ABAP Select data from SAP table P02K_OLREP into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P02K_OLREP 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 P02K_OLREP. 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 P02K_OLREP 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_P02K_OLREP TYPE STANDARD TABLE OF P02K_OLREP,
      WA_P02K_OLREP TYPE P02K_OLREP,
      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: <P02K_OLREP> TYPE P02K_OLREP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P02K_OLREP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P02K_OLREP
  INTO TABLE IT_P02K_OLREP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P02K_OLREP
*  INTO TABLE @DATA(IT_P02K_OLREP2).
*--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_P02K_OLREP INDEX 1 INTO DATA(WA_P02K_OLREP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P02K_OLREP ASSIGNING <P02K_OLREP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P02K_OLREP>-VALTY = 1.
<P02K_OLREP>-VTEXT = 1.
<P02K_OLREP>-DOCU = 1.
<P02K_OLREP>-ID = 1.
<P02K_OLREP>-NAME = 1.

ENDLOOP.

LOOP AT IT_P02K_OLREP INTO WA_P02K_OLREP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P02K_OLREP-OLENG, sy-vline,
  WA_P02K_OLREP-BUTTON, sy-vline,
  WA_P02K_OLREP-STATUS, sy-vline,
  WA_P02K_OLREP-MESSAGE, sy-vline,
  WA_P02K_OLREP-FUNCTION, sy-vline,
  WA_P02K_OLREP-TEXTFIELD, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P02K_OLREP 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_P02K_OLREP 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_P02K_OLREP INTO WA_P02K_OLREP.


*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_P02K_OLREP_STR, 
VALTY TYPE STRING,
VTEXT TYPE STRING,
DOCU TYPE STRING,
ID TYPE STRING,
NAME TYPE STRING,
OLENG TYPE STRING,
BUTTON TYPE STRING,
STATUS TYPE STRING,
MESSAGE TYPE STRING,
FUNCTION TYPE STRING,
TEXTFIELD TYPE STRING,
INTERNAL TYPE STRING,
LOCKED TYPE STRING,
I_CLASS TYPE STRING,
I_GROUP TYPE STRING,
I_MEMBER TYPE STRING,
VALU1 TYPE STRING,
VALU2 TYPE STRING,
SEL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P02K_OLREP_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_P02K_OLREP_STR-VALTY sy-vline 
WA_P02K_OLREP_STR-VTEXT sy-vline 
WA_P02K_OLREP_STR-DOCU sy-vline 
WA_P02K_OLREP_STR-ID sy-vline 
WA_P02K_OLREP_STR-NAME sy-vline 
WA_P02K_OLREP_STR-OLENG sy-vline 
WA_P02K_OLREP_STR-BUTTON sy-vline 
WA_P02K_OLREP_STR-STATUS sy-vline 
WA_P02K_OLREP_STR-MESSAGE sy-vline 
WA_P02K_OLREP_STR-FUNCTION sy-vline 
WA_P02K_OLREP_STR-TEXTFIELD sy-vline 
WA_P02K_OLREP_STR-INTERNAL sy-vline 
WA_P02K_OLREP_STR-LOCKED sy-vline 
WA_P02K_OLREP_STR-I_CLASS sy-vline 
WA_P02K_OLREP_STR-I_GROUP sy-vline 
WA_P02K_OLREP_STR-I_MEMBER sy-vline 
WA_P02K_OLREP_STR-VALU1 sy-vline 
WA_P02K_OLREP_STR-VALU2 sy-vline 
WA_P02K_OLREP_STR-SEL sy-vline      INTO ld_text SEPARATED BY SPACE.

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