ABAP Select data from SAP table NCHGRECREFEBOM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM NCHGRECREFEBOM
*  INTO TABLE @DATA(IT_NCHGRECREFEBOM2).
*--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_NCHGRECREFEBOM INDEX 1 INTO DATA(WA_NCHGRECREFEBOM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<NCHGRECREFEBOM>-MANDT = 1.
<NCHGRECREFEBOM>-CHANGERECORDREFERENCEUUID = 1.
<NCHGRECREFEBOM>-MATERIAL = 1.
<NCHGRECREFEBOM>-PLANT = 1.
<NCHGRECREFEBOM>-BILLOFMATERIALVARIANTUSAGE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_NCHGRECREFEBOM-BILLOFMATERIALVARIANTUSAGEDESC, sy-vline,
  WA_NCHGRECREFEBOM-BILLOFMATERIALVARIANT, sy-vline,
  WA_NCHGRECREFEBOM-BILLOFMATERIALVERSION, sy-vline,
  WA_NCHGRECREFEBOM-CHANGERECORDUUID, sy-vline,
  WA_NCHGRECREFEBOM-CHANGERECORDREFERENCETYPE, sy-vline,
  WA_NCHGRECREFEBOM-CHANGERECORDREFOBJECTUUID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_NCHGRECREFEBOM 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_NCHGRECREFEBOM 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_NCHGRECREFEBOM INTO WA_NCHGRECREFEBOM.


*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 MATN1, internal->external for field MATERIAL
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRECREFEBOM-MATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRECREFEBOM-MATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BILLOFMATERIALVARIANT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRECREFEBOM-BILLOFMATERIALVARIANT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRECREFEBOM-BILLOFMATERIALVARIANT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit NUMCV, internal->external for field BILLOFMATERIAL
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRECREFEBOM-BILLOFMATERIAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRECREFEBOM-BILLOFMATERIAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHANGENUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRECREFEBOM-CHANGENUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRECREFEBOM-CHANGENUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CHANGERECORD
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_NCHGRECREFEBOM-CHANGERECORD
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_NCHGRECREFEBOM-CHANGERECORD.
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_NCHGRECREFEBOM_STR, 
MANDT TYPE STRING,
CHANGERECORDREFERENCEUUID TYPE STRING,
MATERIAL TYPE STRING,
PLANT TYPE STRING,
BILLOFMATERIALVARIANTUSAGE TYPE STRING,
BILLOFMATERIALVARIANTUSAGEDESC TYPE STRING,
BILLOFMATERIALVARIANT TYPE STRING,
BILLOFMATERIALVERSION TYPE STRING,
CHANGERECORDUUID TYPE STRING,
CHANGERECORDREFERENCETYPE TYPE STRING,
CHANGERECORDREFOBJECTUUID TYPE STRING,
PARENTCHANGERECORDREFUUID TYPE STRING,
CHANGERECORDITEMRELEVANCE TYPE STRING,
ENGBOMINCSTATUS TYPE STRING,
BOMVERSIONSTATUS TYPE STRING,
BILLOFMATERIALSTATUS TYPE STRING,
MATERIALNAME TYPE STRING,
CHANGERECORDREFERENCE TYPE STRING,
BILLOFMATERIAL TYPE STRING,
BILLOFMATERIALCATEGORY TYPE STRING,
CHANGENUMBER TYPE STRING,
CREATEDBYUSER TYPE STRING,
CREATIONDATETIME TYPE STRING,
CREATIONDATE TYPE STRING,
LASTCHANGEDBYUSER TYPE STRING,
CHANGERECORD TYPE STRING,
CHANGERECORDTYPE TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
LASTCHANGEDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_NCHGRECREFEBOM_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_NCHGRECREFEBOM_STR-MANDT sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGERECORDREFERENCEUUID sy-vline 
WA_NCHGRECREFEBOM_STR-MATERIAL sy-vline 
WA_NCHGRECREFEBOM_STR-PLANT sy-vline 
WA_NCHGRECREFEBOM_STR-BILLOFMATERIALVARIANTUSAGE sy-vline 
WA_NCHGRECREFEBOM_STR-BILLOFMATERIALVARIANTUSAGEDESC sy-vline 
WA_NCHGRECREFEBOM_STR-BILLOFMATERIALVARIANT sy-vline 
WA_NCHGRECREFEBOM_STR-BILLOFMATERIALVERSION sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGERECORDUUID sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGERECORDREFERENCETYPE sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGERECORDREFOBJECTUUID sy-vline 
WA_NCHGRECREFEBOM_STR-PARENTCHANGERECORDREFUUID sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGERECORDITEMRELEVANCE sy-vline 
WA_NCHGRECREFEBOM_STR-ENGBOMINCSTATUS sy-vline 
WA_NCHGRECREFEBOM_STR-BOMVERSIONSTATUS sy-vline 
WA_NCHGRECREFEBOM_STR-BILLOFMATERIALSTATUS sy-vline 
WA_NCHGRECREFEBOM_STR-MATERIALNAME sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGERECORDREFERENCE sy-vline 
WA_NCHGRECREFEBOM_STR-BILLOFMATERIAL sy-vline 
WA_NCHGRECREFEBOM_STR-BILLOFMATERIALCATEGORY sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGENUMBER sy-vline 
WA_NCHGRECREFEBOM_STR-CREATEDBYUSER sy-vline 
WA_NCHGRECREFEBOM_STR-CREATIONDATETIME sy-vline 
WA_NCHGRECREFEBOM_STR-CREATIONDATE sy-vline 
WA_NCHGRECREFEBOM_STR-LASTCHANGEDBYUSER sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGERECORD sy-vline 
WA_NCHGRECREFEBOM_STR-CHANGERECORDTYPE sy-vline 
WA_NCHGRECREFEBOM_STR-LASTCHANGEDATETIME sy-vline 
WA_NCHGRECREFEBOM_STR-LASTCHANGEDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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