ABAP Select data from SAP table V_CKMLVARIANT into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_CKMLVARIANT
*  INTO TABLE @DATA(IT_V_CKMLVARIANT2).
*--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_V_CKMLVARIANT INDEX 1 INTO DATA(WA_V_CKMLVARIANT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_CKMLVARIANT>-MANDT = 1.
<V_CKMLVARIANT>-FIFOVAR = 1.
<V_CKMLVARIANT>-RSCHEMA = 1.
<V_CKMLVARIANT>-XKDM = 1.
<V_CKMLVARIANT>-XMULTI = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_CKMLVARIANT-XEBEW, sy-vline,
  WA_V_CKMLVARIANT-XQBEW, sy-vline,
  WA_V_CKMLVARIANT-EXPOL, sy-vline,
  WA_V_CKMLVARIANT-ALTNT, sy-vline,
  WA_V_CKMLVARIANT-SOCLE, sy-vline,
  WA_V_CKMLVARIANT-LASTR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_CKMLVARIANT 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_V_CKMLVARIANT 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_V_CKMLVARIANT INTO WA_V_CKMLVARIANT.


*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_V_CKMLVARIANT_STR, 
MANDT TYPE STRING,
FIFOVAR TYPE STRING,
RSCHEMA TYPE STRING,
XKDM TYPE STRING,
XMULTI TYPE STRING,
XEBEW TYPE STRING,
XQBEW TYPE STRING,
EXPOL TYPE STRING,
ALTNT TYPE STRING,
SOCLE TYPE STRING,
LASTR TYPE STRING,
MATPR TYPE STRING,
XALLCR TYPE STRING,
CURT1 TYPE STRING,
CURT2 TYPE STRING,
CURT3 TYPE STRING,
PRKZG TYPE STRING,
KTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_CKMLVARIANT_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_V_CKMLVARIANT_STR-MANDT sy-vline 
WA_V_CKMLVARIANT_STR-FIFOVAR sy-vline 
WA_V_CKMLVARIANT_STR-RSCHEMA sy-vline 
WA_V_CKMLVARIANT_STR-XKDM sy-vline 
WA_V_CKMLVARIANT_STR-XMULTI sy-vline 
WA_V_CKMLVARIANT_STR-XEBEW sy-vline 
WA_V_CKMLVARIANT_STR-XQBEW sy-vline 
WA_V_CKMLVARIANT_STR-EXPOL sy-vline 
WA_V_CKMLVARIANT_STR-ALTNT sy-vline 
WA_V_CKMLVARIANT_STR-SOCLE sy-vline 
WA_V_CKMLVARIANT_STR-LASTR sy-vline 
WA_V_CKMLVARIANT_STR-MATPR sy-vline 
WA_V_CKMLVARIANT_STR-XALLCR sy-vline 
WA_V_CKMLVARIANT_STR-CURT1 sy-vline 
WA_V_CKMLVARIANT_STR-CURT2 sy-vline 
WA_V_CKMLVARIANT_STR-CURT3 sy-vline 
WA_V_CKMLVARIANT_STR-PRKZG sy-vline 
WA_V_CKMLVARIANT_STR-KTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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