ABAP Select data from SAP table PTRV_A_CHANGE into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTRV_A_CHANGE 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_A_CHANGE. 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_A_CHANGE 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_A_CHANGE TYPE STANDARD TABLE OF PTRV_A_CHANGE,
      WA_PTRV_A_CHANGE TYPE PTRV_A_CHANGE,
      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_A_CHANGE> TYPE PTRV_A_CHANGE.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTRV_A_CHANGE
*  INTO TABLE @DATA(IT_PTRV_A_CHANGE2).
*--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_A_CHANGE INDEX 1 INTO DATA(WA_PTRV_A_CHANGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTRV_A_CHANGE>-MANDT = 1.
<PTRV_A_CHANGE>-PERNR = 1.
<PTRV_A_CHANGE>-REINR = 1.
<PTRV_A_CHANGE>-PERIO = 1.
<PTRV_A_CHANGE>-PDVRS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTRV_A_CHANGE-LAST_CHANGE, sy-vline,
  WA_PTRV_A_CHANGE-CHANGE_TYPE, sy-vline,
  WA_PTRV_A_CHANGE-UNAME, sy-vline,
  WA_PTRV_A_CHANGE-REPID, sy-vline,
  WA_PTRV_A_CHANGE-DRUCK, sy-vline,
  WA_PTRV_A_CHANGE-ANTRG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTRV_A_CHANGE 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_A_CHANGE 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_A_CHANGE INTO WA_PTRV_A_CHANGE.


*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_A_CHANGE_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
REINR TYPE STRING,
PERIO TYPE STRING,
PDVRS TYPE STRING,
LAST_CHANGE TYPE STRING,
CHANGE_TYPE TYPE STRING,
UNAME TYPE STRING,
REPID TYPE STRING,
DRUCK TYPE STRING,
ANTRG TYPE STRING,
ABREC TYPE STRING,
UEBLG TYPE STRING,
UEBRF TYPE STRING,
UEBDT TYPE STRING,
RUNID TYPE STRING,
STATU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTRV_A_CHANGE_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_A_CHANGE_STR-MANDT sy-vline 
WA_PTRV_A_CHANGE_STR-PERNR sy-vline 
WA_PTRV_A_CHANGE_STR-REINR sy-vline 
WA_PTRV_A_CHANGE_STR-PERIO sy-vline 
WA_PTRV_A_CHANGE_STR-PDVRS sy-vline 
WA_PTRV_A_CHANGE_STR-LAST_CHANGE sy-vline 
WA_PTRV_A_CHANGE_STR-CHANGE_TYPE sy-vline 
WA_PTRV_A_CHANGE_STR-UNAME sy-vline 
WA_PTRV_A_CHANGE_STR-REPID sy-vline 
WA_PTRV_A_CHANGE_STR-DRUCK sy-vline 
WA_PTRV_A_CHANGE_STR-ANTRG sy-vline 
WA_PTRV_A_CHANGE_STR-ABREC sy-vline 
WA_PTRV_A_CHANGE_STR-UEBLG sy-vline 
WA_PTRV_A_CHANGE_STR-UEBRF sy-vline 
WA_PTRV_A_CHANGE_STR-UEBDT sy-vline 
WA_PTRV_A_CHANGE_STR-RUNID sy-vline 
WA_PTRV_A_CHANGE_STR-STATU sy-vline      INTO ld_text SEPARATED BY SPACE.

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