ABAP Select data from SAP table PKW_HKWPGSI0_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PKW_HKWPGSI0_ALV 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 PKW_HKWPGSI0_ALV. 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 PKW_HKWPGSI0_ALV 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_PKW_HKWPGSI0_ALV TYPE STANDARD TABLE OF PKW_HKWPGSI0_ALV,
      WA_PKW_HKWPGSI0_ALV TYPE PKW_HKWPGSI0_ALV,
      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: <PKW_HKWPGSI0_ALV> TYPE PKW_HKWPGSI0_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PKW_HKWPGSI0_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PKW_HKWPGSI0_ALV
  INTO TABLE IT_PKW_HKWPGSI0_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKW_HKWPGSI0_ALV
*  INTO TABLE @DATA(IT_PKW_HKWPGSI0_ALV2).
*--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_PKW_HKWPGSI0_ALV INDEX 1 INTO DATA(WA_PKW_HKWPGSI0_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PKW_HKWPGSI0_ALV ASSIGNING <PKW_HKWPGSI0_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKW_HKWPGSI0_ALV>-PERNR = 1.
<PKW_HKWPGSI0_ALV>-FNAME = 1.
<PKW_HKWPGSI0_ALV>-PISSS = 1.
<PKW_HKWPGSI0_ALV>-EESSC = 1.
<PKW_HKWPGSI0_ALV>-ERSSC = 1.

ENDLOOP.

LOOP AT IT_PKW_HKWPGSI0_ALV INTO WA_PKW_HKWPGSI0_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKW_HKWPGSI0_ALV-REESS, sy-vline,
  WA_PKW_HKWPGSI0_ALV-RERSS, sy-vline,
  WA_PKW_HKWPGSI0_ALV-EEBCO, sy-vline,
  WA_PKW_HKWPGSI0_ALV-ERBCO, sy-vline,
  WA_PKW_HKWPGSI0_ALV-REEBC, sy-vline,
  WA_PKW_HKWPGSI0_ALV-RERBC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKW_HKWPGSI0_ALV 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_PKW_HKWPGSI0_ALV 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_PKW_HKWPGSI0_ALV INTO WA_PKW_HKWPGSI0_ALV.


*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_PKW_HKWPGSI0_ALV_STR, 
PERNR TYPE STRING,
FNAME TYPE STRING,
PISSS TYPE STRING,
EESSC TYPE STRING,
ERSSC TYPE STRING,
REESS TYPE STRING,
RERSS TYPE STRING,
EEBCO TYPE STRING,
ERBCO TYPE STRING,
REEBC TYPE STRING,
RERBC TYPE STRING,
EECCO TYPE STRING,
ERCCO TYPE STRING,
REECC TYPE STRING,
RERCC TYPE STRING,
EERCO TYPE STRING,
ERRCO TYPE STRING,
REERC TYPE STRING,
RERRC TYPE STRING,
EEUCO TYPE STRING,
ERUCO TYPE STRING,
REEUC TYPE STRING,
RERUC TYPE STRING,
EETCO TYPE STRING,
ERTCO TYPE STRING,
SSTCO TYPE STRING,
WAERS TYPE STRING,
EESRF TYPE STRING,
RESRF TYPE STRING,
PRIAM TYPE STRING,
RPRIA TYPE STRING,
PSICN TYPE STRING,
BUKRS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKW_HKWPGSI0_ALV_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_PKW_HKWPGSI0_ALV_STR-PERNR sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-FNAME sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-PISSS sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-EESSC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-ERSSC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-REESS sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-RERSS sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-EEBCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-ERBCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-REEBC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-RERBC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-EECCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-ERCCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-REECC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-RERCC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-EERCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-ERRCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-REERC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-RERRC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-EEUCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-ERUCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-REEUC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-RERUC sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-EETCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-ERTCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-SSTCO sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-WAERS sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-EESRF sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-RESRF sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-PRIAM sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-RPRIA sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-PSICN sy-vline 
WA_PKW_HKWPGSI0_ALV_STR-BUKRS sy-vline      INTO ld_text SEPARATED BY SPACE.

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