ABAP Select data from SAP table PAR29 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAR29 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 PAR29. 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 PAR29 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_PAR29 TYPE STANDARD TABLE OF PAR29,
      WA_PAR29 TYPE PAR29,
      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: <PAR29> TYPE PAR29.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PAR29.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PAR29
  INTO TABLE IT_PAR29.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAR29
*  INTO TABLE @DATA(IT_PAR292).
*--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_PAR29 INDEX 1 INTO DATA(WA_PAR292).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PAR29 ASSIGNING <PAR29>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAR29>-TOTAL = 1.
<PAR29>-BUKRS = 1.
<PAR29>-BUTXT = 1.
<PAR29>-REGIS = 1.
<PAR29>-PERNR = 1.

ENDLOOP.

LOOP AT IT_PAR29 INTO WA_PAR29.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAR29-RETOT, sy-vline,
  WA_PAR29-AMT_CURR_TOT, sy-vline,
  WA_PAR29-REISS, sy-vline,
  WA_PAR29-AMT_CURR_ISS, sy-vline,
  WA_PAR29-APJVO, sy-vline,
  WA_PAR29-BETPE_JVO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAR29 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_PAR29 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_PAR29 INTO WA_PAR29.


*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_PAR29_STR, 
TOTAL TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
REGIS TYPE STRING,
PERNR TYPE STRING,
RETOT TYPE STRING,
AMT_CURR_TOT TYPE STRING,
REISS TYPE STRING,
AMT_CURR_ISS TYPE STRING,
APJVO TYPE STRING,
BETPE_JVO TYPE STRING,
RTE_CURR_JVO TYPE STRING,
AMT_CURR_JVO TYPE STRING,
ASFAM TYPE STRING,
BETPE_ASF TYPE STRING,
RTE_CURR_ASF TYPE STRING,
AMT_CURR_ASF TYPE STRING,
TIKET TYPE STRING,
AMT_CURR_TIK TYPE STRING,
CCUIL TYPE STRING,
NOMAP TYPE STRING,
CONTF TYPE STRING,
HIJOS TYPE STRING,
SITUA TYPE STRING,
CONDI TYPE STRING,
ACTSI TYPE STRING,
ZONDI TYPE STRING,
TCSIJ TYPE STRING,
OBRAS TYPE STRING,
ADHER TYPE STRING,
LOCTX TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAR29_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_PAR29_STR-TOTAL sy-vline 
WA_PAR29_STR-BUKRS sy-vline 
WA_PAR29_STR-BUTXT sy-vline 
WA_PAR29_STR-REGIS sy-vline 
WA_PAR29_STR-PERNR sy-vline 
WA_PAR29_STR-RETOT sy-vline 
WA_PAR29_STR-AMT_CURR_TOT sy-vline 
WA_PAR29_STR-REISS sy-vline 
WA_PAR29_STR-AMT_CURR_ISS sy-vline 
WA_PAR29_STR-APJVO sy-vline 
WA_PAR29_STR-BETPE_JVO sy-vline 
WA_PAR29_STR-RTE_CURR_JVO sy-vline 
WA_PAR29_STR-AMT_CURR_JVO sy-vline 
WA_PAR29_STR-ASFAM sy-vline 
WA_PAR29_STR-BETPE_ASF sy-vline 
WA_PAR29_STR-RTE_CURR_ASF sy-vline 
WA_PAR29_STR-AMT_CURR_ASF sy-vline 
WA_PAR29_STR-TIKET sy-vline 
WA_PAR29_STR-AMT_CURR_TIK sy-vline 
WA_PAR29_STR-CCUIL sy-vline 
WA_PAR29_STR-NOMAP sy-vline 
WA_PAR29_STR-CONTF sy-vline 
WA_PAR29_STR-HIJOS sy-vline 
WA_PAR29_STR-SITUA sy-vline 
WA_PAR29_STR-CONDI sy-vline 
WA_PAR29_STR-ACTSI sy-vline 
WA_PAR29_STR-ZONDI sy-vline 
WA_PAR29_STR-TCSIJ sy-vline 
WA_PAR29_STR-OBRAS sy-vline 
WA_PAR29_STR-ADHER sy-vline 
WA_PAR29_STR-LOCTX sy-vline 
WA_PAR29_STR-BEGDA sy-vline 
WA_PAR29_STR-ENDDA sy-vline      INTO ld_text SEPARATED BY SPACE.

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