ABAP Select data from SAP table /NAKISA/VW_KEYQU into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /NAKISA/VW_KEYQU
*  INTO TABLE @DATA(IT_/NAKISA/VW_KEYQU2).
*--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_/NAKISA/VW_KEYQU INDEX 1 INTO DATA(WA_/NAKISA/VW_KEYQU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</NAKISA/VW_KEYQU>-MANDT = 1.
</NAKISA/VW_KEYQU>-QUALIFICATIONID = 1.
</NAKISA/VW_KEYQU>-PLVAR = 1.
</NAKISA/VW_KEYQU>-HRP1000BEGDA = 1.
</NAKISA/VW_KEYQU>-HRP1000ENDDA = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/NAKISA/VW_KEYQU-QUALIFICATION, sy-vline,
  WA_/NAKISA/VW_KEYQU-HRP1001BEGDA, sy-vline,
  WA_/NAKISA/VW_KEYQU-HRP1001ENDDA, sy-vline,
  WA_/NAKISA/VW_KEYQU-HRP1000LANGU, sy-vline,
  WA_/NAKISA/VW_KEYQU-HRP1033BEGDA, sy-vline,
  WA_/NAKISA/VW_KEYQU-HRP1033ENDDA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/NAKISA/VW_KEYQU 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_/NAKISA/VW_KEYQU 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_/NAKISA/VW_KEYQU INTO WA_/NAKISA/VW_KEYQU.


*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 ISOLA, internal->external for field HRP1000LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_/NAKISA/VW_KEYQU-HRP1000LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/NAKISA/VW_KEYQU-HRP1000LANGU.
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_/NAKISA/VW_KEYQU_STR, 
MANDT TYPE STRING,
QUALIFICATIONID TYPE STRING,
PLVAR TYPE STRING,
HRP1000BEGDA TYPE STRING,
HRP1000ENDDA TYPE STRING,
QUALIFICATION TYPE STRING,
HRP1001BEGDA TYPE STRING,
HRP1001ENDDA TYPE STRING,
HRP1000LANGU TYPE STRING,
HRP1033BEGDA TYPE STRING,
HRP1033ENDDA TYPE STRING,
CATEGORY TYPE STRING,
ISTAT TYPE STRING,
SCALE_ID TYPE STRING,
RATING TYPE STRING,
PROFICIENCY TYPE STRING,
CATEGORY_DESCR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/NAKISA/VW_KEYQU_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_/NAKISA/VW_KEYQU_STR-MANDT sy-vline 
WA_/NAKISA/VW_KEYQU_STR-QUALIFICATIONID sy-vline 
WA_/NAKISA/VW_KEYQU_STR-PLVAR sy-vline 
WA_/NAKISA/VW_KEYQU_STR-HRP1000BEGDA sy-vline 
WA_/NAKISA/VW_KEYQU_STR-HRP1000ENDDA sy-vline 
WA_/NAKISA/VW_KEYQU_STR-QUALIFICATION sy-vline 
WA_/NAKISA/VW_KEYQU_STR-HRP1001BEGDA sy-vline 
WA_/NAKISA/VW_KEYQU_STR-HRP1001ENDDA sy-vline 
WA_/NAKISA/VW_KEYQU_STR-HRP1000LANGU sy-vline 
WA_/NAKISA/VW_KEYQU_STR-HRP1033BEGDA sy-vline 
WA_/NAKISA/VW_KEYQU_STR-HRP1033ENDDA sy-vline 
WA_/NAKISA/VW_KEYQU_STR-CATEGORY sy-vline 
WA_/NAKISA/VW_KEYQU_STR-ISTAT sy-vline 
WA_/NAKISA/VW_KEYQU_STR-SCALE_ID sy-vline 
WA_/NAKISA/VW_KEYQU_STR-RATING sy-vline 
WA_/NAKISA/VW_KEYQU_STR-PROFICIENCY sy-vline 
WA_/NAKISA/VW_KEYQU_STR-CATEGORY_DESCR sy-vline      INTO ld_text SEPARATED BY SPACE.

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