ABAP Select data from SAP table PKHD_ALV_ASW into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PKHD_ALV_ASW
*  INTO TABLE @DATA(IT_PKHD_ALV_ASW2).
*--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_PKHD_ALV_ASW INDEX 1 INTO DATA(WA_PKHD_ALV_ASW2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PKHD_ALV_ASW>-PKEXP = 1.
<PKHD_ALV_ASW>-PKNUM = 1.
<PKHD_ALV_ASW>-MATNR = 1.
<PKHD_ALV_ASW>-MAKTX = 1.
<PKHD_ALV_ASW>-WERKS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PKHD_ALV_ASW-PRVBE, sy-vline,
  WA_PKHD_ALV_ASW-PVBTX, sy-vline,
  WA_PKHD_ALV_ASW-BEHAZ, sy-vline,
  WA_PKHD_ALV_ASW-BEHMG, sy-vline,
  WA_PKHD_ALV_ASW-MEINS, sy-vline,
  WA_PKHD_ALV_ASW-VERID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PKHD_ALV_ASW 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_PKHD_ALV_ASW 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_PKHD_ALV_ASW INTO WA_PKHD_ALV_ASW.


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

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_ALV_ASW-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_ALV_ASW-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_ALV_ASW-MEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_ALV_ASW-MEINS.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit MATN1, internal->external for field PKBHT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_ALV_ASW-PKBHT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_ALV_ASW-PKBHT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit SPDEV, internal->external for field VBPRN
CALL FUNCTION 'CONVERSION_EXIT_SPDEV_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_ALV_ASW-VBPRN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_ALV_ASW-VBPRN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field KWBZM
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_ALV_ASW-KWBZM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_ALV_ASW-KWBZM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PKHD_ALV_ASW-VBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PKHD_ALV_ASW-VBELN.
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_PKHD_ALV_ASW_STR, 
PKEXP TYPE STRING,
PKNUM TYPE STRING,
MATNR TYPE STRING,
MAKTX TYPE STRING,
WERKS TYPE STRING,
PRVBE TYPE STRING,
PVBTX TYPE STRING,
BEHAZ TYPE STRING,
BEHMG TYPE STRING,
MEINS TYPE STRING,
VERID TYPE STRING,
SIGAZ TYPE STRING,
RGVER TYPE STRING,
PKSTE TYPE STRING,
LGNUM TYPE STRING,
LGTYP TYPE STRING,
LGPLA TYPE STRING,
PKSTF TYPE STRING,
PKSTU TYPE STRING,
PKSBZ TYPE STRING,
LIFNR TYPE STRING,
EKORG TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
ANSWB TYPE STRING,
PKBHT TYPE STRING,
QUFKT TYPE STRING,
UMLGO TYPE STRING,
RKSTA TYPE STRING,
KOSTL TYPE STRING,
VBPRN TYPE STRING,
PKDRS TYPE STRING,
PKUMW TYPE STRING,
PKSFG TYPE STRING,
PKLOG TYPE STRING,
ALSMG TYPE STRING,
ABLAD TYPE STRING,
KCART TYPE STRING,
KCSAF TYPE STRING,
KCCON TYPE STRING,
PKRMG TYPE STRING,
PKFMG TYPE STRING,
KCPRF TYPE STRING,
KWBZD TYPE STRING,
KWBZM TYPE STRING,
VBELN TYPE STRING,
VBELP TYPE STRING,
QUPVB TYPE STRING,
PABPRF TYPE STRING,
LGORT TYPE STRING,
RGVER_PVB TYPE STRING,
ABLAD_PVB TYPE STRING,
NLPLA TYPE STRING,
VLPLA TYPE STRING,
PRCTY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PKHD_ALV_ASW_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_PKHD_ALV_ASW_STR-PKEXP sy-vline 
WA_PKHD_ALV_ASW_STR-PKNUM sy-vline 
WA_PKHD_ALV_ASW_STR-MATNR sy-vline 
WA_PKHD_ALV_ASW_STR-MAKTX sy-vline 
WA_PKHD_ALV_ASW_STR-WERKS sy-vline 
WA_PKHD_ALV_ASW_STR-PRVBE sy-vline 
WA_PKHD_ALV_ASW_STR-PVBTX sy-vline 
WA_PKHD_ALV_ASW_STR-BEHAZ sy-vline 
WA_PKHD_ALV_ASW_STR-BEHMG sy-vline 
WA_PKHD_ALV_ASW_STR-MEINS sy-vline 
WA_PKHD_ALV_ASW_STR-VERID sy-vline 
WA_PKHD_ALV_ASW_STR-SIGAZ sy-vline 
WA_PKHD_ALV_ASW_STR-RGVER sy-vline 
WA_PKHD_ALV_ASW_STR-PKSTE sy-vline 
WA_PKHD_ALV_ASW_STR-LGNUM sy-vline 
WA_PKHD_ALV_ASW_STR-LGTYP sy-vline 
WA_PKHD_ALV_ASW_STR-LGPLA sy-vline 
WA_PKHD_ALV_ASW_STR-PKSTF sy-vline 
WA_PKHD_ALV_ASW_STR-PKSTU sy-vline 
WA_PKHD_ALV_ASW_STR-PKSBZ sy-vline 
WA_PKHD_ALV_ASW_STR-LIFNR sy-vline 
WA_PKHD_ALV_ASW_STR-EKORG sy-vline 
WA_PKHD_ALV_ASW_STR-EBELN sy-vline 
WA_PKHD_ALV_ASW_STR-EBELP sy-vline 
WA_PKHD_ALV_ASW_STR-ANSWB sy-vline 
WA_PKHD_ALV_ASW_STR-PKBHT sy-vline 
WA_PKHD_ALV_ASW_STR-QUFKT sy-vline 
WA_PKHD_ALV_ASW_STR-UMLGO sy-vline 
WA_PKHD_ALV_ASW_STR-RKSTA sy-vline 
WA_PKHD_ALV_ASW_STR-KOSTL sy-vline 
WA_PKHD_ALV_ASW_STR-VBPRN sy-vline 
WA_PKHD_ALV_ASW_STR-PKDRS sy-vline 
WA_PKHD_ALV_ASW_STR-PKUMW sy-vline 
WA_PKHD_ALV_ASW_STR-PKSFG sy-vline 
WA_PKHD_ALV_ASW_STR-PKLOG sy-vline 
WA_PKHD_ALV_ASW_STR-ALSMG sy-vline 
WA_PKHD_ALV_ASW_STR-ABLAD sy-vline 
WA_PKHD_ALV_ASW_STR-KCART sy-vline 
WA_PKHD_ALV_ASW_STR-KCSAF sy-vline 
WA_PKHD_ALV_ASW_STR-KCCON sy-vline 
WA_PKHD_ALV_ASW_STR-PKRMG sy-vline 
WA_PKHD_ALV_ASW_STR-PKFMG sy-vline 
WA_PKHD_ALV_ASW_STR-KCPRF sy-vline 
WA_PKHD_ALV_ASW_STR-KWBZD sy-vline 
WA_PKHD_ALV_ASW_STR-KWBZM sy-vline 
WA_PKHD_ALV_ASW_STR-VBELN sy-vline 
WA_PKHD_ALV_ASW_STR-VBELP sy-vline 
WA_PKHD_ALV_ASW_STR-QUPVB sy-vline 
WA_PKHD_ALV_ASW_STR-PABPRF sy-vline 
WA_PKHD_ALV_ASW_STR-LGORT sy-vline 
WA_PKHD_ALV_ASW_STR-RGVER_PVB sy-vline 
WA_PKHD_ALV_ASW_STR-ABLAD_PVB sy-vline 
WA_PKHD_ALV_ASW_STR-NLPLA sy-vline 
WA_PKHD_ALV_ASW_STR-VLPLA sy-vline 
WA_PKHD_ALV_ASW_STR-PRCTY sy-vline      INTO ld_text SEPARATED BY SPACE.

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