ABAP Select data from SAP table IECNOMR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IECNOMR
*  INTO TABLE @DATA(IT_IECNOMR2).
*--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_IECNOMR INDEX 1 INTO DATA(WA_IECNOMR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IECNOMR>-MANDT = 1.
<IECNOMR>-CHANGENUMBER = 1.
<IECNOMR>-CHANGENUMBEROBJECTTYPE = 1.
<IECNOMR>-OBJMGMTRECDOBJECTINTERNALID = 1.
<IECNOMR>-OBJMGMTRECDOBJECT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IECNOMR-CHGNMBRALTERNATIVEDATECOUNTER, sy-vline,
  WA_IECNOMR-OBJMGMTRECDDESCRIPTION, sy-vline,
  WA_IECNOMR-OBJMGMTRECDITEMUUID, sy-vline,
  WA_IECNOMR-OBJMGMTRECDLASTCHANGEDAT, sy-vline,
  WA_IECNOMR-OBJMGMTRECDLASTCHANGEDBY, sy-vline,
  WA_IECNOMR-OBJMGMTRECDCREATIONDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IECNOMR 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_IECNOMR 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_IECNOMR INTO WA_IECNOMR.


*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 CHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IECNOMR-CHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IECNOMR-CHANGENUMBER.
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_IECNOMR_STR, 
MANDT TYPE STRING,
CHANGENUMBER TYPE STRING,
CHANGENUMBEROBJECTTYPE TYPE STRING,
OBJMGMTRECDOBJECTINTERNALID TYPE STRING,
OBJMGMTRECDOBJECT TYPE STRING,
CHGNMBRALTERNATIVEDATECOUNTER TYPE STRING,
OBJMGMTRECDDESCRIPTION TYPE STRING,
OBJMGMTRECDITEMUUID TYPE STRING,
OBJMGMTRECDLASTCHANGEDAT TYPE STRING,
OBJMGMTRECDLASTCHANGEDBY TYPE STRING,
OBJMGMTRECDCREATIONDATE TYPE STRING,
OBJMGMTRECDCREATEDBY TYPE STRING,
OBJMGMTRECDOBJLASTCHANGEDAT TYPE STRING,
OBJMGMTRECDOBJLASTCHANGEDBY TYPE STRING,
OBJMGMTRECDOBJISLOCKEDFORCHG TYPE STRING,
OBJMGMTRECDOBJISBASELINED TYPE STRING,
OBJMGMTRECDCHANGETYPE TYPE STRING,
OBJMGMTRECDOBJISPLANNED TYPE STRING,
OBJMGMTRECDOBJREVISIONLEVEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IECNOMR_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_IECNOMR_STR-MANDT sy-vline 
WA_IECNOMR_STR-CHANGENUMBER sy-vline 
WA_IECNOMR_STR-CHANGENUMBEROBJECTTYPE sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDOBJECTINTERNALID sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDOBJECT sy-vline 
WA_IECNOMR_STR-CHGNMBRALTERNATIVEDATECOUNTER sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDDESCRIPTION sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDITEMUUID sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDLASTCHANGEDAT sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDLASTCHANGEDBY sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDCREATIONDATE sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDCREATEDBY sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDOBJLASTCHANGEDAT sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDOBJLASTCHANGEDBY sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDOBJISLOCKEDFORCHG sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDOBJISBASELINED sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDCHANGETYPE sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDOBJISPLANNED sy-vline 
WA_IECNOMR_STR-OBJMGMTRECDOBJREVISIONLEVEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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