ABAP Select data from SAP table PSTXR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSTXR
*  INTO TABLE @DATA(IT_PSTXR2).
*--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_PSTXR INDEX 1 INTO DATA(WA_PSTXR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSTXR>-ARNUMMER = 1.
<PSTXR>-VSGRUPPE = 1.
<PSTXR>-VSNUMMER = 1.
<PSTXR>-PRCTR = 1.
<PSTXR>-KDAUF = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSTXR-KDPOS, sy-vline,
  WA_PSTXR-PSPID, sy-vline,
  WA_PSTXR-POSID, sy-vline,
  WA_PSTXR-AUFNR, sy-vline,
  WA_PSTXR-VORNR, sy-vline,
  WA_PSTXR-TXTAR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSTXR 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_PSTXR 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_PSTXR INTO WA_PSTXR.


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

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

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

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

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

*Conversion exit NUMCV, internal->external for field VORNR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_PSTXR-VORNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSTXR-VORNR.
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_PSTXR_STR, 
ARNUMMER TYPE STRING,
VSGRUPPE TYPE STRING,
VSNUMMER TYPE STRING,
PRCTR TYPE STRING,
KDAUF TYPE STRING,
KDPOS TYPE STRING,
PSPID TYPE STRING,
POSID TYPE STRING,
AUFNR TYPE STRING,
VORNR TYPE STRING,
TXTAR TYPE STRING,
TXTTI TYPE STRING,
TXTHU TYPE STRING,
TXTHD TYPE STRING,
TXTAU TYPE STRING,
TXTAD TYPE STRING,
FORMAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSTXR_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_PSTXR_STR-ARNUMMER sy-vline 
WA_PSTXR_STR-VSGRUPPE sy-vline 
WA_PSTXR_STR-VSNUMMER sy-vline 
WA_PSTXR_STR-PRCTR sy-vline 
WA_PSTXR_STR-KDAUF sy-vline 
WA_PSTXR_STR-KDPOS sy-vline 
WA_PSTXR_STR-PSPID sy-vline 
WA_PSTXR_STR-POSID sy-vline 
WA_PSTXR_STR-AUFNR sy-vline 
WA_PSTXR_STR-VORNR sy-vline 
WA_PSTXR_STR-TXTAR sy-vline 
WA_PSTXR_STR-TXTTI sy-vline 
WA_PSTXR_STR-TXTHU sy-vline 
WA_PSTXR_STR-TXTHD sy-vline 
WA_PSTXR_STR-TXTAU sy-vline 
WA_PSTXR_STR-TXTAD sy-vline 
WA_PSTXR_STR-FORMAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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