ABAP Select data from SAP table CNV_NCE_NRIV_MAP_STRUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNV_NCE_NRIV_MAP_STRUC
*  INTO TABLE @DATA(IT_CNV_NCE_NRIV_MAP_STRUC2).
*--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_CNV_NCE_NRIV_MAP_STRUC INDEX 1 INTO DATA(WA_CNV_NCE_NRIV_MAP_STRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNV_NCE_NRIV_MAP_STRUC>-OBJECT = 1.
<CNV_NCE_NRIV_MAP_STRUC>-SUBOBJECT = 1.
<CNV_NCE_NRIV_MAP_STRUC>-NCE_NRNR = 1.
<CNV_NCE_NRIV_MAP_STRUC>-NRRANGENR = 1.
<CNV_NCE_NRIV_MAP_STRUC>-EXTERNAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNV_NCE_NRIV_MAP_STRUC-TOYEAR, sy-vline,
  WA_CNV_NCE_NRIV_MAP_STRUC-YEARIND, sy-vline,
  WA_CNV_NCE_NRIV_MAP_STRUC-FROMNUMBER, sy-vline,
  WA_CNV_NCE_NRIV_MAP_STRUC-TONUMBER, sy-vline,
  WA_CNV_NCE_NRIV_MAP_STRUC-NRLEVEL, sy-vline,
  WA_CNV_NCE_NRIV_MAP_STRUC-TEMPNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNV_NCE_NRIV_MAP_STRUC 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_CNV_NCE_NRIV_MAP_STRUC 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_CNV_NCE_NRIV_MAP_STRUC INTO WA_CNV_NCE_NRIV_MAP_STRUC.


*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 GJAHR, internal->external for field TOYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CNV_NCE_NRIV_MAP_STRUC-TOYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_NCE_NRIV_MAP_STRUC-TOYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field T_TOYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_CNV_NCE_NRIV_MAP_STRUC-T_TOYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_CNV_NCE_NRIV_MAP_STRUC-T_TOYEAR.
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_CNV_NCE_NRIV_MAP_STRUC_STR, 
OBJECT TYPE STRING,
SUBOBJECT TYPE STRING,
NCE_NRNR TYPE STRING,
NRRANGENR TYPE STRING,
EXTERNAL TYPE STRING,
TOYEAR TYPE STRING,
YEARIND TYPE STRING,
FROMNUMBER TYPE STRING,
TONUMBER TYPE STRING,
NRLEVEL TYPE STRING,
TEMPNR TYPE STRING,
NCE_SYSID TYPE STRING,
NCE_CLIENT TYPE STRING,
T_SOBJ TYPE STRING,
T_NRID TYPE STRING,
T_EXT TYPE STRING,
T_TOYEAR TYPE STRING,
T_FROMNUMBER TYPE STRING,
T_TONUMBER TYPE STRING,
T_NCE_SYSID TYPE STRING,
T_NCE_CLIENT TYPE STRING,
CONVRULE TYPE STRING,
RULENAME TYPE STRING,
WRK_STAT TYPE STRING,
WRK_ICON TYPE STRING,
STATUS_TEXT TYPE STRING,
NCE_ORDER TYPE STRING,
NCE_OFFSET TYPE STRING,
NCE_ROUND TYPE STRING,
NCE_PATTERN TYPE STRING,
EXT_FUNCTION TYPE STRING,
MSGNUMBER TYPE STRING,
SIM_STAT TYPE STRING,
SIM_TEXT TYPE STRING,
SIM_ICON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNV_NCE_NRIV_MAP_STRUC_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_CNV_NCE_NRIV_MAP_STRUC_STR-OBJECT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-SUBOBJECT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NCE_NRNR sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NRRANGENR sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-EXTERNAL sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-TOYEAR sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-YEARIND sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-FROMNUMBER sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-TONUMBER sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NRLEVEL sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-TEMPNR sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NCE_SYSID sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NCE_CLIENT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-T_SOBJ sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-T_NRID sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-T_EXT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-T_TOYEAR sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-T_FROMNUMBER sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-T_TONUMBER sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-T_NCE_SYSID sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-T_NCE_CLIENT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-CONVRULE sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-RULENAME sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-WRK_STAT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-WRK_ICON sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-STATUS_TEXT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NCE_ORDER sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NCE_OFFSET sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NCE_ROUND sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-NCE_PATTERN sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-EXT_FUNCTION sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-MSGNUMBER sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-SIM_STAT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-SIM_TEXT sy-vline 
WA_CNV_NCE_NRIV_MAP_STRUC_STR-SIM_ICON sy-vline      INTO ld_text SEPARATED BY SPACE.

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