ABAP Select data from SAP table NJIT_CALL_MSGS_D into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NJIT_CALL_MSGS_D
*  INTO TABLE @DATA(IT_NJIT_CALL_MSGS_D2).
*--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_NJIT_CALL_MSGS_D INDEX 1 INTO DATA(WA_NJIT_CALL_MSGS_D2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NJIT_CALL_MSGS_D>-MANDT = 1.
<NJIT_CALL_MSGS_D>-JITBACKFLUSHUUID = 1.
<NJIT_CALL_MSGS_D>-JITHEADERUUID = 1.
<NJIT_CALL_MSGS_D>-JITCALLCOMPONENTUUID = 1.
<NJIT_CALL_MSGS_D>-JITCALLCOMPMATLMESSAGETYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NJIT_CALL_MSGS_D-JITCALLCOMPMATLMESSAGECLASS, sy-vline,
  WA_NJIT_CALL_MSGS_D-JITCALLCOMPMATLMESSAGENUMBER, sy-vline,
  WA_NJIT_CALL_MSGS_D-JITCALLCOMPMATLMESSAGEVALUE1, sy-vline,
  WA_NJIT_CALL_MSGS_D-JITCALLCOMPMATLMESSAGEVALUE2, sy-vline,
  WA_NJIT_CALL_MSGS_D-JITCALLCOMPMATLMESSAGEVALUE3, sy-vline,
  WA_NJIT_CALL_MSGS_D-JITCALLCOMPMATLMESSAGEVALUE4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NJIT_CALL_MSGS_D 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_NJIT_CALL_MSGS_D 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_NJIT_CALL_MSGS_D INTO WA_NJIT_CALL_MSGS_D.


*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_NJIT_CALL_MSGS_D_STR, 
MANDT TYPE STRING,
JITBACKFLUSHUUID TYPE STRING,
JITHEADERUUID TYPE STRING,
JITCALLCOMPONENTUUID TYPE STRING,
JITCALLCOMPMATLMESSAGETYPE TYPE STRING,
JITCALLCOMPMATLMESSAGECLASS TYPE STRING,
JITCALLCOMPMATLMESSAGENUMBER TYPE STRING,
JITCALLCOMPMATLMESSAGEVALUE1 TYPE STRING,
JITCALLCOMPMATLMESSAGEVALUE2 TYPE STRING,
JITCALLCOMPMATLMESSAGEVALUE3 TYPE STRING,
JITCALLCOMPMATLMESSAGEVALUE4 TYPE STRING,
DRAFTENTITYCREATIONDATETIME TYPE STRING,
DRAFTENTITYLASTCHANGEDATETIME TYPE STRING,
DRAFTADMINISTRATIVEDATAUUID TYPE STRING,
DRAFTENTITYOPERATIONCODE TYPE STRING,
HASACTIVEENTITY TYPE STRING,
DRAFTFIELDCHANGES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NJIT_CALL_MSGS_D_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_NJIT_CALL_MSGS_D_STR-MANDT sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITBACKFLUSHUUID sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITHEADERUUID sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITCALLCOMPONENTUUID sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITCALLCOMPMATLMESSAGETYPE sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITCALLCOMPMATLMESSAGECLASS sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITCALLCOMPMATLMESSAGENUMBER sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITCALLCOMPMATLMESSAGEVALUE1 sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITCALLCOMPMATLMESSAGEVALUE2 sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITCALLCOMPMATLMESSAGEVALUE3 sy-vline 
WA_NJIT_CALL_MSGS_D_STR-JITCALLCOMPMATLMESSAGEVALUE4 sy-vline 
WA_NJIT_CALL_MSGS_D_STR-DRAFTENTITYCREATIONDATETIME sy-vline 
WA_NJIT_CALL_MSGS_D_STR-DRAFTENTITYLASTCHANGEDATETIME sy-vline 
WA_NJIT_CALL_MSGS_D_STR-DRAFTADMINISTRATIVEDATAUUID sy-vline 
WA_NJIT_CALL_MSGS_D_STR-DRAFTENTITYOPERATIONCODE sy-vline 
WA_NJIT_CALL_MSGS_D_STR-HASACTIVEENTITY sy-vline 
WA_NJIT_CALL_MSGS_D_STR-DRAFTFIELDCHANGES sy-vline      INTO ld_text SEPARATED BY SPACE.

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