ABAP Select data from SAP table PTRV_TRAVEL_ITM_S into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTRV_TRAVEL_ITM_S
*  INTO TABLE @DATA(IT_PTRV_TRAVEL_ITM_S2).
*--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_PTRV_TRAVEL_ITM_S INDEX 1 INTO DATA(WA_PTRV_TRAVEL_ITM_S2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTRV_TRAVEL_ITM_S>-OBJ_TYPE = 1.
<PTRV_TRAVEL_ITM_S>-OBJ_KEY = 1.
<PTRV_TRAVEL_ITM_S>-OBJ_SYS = 1.
<PTRV_TRAVEL_ITM_S>-OBJ_POS = 1.
<PTRV_TRAVEL_ITM_S>-OBJ_ID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTRV_TRAVEL_ITM_S-PSTNG_DATE, sy-vline,
  WA_PTRV_TRAVEL_ITM_S-COMP_CODE, sy-vline,
  WA_PTRV_TRAVEL_ITM_S-GL_ACCOUNT, sy-vline,
  WA_PTRV_TRAVEL_ITM_S-NETWORK, sy-vline,
  WA_PTRV_TRAVEL_ITM_S-ORDERID, sy-vline,
  WA_PTRV_TRAVEL_ITM_S-WBS_ELEMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTRV_TRAVEL_ITM_S 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_PTRV_TRAVEL_ITM_S 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_PTRV_TRAVEL_ITM_S INTO WA_PTRV_TRAVEL_ITM_S.


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

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

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

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

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

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

*Conversion exit FMCIS, internal->external for field CMMT_ITEM
CALL FUNCTION 'CONVERSION_EXIT_FMCIS_OUTPUT'
  EXPORTING
    input =                      WA_PTRV_TRAVEL_ITM_S-CMMT_ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTRV_TRAVEL_ITM_S-CMMT_ITEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit FMCIL, internal->external for field CMMT_ITEM_LONG
CALL FUNCTION 'CONVERSION_EXIT_FMCIL_OUTPUT'
  EXPORTING
    input =                      WA_PTRV_TRAVEL_ITM_S-CMMT_ITEM_LONG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTRV_TRAVEL_ITM_S-CMMT_ITEM_LONG.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field ACTIVITY_NR
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_PTRV_TRAVEL_ITM_S-ACTIVITY_NR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTRV_TRAVEL_ITM_S-ACTIVITY_NR.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit ABPSP, internal->external for field POSNR
CALL FUNCTION 'CONVERSION_EXIT_ABPSP_OUTPUT'
  EXPORTING
    input =                      WA_PTRV_TRAVEL_ITM_S-POSNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTRV_TRAVEL_ITM_S-POSNR.
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_PTRV_TRAVEL_ITM_S_STR, 
OBJ_TYPE TYPE STRING,
OBJ_KEY TYPE STRING,
OBJ_SYS TYPE STRING,
OBJ_POS TYPE STRING,
OBJ_ID TYPE STRING,
PSTNG_DATE TYPE STRING,
COMP_CODE TYPE STRING,
GL_ACCOUNT TYPE STRING,
NETWORK TYPE STRING,
ORDERID TYPE STRING,
WBS_ELEMENT TYPE STRING,
COSTCENTER TYPE STRING,
SEG_TEXT TYPE STRING,
DELETE_IND TYPE STRING,
CMMT_ITEM TYPE STRING,
FUND TYPE STRING,
FUNDS_CTR TYPE STRING,
APPROVED TYPE STRING,
CMMT_ITEM_LONG TYPE STRING,
GRANT_NBR TYPE STRING,
FUNC_AREA_LONG TYPE STRING,
FM_TRANS_DATE TYPE STRING,
FUND_LONG TYPE STRING,
BUDGET_PERIOD TYPE STRING,
ACTIVITY_NR TYPE STRING,
CO_BUSPROC TYPE STRING,
RES_DOC TYPE STRING,
RES_ITM TYPE STRING,
COMPL_IND TYPE STRING,
POSNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTRV_TRAVEL_ITM_S_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_PTRV_TRAVEL_ITM_S_STR-OBJ_TYPE sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-OBJ_KEY sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-OBJ_SYS sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-OBJ_POS sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-OBJ_ID sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-PSTNG_DATE sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-COMP_CODE sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-GL_ACCOUNT sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-NETWORK sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-ORDERID sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-WBS_ELEMENT sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-COSTCENTER sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-SEG_TEXT sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-DELETE_IND sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-CMMT_ITEM sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-FUND sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-FUNDS_CTR sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-APPROVED sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-CMMT_ITEM_LONG sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-GRANT_NBR sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-FUNC_AREA_LONG sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-FM_TRANS_DATE sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-FUND_LONG sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-BUDGET_PERIOD sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-ACTIVITY_NR sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-CO_BUSPROC sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-RES_DOC sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-RES_ITM sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-COMPL_IND sy-vline 
WA_PTRV_TRAVEL_ITM_S_STR-POSNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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