ABAP Select data from SAP table BAPI_PTP42 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP BAPI_PTP42 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 BAPI_PTP42. 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 BAPI_PTP42 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_BAPI_PTP42 TYPE STANDARD TABLE OF BAPI_PTP42,
      WA_BAPI_PTP42 TYPE BAPI_PTP42,
      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: <BAPI_PTP42> TYPE BAPI_PTP42.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_BAPI_PTP42.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM BAPI_PTP42
  INTO TABLE IT_BAPI_PTP42.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_PTP42
*  INTO TABLE @DATA(IT_BAPI_PTP422).
*--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_BAPI_PTP42 INDEX 1 INTO DATA(WA_BAPI_PTP422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_BAPI_PTP42 ASSIGNING <BAPI_PTP42>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_PTP42>-PERSON_NO = 1.
<BAPI_PTP42>-TRIPNO = 1.
<BAPI_PTP42>-TRAVEL_PERIOD_NO = 1.
<BAPI_PTP42>-PERIOD_VERSION = 1.
<BAPI_PTP42>-HEADER_VERSION = 1.

ENDLOOP.

LOOP AT IT_BAPI_PTP42 INTO WA_BAPI_PTP42.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_PTP42-DEP_DATE, sy-vline,
  WA_BAPI_PTP42-DEP_TIME, sy-vline,
  WA_BAPI_PTP42-ARR_DATE, sy-vline,
  WA_BAPI_PTP42-ARR_TIME, sy-vline,
  WA_BAPI_PTP42-PRINTED, sy-vline,
  WA_BAPI_PTP42-APPROVED, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_PTP42 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_BAPI_PTP42 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_BAPI_PTP42 INTO WA_BAPI_PTP42.


*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 GJAHR, internal->external for field PAYROLL_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_PTP42-PAYROLL_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_PTP42-PAYROLL_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field PAYROLL_YEAR_2
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_PTP42-PAYROLL_YEAR_2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_PTP42-PAYROLL_YEAR_2.
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_BAPI_PTP42_STR, 
PERSON_NO TYPE STRING,
TRIPNO TYPE STRING,
TRAVEL_PERIOD_NO TYPE STRING,
PERIOD_VERSION TYPE STRING,
HEADER_VERSION TYPE STRING,
DEP_DATE TYPE STRING,
DEP_TIME TYPE STRING,
ARR_DATE TYPE STRING,
ARR_TIME TYPE STRING,
PRINTED TYPE STRING,
APPROVED TYPE STRING,
ACCOUNT TYPE STRING,
TRAN_PAY TYPE STRING,
TRAN_FI TYPE STRING,
TRAN_DME TYPE STRING,
CHECK_TRAVEL_LOCKED TYPE STRING,
CURRENCY TYPE STRING,
CURRENCY_ISO TYPE STRING,
PAYROLL_YEAR TYPE STRING,
PAYROLL_PERIOD TYPE STRING,
PERIOD_MODIFIER TYPE STRING,
PAYROLL_AREA TYPE STRING,
BEGIN_ACCOUNTING_PERIOD TYPE STRING,
END_ACCOUNTING_PERIOD TYPE STRING,
PAYROLL_YEAR_2 TYPE STRING,
PAYROLL_PERIOD_2 TYPE STRING,
PERIOD_MODIFIER_2 TYPE STRING,
PAYROLL_AREA_2 TYPE STRING,
BEGIN_ACCOUNTING_PERIOD_2 TYPE STRING,
END_ACCOUNTING_PERIOD_2 TYPE STRING,
DATE_TRAVEL_ACCOUNTING TYPE STRING,
TIME_TRAVEL_ACCOUNTING TYPE STRING,
ID_OF_POSTING_RUN TYPE STRING,
PD_MEALS TYPE STRING,
PD_ACCOM TYPE STRING,
NO_NIGHT TYPE STRING,
NO_MILES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_PTP42_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_BAPI_PTP42_STR-PERSON_NO sy-vline 
WA_BAPI_PTP42_STR-TRIPNO sy-vline 
WA_BAPI_PTP42_STR-TRAVEL_PERIOD_NO sy-vline 
WA_BAPI_PTP42_STR-PERIOD_VERSION sy-vline 
WA_BAPI_PTP42_STR-HEADER_VERSION sy-vline 
WA_BAPI_PTP42_STR-DEP_DATE sy-vline 
WA_BAPI_PTP42_STR-DEP_TIME sy-vline 
WA_BAPI_PTP42_STR-ARR_DATE sy-vline 
WA_BAPI_PTP42_STR-ARR_TIME sy-vline 
WA_BAPI_PTP42_STR-PRINTED sy-vline 
WA_BAPI_PTP42_STR-APPROVED sy-vline 
WA_BAPI_PTP42_STR-ACCOUNT sy-vline 
WA_BAPI_PTP42_STR-TRAN_PAY sy-vline 
WA_BAPI_PTP42_STR-TRAN_FI sy-vline 
WA_BAPI_PTP42_STR-TRAN_DME sy-vline 
WA_BAPI_PTP42_STR-CHECK_TRAVEL_LOCKED sy-vline 
WA_BAPI_PTP42_STR-CURRENCY sy-vline 
WA_BAPI_PTP42_STR-CURRENCY_ISO sy-vline 
WA_BAPI_PTP42_STR-PAYROLL_YEAR sy-vline 
WA_BAPI_PTP42_STR-PAYROLL_PERIOD sy-vline 
WA_BAPI_PTP42_STR-PERIOD_MODIFIER sy-vline 
WA_BAPI_PTP42_STR-PAYROLL_AREA sy-vline 
WA_BAPI_PTP42_STR-BEGIN_ACCOUNTING_PERIOD sy-vline 
WA_BAPI_PTP42_STR-END_ACCOUNTING_PERIOD sy-vline 
WA_BAPI_PTP42_STR-PAYROLL_YEAR_2 sy-vline 
WA_BAPI_PTP42_STR-PAYROLL_PERIOD_2 sy-vline 
WA_BAPI_PTP42_STR-PERIOD_MODIFIER_2 sy-vline 
WA_BAPI_PTP42_STR-PAYROLL_AREA_2 sy-vline 
WA_BAPI_PTP42_STR-BEGIN_ACCOUNTING_PERIOD_2 sy-vline 
WA_BAPI_PTP42_STR-END_ACCOUNTING_PERIOD_2 sy-vline 
WA_BAPI_PTP42_STR-DATE_TRAVEL_ACCOUNTING sy-vline 
WA_BAPI_PTP42_STR-TIME_TRAVEL_ACCOUNTING sy-vline 
WA_BAPI_PTP42_STR-ID_OF_POSTING_RUN sy-vline 
WA_BAPI_PTP42_STR-PD_MEALS sy-vline 
WA_BAPI_PTP42_STR-PD_ACCOM sy-vline 
WA_BAPI_PTP42_STR-NO_NIGHT sy-vline 
WA_BAPI_PTP42_STR-NO_MILES sy-vline      INTO ld_text SEPARATED BY SPACE.

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