ABAP Select data from SAP table PAR01 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAR01 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 PAR01. 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 PAR01 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_PAR01 TYPE STANDARD TABLE OF PAR01,
      WA_PAR01 TYPE PAR01,
      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: <PAR01> TYPE PAR01.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PAR01.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PAR01
  INTO TABLE IT_PAR01.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAR01
*  INTO TABLE @DATA(IT_PAR012).
*--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_PAR01 INDEX 1 INTO DATA(WA_PAR012).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PAR01 ASSIGNING <PAR01>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAR01>-CCUIL = 1.
<PAR01>-OBRAS = 1.
<PAR01>-CONYU = 1.
<PAR01>-HIJOS = 1.
<PAR01>-ADHER = 1.

ENDLOOP.

LOOP AT IT_PAR01 INTO WA_PAR01.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAR01-ACTIV, sy-vline,
  WA_PAR01-PROMO, sy-vline,
  WA_PAR01-ZONDI, sy-vline,
  WA_PAR01-DISCO, sy-vline,
  WA_PAR01-ASFAM, sy-vline,
  WA_PAR01-RETOT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAR01 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_PAR01 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_PAR01 INTO WA_PAR01.


*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_PAR01_STR, 
CCUIL TYPE STRING,
OBRAS TYPE STRING,
CONYU TYPE STRING,
HIJOS TYPE STRING,
ADHER TYPE STRING,
ACTIV TYPE STRING,
PROMO TYPE STRING,
ZONDI TYPE STRING,
DISCO TYPE STRING,
ASFAM TYPE STRING,
RETOT TYPE STRING,
REISS TYPE STRING,
APJVO TYPE STRING,
REIOS TYPE STRING,
APAOS TYPE STRING,
AFZON TYPE STRING,
HIJOD TYPE STRING,
PRENA TYPE STRING,
CANAE TYPE STRING,
ZONDE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAR01_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_PAR01_STR-CCUIL sy-vline 
WA_PAR01_STR-OBRAS sy-vline 
WA_PAR01_STR-CONYU sy-vline 
WA_PAR01_STR-HIJOS sy-vline 
WA_PAR01_STR-ADHER sy-vline 
WA_PAR01_STR-ACTIV sy-vline 
WA_PAR01_STR-PROMO sy-vline 
WA_PAR01_STR-ZONDI sy-vline 
WA_PAR01_STR-DISCO sy-vline 
WA_PAR01_STR-ASFAM sy-vline 
WA_PAR01_STR-RETOT sy-vline 
WA_PAR01_STR-REISS sy-vline 
WA_PAR01_STR-APJVO sy-vline 
WA_PAR01_STR-REIOS sy-vline 
WA_PAR01_STR-APAOS sy-vline 
WA_PAR01_STR-AFZON sy-vline 
WA_PAR01_STR-HIJOD sy-vline 
WA_PAR01_STR-PRENA sy-vline 
WA_PAR01_STR-CANAE sy-vline 
WA_PAR01_STR-ZONDE sy-vline      INTO ld_text SEPARATED BY SPACE.

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