ABAP Select data from SAP table CNVC_SCNR_SCMD1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP CNVC_SCNR_SCMD1 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 CNVC_SCNR_SCMD1. 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 CNVC_SCNR_SCMD1 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_CNVC_SCNR_SCMD1 TYPE STANDARD TABLE OF CNVC_SCNR_SCMD1,
      WA_CNVC_SCNR_SCMD1 TYPE CNVC_SCNR_SCMD1,
      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: <CNVC_SCNR_SCMD1> TYPE CNVC_SCNR_SCMD1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_CNVC_SCNR_SCMD1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM CNVC_SCNR_SCMD1
  INTO TABLE IT_CNVC_SCNR_SCMD1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM CNVC_SCNR_SCMD1
*  INTO TABLE @DATA(IT_CNVC_SCNR_SCMD12).
*--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_CNVC_SCNR_SCMD1 INDEX 1 INTO DATA(WA_CNVC_SCNR_SCMD12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_CNVC_SCNR_SCMD1 ASSIGNING <CNVC_SCNR_SCMD1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<CNVC_SCNR_SCMD1>-CLIENT = 1.
<CNVC_SCNR_SCMD1>-OBJECT = 1.
<CNVC_SCNR_SCMD1>-TABCOUNT = 1.
<CNVC_SCNR_SCMD1>-TABNAME = 1.
<CNVC_SCNR_SCMD1>-REFTAB = 1.

ENDLOOP.

LOOP AT IT_CNVC_SCNR_SCMD1 INTO WA_CNVC_SCNR_SCMD1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_CNVC_SCNR_SCMD1-SUBOBJECT, sy-vline,
  WA_CNVC_SCNR_SCMD1-YEARIND, sy-vline,
  WA_CNVC_SCNR_SCMD1-EXIT_FLAG, sy-vline,
  WA_CNVC_SCNR_SCMD1-DOMNAME, sy-vline,
  WA_CNVC_SCNR_SCMD1-INCLROLL, sy-vline,
  WA_CNVC_SCNR_SCMD1-ROLLNAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_CNVC_SCNR_SCMD1 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_CNVC_SCNR_SCMD1 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_CNVC_SCNR_SCMD1 INTO WA_CNVC_SCNR_SCMD1.


*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_CNVC_SCNR_SCMD1_STR, 
CLIENT TYPE STRING,
OBJECT TYPE STRING,
TABCOUNT TYPE STRING,
TABNAME TYPE STRING,
REFTAB TYPE STRING,
SUBOBJECT TYPE STRING,
YEARIND TYPE STRING,
EXIT_FLAG TYPE STRING,
DOMNAME TYPE STRING,
INCLROLL TYPE STRING,
ROLLNAME TYPE STRING,
INCLFIELD TYPE STRING,
FIELDNAME TYPE STRING,
TXT TYPE STRING,
EXCEPTAB TYPE STRING,
ACTIVKZ TYPE STRING,
TYP TYPE STRING,
KOMMENTAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_CNVC_SCNR_SCMD1_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_CNVC_SCNR_SCMD1_STR-CLIENT sy-vline 
WA_CNVC_SCNR_SCMD1_STR-OBJECT sy-vline 
WA_CNVC_SCNR_SCMD1_STR-TABCOUNT sy-vline 
WA_CNVC_SCNR_SCMD1_STR-TABNAME sy-vline 
WA_CNVC_SCNR_SCMD1_STR-REFTAB sy-vline 
WA_CNVC_SCNR_SCMD1_STR-SUBOBJECT sy-vline 
WA_CNVC_SCNR_SCMD1_STR-YEARIND sy-vline 
WA_CNVC_SCNR_SCMD1_STR-EXIT_FLAG sy-vline 
WA_CNVC_SCNR_SCMD1_STR-DOMNAME sy-vline 
WA_CNVC_SCNR_SCMD1_STR-INCLROLL sy-vline 
WA_CNVC_SCNR_SCMD1_STR-ROLLNAME sy-vline 
WA_CNVC_SCNR_SCMD1_STR-INCLFIELD sy-vline 
WA_CNVC_SCNR_SCMD1_STR-FIELDNAME sy-vline 
WA_CNVC_SCNR_SCMD1_STR-TXT sy-vline 
WA_CNVC_SCNR_SCMD1_STR-EXCEPTAB sy-vline 
WA_CNVC_SCNR_SCMD1_STR-ACTIVKZ sy-vline 
WA_CNVC_SCNR_SCMD1_STR-TYP sy-vline 
WA_CNVC_SCNR_SCMD1_STR-KOMMENTAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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