ABAP Select data from SAP table PSHLP_TREX_RSDB_ST into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSHLP_TREX_RSDB_ST
*  INTO TABLE @DATA(IT_PSHLP_TREX_RSDB_ST2).
*--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_PSHLP_TREX_RSDB_ST INDEX 1 INTO DATA(WA_PSHLP_TREX_RSDB_ST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSHLP_TREX_RSDB_ST>-RSNUM = 1.
<PSHLP_TREX_RSDB_ST>-RSPOS = 1.
<PSHLP_TREX_RSDB_ST>-RSART = 1.
<PSHLP_TREX_RSDB_ST>-RSINZ = 1.
<PSHLP_TREX_RSDB_ST>-PLNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSHLP_TREX_RSDB_ST-BANFN, sy-vline,
  WA_PSHLP_TREX_RSDB_ST-BNFPO, sy-vline,
  WA_PSHLP_TREX_RSDB_ST-EBELN, sy-vline,
  WA_PSHLP_TREX_RSDB_ST-EBELP, sy-vline,
  WA_PSHLP_TREX_RSDB_ST-AUFNR, sy-vline,
  WA_PSHLP_TREX_RSDB_ST-AUFPO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSHLP_TREX_RSDB_ST 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_PSHLP_TREX_RSDB_ST 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_PSHLP_TREX_RSDB_ST INTO WA_PSHLP_TREX_RSDB_ST.


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

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

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

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

*Conversion exit AOBAR, internal->external for field AOBAR
CALL FUNCTION 'CONVERSION_EXIT_AOBAR_OUTPUT'
  EXPORTING
    input =                      WA_PSHLP_TREX_RSDB_ST-AOBAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSHLP_TREX_RSDB_ST-AOBAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field ZEINH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_PSHLP_TREX_RSDB_ST-ZEINH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PSHLP_TREX_RSDB_ST-ZEINH.
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_PSHLP_TREX_RSDB_ST_STR, 
RSNUM TYPE STRING,
RSPOS TYPE STRING,
RSART TYPE STRING,
RSINZ TYPE STRING,
PLNUM TYPE STRING,
BANFN TYPE STRING,
BNFPO TYPE STRING,
EBELN TYPE STRING,
EBELP TYPE STRING,
AUFNR TYPE STRING,
AUFPO TYPE STRING,
AOBAR TYPE STRING,
ZEINH TYPE STRING,
DAUER TYPE STRING,
LOAD_UNAME TYPE STRING,
LOAD_DATE TYPE STRING,
EXPIRY_DATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSHLP_TREX_RSDB_ST_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_PSHLP_TREX_RSDB_ST_STR-RSNUM sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-RSPOS sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-RSART sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-RSINZ sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-PLNUM sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-BANFN sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-BNFPO sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-EBELN sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-EBELP sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-AUFNR sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-AUFPO sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-AOBAR sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-ZEINH sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-DAUER sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-LOAD_UNAME sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-LOAD_DATE sy-vline 
WA_PSHLP_TREX_RSDB_ST_STR-EXPIRY_DATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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