ABAP Select data from SAP table P20_FRV_OUT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P20_FRV_OUT 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 P20_FRV_OUT. 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 P20_FRV_OUT 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_P20_FRV_OUT TYPE STANDARD TABLE OF P20_FRV_OUT,
      WA_P20_FRV_OUT TYPE P20_FRV_OUT,
      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: <P20_FRV_OUT> TYPE P20_FRV_OUT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P20_FRV_OUT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P20_FRV_OUT
  INTO TABLE IT_P20_FRV_OUT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P20_FRV_OUT
*  INTO TABLE @DATA(IT_P20_FRV_OUT2).
*--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_P20_FRV_OUT INDEX 1 INTO DATA(WA_P20_FRV_OUT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P20_FRV_OUT ASSIGNING <P20_FRV_OUT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P20_FRV_OUT>-PERIOD = 1.
<P20_FRV_OUT>-PTEXT = 1.
<P20_FRV_OUT>-GENDER = 1.
<P20_FRV_OUT>-GTEXT = 1.
<P20_FRV_OUT>-WORKDAYS = 1.

ENDLOOP.

LOOP AT IT_P20_FRV_OUT INTO WA_P20_FRV_OUT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P20_FRV_OUT-LOSTDAYS, sy-vline,
  WA_P20_FRV_OUT-REALDAYS, sy-vline,
  WA_P20_FRV_OUT-EGEN_SHORT, sy-vline,
  WA_P20_FRV_OUT-NUM, sy-vline,
  WA_P20_FRV_OUT-DAY, sy-vline,
  WA_P20_FRV_OUT-LEGE_SHORT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P20_FRV_OUT 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_P20_FRV_OUT 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_P20_FRV_OUT INTO WA_P20_FRV_OUT.


*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_P20_FRV_OUT_STR, 
PERIOD TYPE STRING,
PTEXT TYPE STRING,
GENDER TYPE STRING,
GTEXT TYPE STRING,
WORKDAYS TYPE STRING,
LOSTDAYS TYPE STRING,
REALDAYS TYPE STRING,
EGEN_SHORT TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
LEGE_SHORT TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
EGEN_MEDIUM TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
LEGE_MEDIUM TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
LEGE_LONG TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
GT8W TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
BARN TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
PERM TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
SKOF TYPE STRING,
NUM TYPE STRING,
DAY TYPE STRING,
PERCENT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P20_FRV_OUT_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_P20_FRV_OUT_STR-PERIOD sy-vline 
WA_P20_FRV_OUT_STR-PTEXT sy-vline 
WA_P20_FRV_OUT_STR-GENDER sy-vline 
WA_P20_FRV_OUT_STR-GTEXT sy-vline 
WA_P20_FRV_OUT_STR-WORKDAYS sy-vline 
WA_P20_FRV_OUT_STR-LOSTDAYS sy-vline 
WA_P20_FRV_OUT_STR-REALDAYS sy-vline 
WA_P20_FRV_OUT_STR-EGEN_SHORT sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-LEGE_SHORT sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-EGEN_MEDIUM sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-LEGE_MEDIUM sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-LEGE_LONG sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-GT8W sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-BARN sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-PERM sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-SKOF sy-vline 
WA_P20_FRV_OUT_STR-NUM sy-vline 
WA_P20_FRV_OUT_STR-DAY sy-vline 
WA_P20_FRV_OUT_STR-PERCENT sy-vline      INTO ld_text SEPARATED BY SPACE.

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