIBLEACTY-INVGCSMACTIVITYPRIORITYCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NICMVISIBLEACTY 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_NICMVISIBLEACTY 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_NICMVISIBLEACTY INTO WA_NICMVISIBLEACTY.


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

*Conversion exit ALPHA, internal->external for field INVGCSMMAINEMPLOYEERESPID
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NICMVISIBLEACTY-INVGCSMMAINEMPLOYEERESPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NICMVISIBLEACTY-INVGCSMMAINEMPLOYEERESPID.
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_NICMVISIBLEACTY_STR, 
MANDT TYPE STRING,
INVGCSMORDERUUID TYPE STRING,
INVGCSMORDERID TYPE STRING,
INVGCSMORDERPROCESSTYPE TYPE STRING,
INVGCSMORDERDESCRIPTION TYPE STRING,
INVGCSMORDERCATEGORYCODE TYPE STRING,
INVGCSMACTIVITYCATEGORYCLCODE TYPE STRING,
INVGCSMMAINEMPLOYEERESPID TYPE STRING,
INVGCSMACTIVITYLOCATIONDESC TYPE STRING,
INVGCSMACTIVITYSTATUSCODE TYPE STRING,
INVGCSMACTIVITYPRIORITYCODE TYPE STRING,
INVGCSMSECURITYLEVEL TYPE STRING,
INVGCSMACTIVITYSTARTDATE TYPE STRING,
INVGCSMACTIVITYENDDATE TYPE STRING,
INVGCSMACTIVITYSTARTTIME TYPE STRING,
INVGCSMACTIVITYENDTIME TYPE STRING,
TEXTOBJECTKEY TYPE STRING,
BUSINESSUSER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NICMVISIBLEACTY_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_NICMVISIBLEACTY_STR-MANDT sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMORDERUUID sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMORDERID sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMORDERPROCESSTYPE sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMORDERDESCRIPTION sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMORDERCATEGORYCODE sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMACTIVITYCATEGORYCLCODE sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMMAINEMPLOYEERESPID sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMACTIVITYLOCATIONDESC sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMACTIVITYSTATUSCODE sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMACTIVITYPRIORITYCODE sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMSECURITYLEVEL sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMACTIVITYSTARTDATE sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMACTIVITYENDDATE sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMACTIVITYSTARTTIME sy-vline 
WA_NICMVISIBLEACTY_STR-INVGCSMACTIVITYENDTIME sy-vline 
WA_NICMVISIBLEACTY_STR-TEXTOBJECTKEY sy-vline 
WA_NICMVISIBLEACTY_STR-BUSINESSUSER sy-vline      INTO ld_text SEPARATED BY SPACE.

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