ABAP Select data from SAP table PAR02 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAR02 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 PAR02. 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 PAR02 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_PAR02 TYPE STANDARD TABLE OF PAR02,
      WA_PAR02 TYPE PAR02,
      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: <PAR02> TYPE PAR02.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PAR02.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PAR02
  INTO TABLE IT_PAR02.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAR02
*  INTO TABLE @DATA(IT_PAR022).
*--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_PAR02 INDEX 1 INTO DATA(WA_PAR022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PAR02 ASSIGNING <PAR02>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAR02>-FERET = 1.
<PAR02>-BLAN1 = 1.
<PAR02>-REGIM = 1.
<PAR02>-BLAN2 = 1.
<PAR02>-TIPID = 1.

ENDLOOP.

LOOP AT IT_PAR02 INTO WA_PAR02.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAR02-BLAN3, sy-vline,
  WA_PAR02-CCUIL, sy-vline,
  WA_PAR02-BLAN4, sy-vline,
  WA_PAR02-RETEN, sy-vline,
  WA_PAR02-BLAN5, sy-vline,
  WA_PAR02-REDEV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAR02 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_PAR02 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_PAR02 INTO WA_PAR02.


*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_PAR02_STR, 
FERET TYPE STRING,
BLAN1 TYPE STRING,
REGIM TYPE STRING,
BLAN2 TYPE STRING,
TIPID TYPE STRING,
BLAN3 TYPE STRING,
CCUIL TYPE STRING,
BLAN4 TYPE STRING,
RETEN TYPE STRING,
BLAN5 TYPE STRING,
REDEV TYPE STRING,
SPA16 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAR02_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_PAR02_STR-FERET sy-vline 
WA_PAR02_STR-BLAN1 sy-vline 
WA_PAR02_STR-REGIM sy-vline 
WA_PAR02_STR-BLAN2 sy-vline 
WA_PAR02_STR-TIPID sy-vline 
WA_PAR02_STR-BLAN3 sy-vline 
WA_PAR02_STR-CCUIL sy-vline 
WA_PAR02_STR-BLAN4 sy-vline 
WA_PAR02_STR-RETEN sy-vline 
WA_PAR02_STR-BLAN5 sy-vline 
WA_PAR02_STR-REDEV sy-vline 
WA_PAR02_STR-SPA16 sy-vline      INTO ld_text SEPARATED BY SPACE.

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