ABAP Select data from SAP table DPWTY_TREX_STRUCTURE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DPWTY_TREX_STRUCTURE
*  INTO TABLE @DATA(IT_DPWTY_TREX_STRUCTURE2).
*--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_DPWTY_TREX_STRUCTURE INDEX 1 INTO DATA(WA_DPWTY_TREX_STRUCTURE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DPWTY_TREX_STRUCTURE>-HEADER_GUID = 1.
<DPWTY_TREX_STRUCTURE>-PNTEXT = 1.
<DPWTY_TREX_STRUCTURE>-RELOB_EXT = 1.
<DPWTY_TREX_STRUCTURE>-SERNO = 1.
<DPWTY_TREX_STRUCTURE>-PARNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DPWTY_TREX_STRUCTURE-OLDCN, sy-vline,
  WA_DPWTY_TREX_STRUCTURE-ASTATE, sy-vline,
  WA_DPWTY_TREX_STRUCTURE-VALIC, sy-vline,
  WA_DPWTY_TREX_STRUCTURE-VALOC, sy-vline,
  WA_DPWTY_TREX_STRUCTURE-CLMTY, sy-vline,
  WA_DPWTY_TREX_STRUCTURE-REFNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DPWTY_TREX_STRUCTURE 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_DPWTY_TREX_STRUCTURE 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_DPWTY_TREX_STRUCTURE INTO WA_DPWTY_TREX_STRUCTURE.


*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 GERNR, internal->external for field SERNO
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_DPWTY_TREX_STRUCTURE-SERNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DPWTY_TREX_STRUCTURE-SERNO.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit ALPHA, internal->external for field V_PARNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DPWTY_TREX_STRUCTURE-V_PARNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DPWTY_TREX_STRUCTURE-V_PARNR.
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_DPWTY_TREX_STRUCTURE_STR, 
HEADER_GUID TYPE STRING,
PNTEXT TYPE STRING,
RELOB_EXT TYPE STRING,
SERNO TYPE STRING,
PARNR TYPE STRING,
OLDCN TYPE STRING,
ASTATE TYPE STRING,
VALIC TYPE STRING,
VALOC TYPE STRING,
CLMTY TYPE STRING,
REFNO TYPE STRING,
REFDT TYPE STRING,
RELTY TYPE STRING,
CLMNO TYPE STRING,
V_PARNR TYPE STRING,
V_REJCD TYPE STRING,
VALOC_CRNCY TYPE STRING,
VALIC_CRNCY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DPWTY_TREX_STRUCTURE_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_DPWTY_TREX_STRUCTURE_STR-HEADER_GUID sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-PNTEXT sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-RELOB_EXT sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-SERNO sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-PARNR sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-OLDCN sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-ASTATE sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-VALIC sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-VALOC sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-CLMTY sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-REFNO sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-REFDT sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-RELTY sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-CLMNO sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-V_PARNR sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-V_REJCD sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-VALOC_CRNCY sy-vline 
WA_DPWTY_TREX_STRUCTURE_STR-VALIC_CRNCY sy-vline      INTO ld_text SEPARATED BY SPACE.

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