ABAP Select data from SAP table PSBWCMPTXT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSBWCMPTXT
*  INTO TABLE @DATA(IT_PSBWCMPTXT2).
*--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_PSBWCMPTXT INDEX 1 INTO DATA(WA_PSBWCMPTXT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSBWCMPTXT>-DATEFROM = 1.
<PSBWCMPTXT>-DATETO = 1.
<PSBWCMPTXT>-PSPID = 1.
<PSBWCMPTXT>-POSID = 1.
<PSBWCMPTXT>-AUFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSBWCMPTXT-COMPT, sy-vline,
  WA_PSBWCMPTXT-ERDAT, sy-vline,
  WA_PSBWCMPTXT-AEDAT, sy-vline,
  WA_PSBWCMPTXT-LANGU, sy-vline,
  WA_PSBWCMPTXT-TXTLG, sy-vline,
  WA_PSBWCMPTXT-TXTMD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSBWCMPTXT 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_PSBWCMPTXT 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_PSBWCMPTXT INTO WA_PSBWCMPTXT.


*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 ABPSN, internal->external for field PSPID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_PSBWCMPTXT-PSPID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSBWCMPTXT-PSPID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ABPSN, internal->external for field POSID
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_PSBWCMPTXT-POSID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSBWCMPTXT-POSID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_PSBWCMPTXT-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSBWCMPTXT-LANGU.
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_PSBWCMPTXT_STR, 
DATEFROM TYPE STRING,
DATETO TYPE STRING,
PSPID TYPE STRING,
POSID TYPE STRING,
AUFNR TYPE STRING,
COMPT TYPE STRING,
ERDAT TYPE STRING,
AEDAT TYPE STRING,
LANGU TYPE STRING,
TXTLG TYPE STRING,
TXTMD TYPE STRING,
TXTSH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSBWCMPTXT_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_PSBWCMPTXT_STR-DATEFROM sy-vline 
WA_PSBWCMPTXT_STR-DATETO sy-vline 
WA_PSBWCMPTXT_STR-PSPID sy-vline 
WA_PSBWCMPTXT_STR-POSID sy-vline 
WA_PSBWCMPTXT_STR-AUFNR sy-vline 
WA_PSBWCMPTXT_STR-COMPT sy-vline 
WA_PSBWCMPTXT_STR-ERDAT sy-vline 
WA_PSBWCMPTXT_STR-AEDAT sy-vline 
WA_PSBWCMPTXT_STR-LANGU sy-vline 
WA_PSBWCMPTXT_STR-TXTLG sy-vline 
WA_PSBWCMPTXT_STR-TXTMD sy-vline 
WA_PSBWCMPTXT_STR-TXTSH sy-vline      INTO ld_text SEPARATED BY SPACE.

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