ABAP Select data from SAP table KALV_LIST_DATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM KALV_LIST_DATA
*  INTO TABLE @DATA(IT_KALV_LIST_DATA2).
*--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_KALV_LIST_DATA INDEX 1 INTO DATA(WA_KALV_LIST_DATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<KALV_LIST_DATA>-GJAHR = 1.
<KALV_LIST_DATA>-PERIO = 1.
<KALV_LIST_DATA>-PAROB1 = 1.
<KALV_LIST_DATA>-PAROB1_ID = 1.
<KALV_LIST_DATA>-PAROB1_ID2 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_KALV_LIST_DATA-PGEBER, sy-vline,
  WA_KALV_LIST_DATA-PBUDGET_PD, sy-vline,
  WA_KALV_LIST_DATA-PFKBER, sy-vline,
  WA_KALV_LIST_DATA-PGRANT_NBR, sy-vline,
  WA_KALV_LIST_DATA-OBJNR, sy-vline,
  WA_KALV_LIST_DATA-OBJNR_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_KALV_LIST_DATA 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_KALV_LIST_DATA 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_KALV_LIST_DATA INTO WA_KALV_LIST_DATA.


*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 GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PGRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-PGRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-PGRANT_NBR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field GRANT_NBR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-GRANT_NBR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-GRANT_NBR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KSTAR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-KSTAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-KSTAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-WKGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-WKGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WKFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-WKFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-WKFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PAGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-PAGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-PAGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field PAFBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-PAFBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-PAFBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field WOGBTR
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-WOGBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-WOGBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VERSN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_KALV_LIST_DATA-VERSN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_KALV_LIST_DATA-VERSN.
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_KALV_LIST_DATA_STR, 
GJAHR TYPE STRING,
PERIO TYPE STRING,
PAROB1 TYPE STRING,
PAROB1_ID TYPE STRING,
PAROB1_ID2 TYPE STRING,
PGEBER TYPE STRING,
PBUDGET_PD TYPE STRING,
PFKBER TYPE STRING,
PGRANT_NBR TYPE STRING,
OBJNR TYPE STRING,
OBJNR_ID TYPE STRING,
OBJNR_ID2 TYPE STRING,
GEBER TYPE STRING,
BUDGET_PD TYPE STRING,
FKBER TYPE STRING,
GRANT_NBR TYPE STRING,
KSTAR TYPE STRING,
WKGBTR TYPE STRING,
WKFBTR TYPE STRING,
PAGBTR TYPE STRING,
PAFBTR TYPE STRING,
WOGBTR TYPE STRING,
OWAER TYPE STRING,
WAERS TYPE STRING,
BELNR TYPE STRING,
BUZEI TYPE STRING,
VERSN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_KALV_LIST_DATA_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_KALV_LIST_DATA_STR-GJAHR sy-vline 
WA_KALV_LIST_DATA_STR-PERIO sy-vline 
WA_KALV_LIST_DATA_STR-PAROB1 sy-vline 
WA_KALV_LIST_DATA_STR-PAROB1_ID sy-vline 
WA_KALV_LIST_DATA_STR-PAROB1_ID2 sy-vline 
WA_KALV_LIST_DATA_STR-PGEBER sy-vline 
WA_KALV_LIST_DATA_STR-PBUDGET_PD sy-vline 
WA_KALV_LIST_DATA_STR-PFKBER sy-vline 
WA_KALV_LIST_DATA_STR-PGRANT_NBR sy-vline 
WA_KALV_LIST_DATA_STR-OBJNR sy-vline 
WA_KALV_LIST_DATA_STR-OBJNR_ID sy-vline 
WA_KALV_LIST_DATA_STR-OBJNR_ID2 sy-vline 
WA_KALV_LIST_DATA_STR-GEBER sy-vline 
WA_KALV_LIST_DATA_STR-BUDGET_PD sy-vline 
WA_KALV_LIST_DATA_STR-FKBER sy-vline 
WA_KALV_LIST_DATA_STR-GRANT_NBR sy-vline 
WA_KALV_LIST_DATA_STR-KSTAR sy-vline 
WA_KALV_LIST_DATA_STR-WKGBTR sy-vline 
WA_KALV_LIST_DATA_STR-WKFBTR sy-vline 
WA_KALV_LIST_DATA_STR-PAGBTR sy-vline 
WA_KALV_LIST_DATA_STR-PAFBTR sy-vline 
WA_KALV_LIST_DATA_STR-WOGBTR sy-vline 
WA_KALV_LIST_DATA_STR-OWAER sy-vline 
WA_KALV_LIST_DATA_STR-WAERS sy-vline 
WA_KALV_LIST_DATA_STR-BELNR sy-vline 
WA_KALV_LIST_DATA_STR-BUZEI sy-vline 
WA_KALV_LIST_DATA_STR-VERSN sy-vline      INTO ld_text SEPARATED BY SPACE.

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