ABAP Select data from SAP table PTRV_TRVPA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTRV_TRVPA 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_TRVPA. 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_TRVPA 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_TRVPA TYPE STANDARD TABLE OF PTRV_TRVPA,
      WA_PTRV_TRVPA TYPE PTRV_TRVPA,
      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_TRVPA> TYPE PTRV_TRVPA.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTRV_TRVPA
*  INTO TABLE @DATA(IT_PTRV_TRVPA2).
*--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_TRVPA INDEX 1 INTO DATA(WA_PTRV_TRVPA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTRV_TRVPA>-LUG = 1.
<PTRV_TRVPA>-PA3 = 1.
<PTRV_TRVPA>-EXP = 1.
<PTRV_TRVPA>-FDE = 1.
<PTRV_TRVPA>-WRP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTRV_TRVPA-OAA, sy-vline,
  WA_PTRV_TRVPA-CBW, sy-vline,
  WA_PTRV_TRVPA-FDW, sy-vline,
  WA_PTRV_TRVPA-CCC, sy-vline,
  WA_PTRV_TRVPA-WRC, sy-vline,
  WA_PTRV_TRVPA-WMC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTRV_TRVPA 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_TRVPA 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_TRVPA INTO WA_PTRV_TRVPA.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PTRV_TRVPA_STR, 
LUG TYPE STRING,
PA3 TYPE STRING,
EXP TYPE STRING,
FDE TYPE STRING,
WRP TYPE STRING,
OAA TYPE STRING,
CBW TYPE STRING,
FDW TYPE STRING,
CCC TYPE STRING,
WRC TYPE STRING,
WMC TYPE STRING,
EES TYPE STRING,
DBS TYPE STRING,
SWC TYPE STRING,
RBA TYPE STRING,
CMA TYPE STRING,
SNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTRV_TRVPA_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_TRVPA_STR-LUG sy-vline 
WA_PTRV_TRVPA_STR-PA3 sy-vline 
WA_PTRV_TRVPA_STR-EXP sy-vline 
WA_PTRV_TRVPA_STR-FDE sy-vline 
WA_PTRV_TRVPA_STR-WRP sy-vline 
WA_PTRV_TRVPA_STR-OAA sy-vline 
WA_PTRV_TRVPA_STR-CBW sy-vline 
WA_PTRV_TRVPA_STR-FDW sy-vline 
WA_PTRV_TRVPA_STR-CCC sy-vline 
WA_PTRV_TRVPA_STR-WRC sy-vline 
WA_PTRV_TRVPA_STR-WMC sy-vline 
WA_PTRV_TRVPA_STR-EES sy-vline 
WA_PTRV_TRVPA_STR-DBS sy-vline 
WA_PTRV_TRVPA_STR-SWC sy-vline 
WA_PTRV_TRVPA_STR-RBA sy-vline 
WA_PTRV_TRVPA_STR-CMA sy-vline 
WA_PTRV_TRVPA_STR-SNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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