ABAP Select data from SAP table PLWPB into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PLWPB
*  INTO TABLE @DATA(IT_PLWPB2).
*--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_PLWPB INDEX 1 INTO DATA(WA_PLWPB2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PLWPB>-FLG_SEL = 1.
<PLWPB>-MANDT = 1.
<PLWPB>-PLNTY = 1.
<PLWPB>-PLNNR = 1.
<PLWPB>-PLNAL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PLWPB-PLNFL, sy-vline,
  WA_PLWPB-PLNKN, sy-vline,
  WA_PLWPB-PAKET, sy-vline,
  WA_PLWPB-ZAEHL, sy-vline,
  WA_PLWPB-DATUV, sy-vline,
  WA_PLWPB-TECHV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PLWPB 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_PLWPB 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_PLWPB INTO WA_PLWPB.


*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 PLNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PLWPB-PLNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PLWPB-PLNNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field AENNR_AUS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PLWPB-AENNR_AUS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PLWPB-AENNR_AUS.
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_PLWPB_STR, 
FLG_SEL TYPE STRING,
MANDT TYPE STRING,
PLNTY TYPE STRING,
PLNNR TYPE STRING,
PLNAL TYPE STRING,
PLNFL TYPE STRING,
PLNKN TYPE STRING,
PAKET TYPE STRING,
ZAEHL TYPE STRING,
DATUV TYPE STRING,
TECHV TYPE STRING,
STRAT TYPE STRING,
IWPOK TYPE STRING,
FLGWP TYPE STRING,
LOEKZ TYPE STRING,
PARKZ TYPE STRING,
AENNR TYPE STRING,
ANDAT TYPE STRING,
ANNAM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
VBKZ TYPE STRING,
DATUB TYPE STRING,
AENNR_AUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PLWPB_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_PLWPB_STR-FLG_SEL sy-vline 
WA_PLWPB_STR-MANDT sy-vline 
WA_PLWPB_STR-PLNTY sy-vline 
WA_PLWPB_STR-PLNNR sy-vline 
WA_PLWPB_STR-PLNAL sy-vline 
WA_PLWPB_STR-PLNFL sy-vline 
WA_PLWPB_STR-PLNKN sy-vline 
WA_PLWPB_STR-PAKET sy-vline 
WA_PLWPB_STR-ZAEHL sy-vline 
WA_PLWPB_STR-DATUV sy-vline 
WA_PLWPB_STR-TECHV sy-vline 
WA_PLWPB_STR-STRAT sy-vline 
WA_PLWPB_STR-IWPOK sy-vline 
WA_PLWPB_STR-FLGWP sy-vline 
WA_PLWPB_STR-LOEKZ sy-vline 
WA_PLWPB_STR-PARKZ sy-vline 
WA_PLWPB_STR-AENNR sy-vline 
WA_PLWPB_STR-ANDAT sy-vline 
WA_PLWPB_STR-ANNAM sy-vline 
WA_PLWPB_STR-AEDAT sy-vline 
WA_PLWPB_STR-AENAM sy-vline 
WA_PLWPB_STR-VBKZ sy-vline 
WA_PLWPB_STR-DATUB sy-vline 
WA_PLWPB_STR-AENNR_AUS sy-vline      INTO ld_text SEPARATED BY SPACE.

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