ABAP Select data from SAP table PAR37 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAR37 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 PAR37. 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 PAR37 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_PAR37 TYPE STANDARD TABLE OF PAR37,
      WA_PAR37 TYPE PAR37,
      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: <PAR37> TYPE PAR37.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PAR37.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PAR37
  INTO TABLE IT_PAR37.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAR37
*  INTO TABLE @DATA(IT_PAR372).
*--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_PAR37 INDEX 1 INTO DATA(WA_PAR372).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PAR37 ASSIGNING <PAR37>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAR37>-CCUIL = 1.
<PAR37>-NOMAP = 1.
<PAR37>-CONTF = 1.
<PAR37>-HIJOS = 1.
<PAR37>-SITUA = 1.

ENDLOOP.

LOOP AT IT_PAR37 INTO WA_PAR37.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAR37-CONDI, sy-vline,
  WA_PAR37-ACTSI, sy-vline,
  WA_PAR37-ZONDI, sy-vline,
  WA_PAR37-AADSS, sy-vline,
  WA_PAR37-TCSIJ, sy-vline,
  WA_PAR37-OBRAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAR37 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_PAR37 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_PAR37 INTO WA_PAR37.


*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_PAR37_STR, 
CCUIL TYPE STRING,
NOMAP TYPE STRING,
CONTF TYPE STRING,
HIJOS TYPE STRING,
SITUA TYPE STRING,
CONDI TYPE STRING,
ACTSI TYPE STRING,
ZONDI TYPE STRING,
AADSS TYPE STRING,
TCSIJ TYPE STRING,
OBRAS TYPE STRING,
ADHER TYPE STRING,
RETOT TYPE STRING,
REAOS TYPE STRING,
ASFAM TYPE STRING,
APJVO TYPE STRING,
IADOS TYPE STRING,
EXASS TYPE STRING,
EXAOS TYPE STRING,
LOCTX TYPE STRING,
REICO TYPE STRING,
REIM3 TYPE STRING,
REIOS TYPE STRING,
SINSI TYPE STRING,
CORSI TYPE STRING,
CAPRE TYPE STRING,
TIPEM TYPE STRING,
APAOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAR37_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_PAR37_STR-CCUIL sy-vline 
WA_PAR37_STR-NOMAP sy-vline 
WA_PAR37_STR-CONTF sy-vline 
WA_PAR37_STR-HIJOS sy-vline 
WA_PAR37_STR-SITUA sy-vline 
WA_PAR37_STR-CONDI sy-vline 
WA_PAR37_STR-ACTSI sy-vline 
WA_PAR37_STR-ZONDI sy-vline 
WA_PAR37_STR-AADSS sy-vline 
WA_PAR37_STR-TCSIJ sy-vline 
WA_PAR37_STR-OBRAS sy-vline 
WA_PAR37_STR-ADHER sy-vline 
WA_PAR37_STR-RETOT sy-vline 
WA_PAR37_STR-REAOS sy-vline 
WA_PAR37_STR-ASFAM sy-vline 
WA_PAR37_STR-APJVO sy-vline 
WA_PAR37_STR-IADOS sy-vline 
WA_PAR37_STR-EXASS sy-vline 
WA_PAR37_STR-EXAOS sy-vline 
WA_PAR37_STR-LOCTX sy-vline 
WA_PAR37_STR-REICO sy-vline 
WA_PAR37_STR-REIM3 sy-vline 
WA_PAR37_STR-REIOS sy-vline 
WA_PAR37_STR-SINSI sy-vline 
WA_PAR37_STR-CORSI sy-vline 
WA_PAR37_STR-CAPRE sy-vline 
WA_PAR37_STR-TIPEM sy-vline 
WA_PAR37_STR-APAOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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