ABAP Select data from SAP table PTRV_REQ_FOR_APPROVAL into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PTRV_REQ_FOR_APPROVAL 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_REQ_FOR_APPROVAL. 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_REQ_FOR_APPROVAL 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_REQ_FOR_APPROVAL TYPE STANDARD TABLE OF PTRV_REQ_FOR_APPROVAL,
      WA_PTRV_REQ_FOR_APPROVAL TYPE PTRV_REQ_FOR_APPROVAL,
      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_REQ_FOR_APPROVAL> TYPE PTRV_REQ_FOR_APPROVAL.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTRV_REQ_FOR_APPROVAL
*  INTO TABLE @DATA(IT_PTRV_REQ_FOR_APPROVAL2).
*--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_REQ_FOR_APPROVAL INDEX 1 INTO DATA(WA_PTRV_REQ_FOR_APPROVAL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTRV_REQ_FOR_APPROVAL>-EMPLOYEENUMBER = 1.
<PTRV_REQ_FOR_APPROVAL>-TRIPNUMBER = 1.
<PTRV_REQ_FOR_APPROVAL>-STEXT = 1.
<PTRV_REQ_FOR_APPROVAL>-DATEDEP = 1.
<PTRV_REQ_FOR_APPROVAL>-TIMEDEP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTRV_REQ_FOR_APPROVAL-DATEARR, sy-vline,
  WA_PTRV_REQ_FOR_APPROVAL-TIMEARR, sy-vline,
  WA_PTRV_REQ_FOR_APPROVAL-DESTINATION, sy-vline,
  WA_PTRV_REQ_FOR_APPROVAL-REASON, sy-vline,
  WA_PTRV_REQ_FOR_APPROVAL-COUNTRY, sy-vline,
  WA_PTRV_REQ_FOR_APPROVAL-COUNTRY_TEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTRV_REQ_FOR_APPROVAL 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_REQ_FOR_APPROVAL 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_REQ_FOR_APPROVAL INTO WA_PTRV_REQ_FOR_APPROVAL.


*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_REQ_FOR_APPROVAL_STR, 
EMPLOYEENUMBER TYPE STRING,
TRIPNUMBER TYPE STRING,
STEXT TYPE STRING,
DATEDEP TYPE STRING,
TIMEDEP TYPE STRING,
DATEARR TYPE STRING,
TIMEARR TYPE STRING,
DESTINATION TYPE STRING,
REASON TYPE STRING,
COUNTRY TYPE STRING,
COUNTRY_TEXT TYPE STRING,
ESTIMATED_COST TYPE STRING,
ESTI_COST_CURR TYPE STRING,
AMOUNT_SUM_ADVANCE TYPE STRING,
CURRENCY TYPE STRING,
NR_ATTACHMENTS TYPE STRING,
HISTORY TYPE STRING,
GWE TYPE STRING,
EDI TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PTRV_REQ_FOR_APPROVAL_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_REQ_FOR_APPROVAL_STR-EMPLOYEENUMBER sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-TRIPNUMBER sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-STEXT sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-DATEDEP sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-TIMEDEP sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-DATEARR sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-TIMEARR sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-DESTINATION sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-REASON sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-COUNTRY sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-COUNTRY_TEXT sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-ESTIMATED_COST sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-ESTI_COST_CURR sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-AMOUNT_SUM_ADVANCE sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-CURRENCY sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-NR_ATTACHMENTS sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-HISTORY sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-GWE sy-vline 
WA_PTRV_REQ_FOR_APPROVAL_STR-EDI sy-vline      INTO ld_text SEPARATED BY SPACE.

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