ABAP Select data from SAP table /SCMB/S_RES_CNA_DOWN_EXT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCMB/S_RES_CNA_DOWN_EXT 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 /SCMB/S_RES_CNA_DOWN_EXT. 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 /SCMB/S_RES_CNA_DOWN_EXT 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_/SCMB/S_RES_CNA_DOWN_EXT TYPE STANDARD TABLE OF /SCMB/S_RES_CNA_DOWN_EXT,
      WA_/SCMB/S_RES_CNA_DOWN_EXT TYPE /SCMB/S_RES_CNA_DOWN_EXT,
      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: </SCMB/S_RES_CNA_DOWN_EXT> TYPE /SCMB/S_RES_CNA_DOWN_EXT.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCMB/S_RES_CNA_DOWN_EXT
  INTO TABLE IT_/SCMB/S_RES_CNA_DOWN_EXT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCMB/S_RES_CNA_DOWN_EXT
*  INTO TABLE @DATA(IT_/SCMB/S_RES_CNA_DOWN_EXT2).
*--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_/SCMB/S_RES_CNA_DOWN_EXT INDEX 1 INTO DATA(WA_/SCMB/S_RES_CNA_DOWN_EXT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCMB/S_RES_CNA_DOWN_EXT ASSIGNING </SCMB/S_RES_CNA_DOWN_EXT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCMB/S_RES_CNA_DOWN_EXT>-INDX = 1.
</SCMB/S_RES_CNA_DOWN_EXT>-CHGTST = 1.
</SCMB/S_RES_CNA_DOWN_EXT>-OBJCHG = 1.
</SCMB/S_RES_CNA_DOWN_EXT>-IMG = 1.
</SCMB/S_RES_CNA_DOWN_EXT>-MANDT = 1.

ENDLOOP.

LOOP AT IT_/SCMB/S_RES_CNA_DOWN_EXT INTO WA_/SCMB/S_RES_CNA_DOWN_EXT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCMB/S_RES_CNA_DOWN_EXT-RESUID, sy-vline,
  WA_/SCMB/S_RES_CNA_DOWN_EXT-SIMVERSID, sy-vline,
  WA_/SCMB/S_RES_CNA_DOWN_EXT-SIMSESSID, sy-vline,
  WA_/SCMB/S_RES_CNA_DOWN_EXT-DOWNID, sy-vline,
  WA_/SCMB/S_RES_CNA_DOWN_EXT-BEGDA, sy-vline,
  WA_/SCMB/S_RES_CNA_DOWN_EXT-BEGTI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCMB/S_RES_CNA_DOWN_EXT 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_/SCMB/S_RES_CNA_DOWN_EXT 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_/SCMB/S_RES_CNA_DOWN_EXT INTO WA_/SCMB/S_RES_CNA_DOWN_EXT.


*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 CUNIT, internal->external for field NOINDIVRES_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCMB/S_RES_CNA_DOWN_EXT-NOINDIVRES_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMB/S_RES_CNA_DOWN_EXT-NOINDIVRES_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/SCMB/S_RES_CNA_DOWN_EXT-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMB/S_RES_CNA_DOWN_EXT-LANGU.
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_/SCMB/S_RES_CNA_DOWN_EXT_STR, 
INDX TYPE STRING,
CHGTST TYPE STRING,
OBJCHG TYPE STRING,
IMG TYPE STRING,
MANDT TYPE STRING,
RESUID TYPE STRING,
SIMVERSID TYPE STRING,
SIMSESSID TYPE STRING,
DOWNID TYPE STRING,
BEGDA TYPE STRING,
BEGTI TYPE STRING,
ENDDA TYPE STRING,
ENDTI TYPE STRING,
NOINDIVRES TYPE STRING,
NOINDIVRES_UNIT TYPE STRING,
TYPE TYPE STRING,
ORDID TYPE STRING,
LOCID TYPE STRING,
TZONE TYPE STRING,
BASE_DOCUMENT_ID TYPE STRING,
BASE_DOCUMENT_CAT TYPE STRING,
LANGU TYPE STRING,
TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCMB/S_RES_CNA_DOWN_EXT_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_/SCMB/S_RES_CNA_DOWN_EXT_STR-INDX sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-CHGTST sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-OBJCHG sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-IMG sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-MANDT sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-RESUID sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-SIMVERSID sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-SIMSESSID sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-DOWNID sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-BEGDA sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-BEGTI sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-ENDDA sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-ENDTI sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-NOINDIVRES sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-NOINDIVRES_UNIT sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-TYPE sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-ORDID sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-LOCID sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-TZONE sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-BASE_DOCUMENT_ID sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-BASE_DOCUMENT_CAT sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-LANGU sy-vline 
WA_/SCMB/S_RES_CNA_DOWN_EXT_STR-TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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