ABAP Select data from SAP table PAR42 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PAR42 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 PAR42. 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 PAR42 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_PAR42 TYPE STANDARD TABLE OF PAR42,
      WA_PAR42 TYPE PAR42,
      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: <PAR42> TYPE PAR42.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PAR42.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PAR42
  INTO TABLE IT_PAR42.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PAR42
*  INTO TABLE @DATA(IT_PAR422).
*--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_PAR42 INDEX 1 INTO DATA(WA_PAR422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PAR42 ASSIGNING <PAR42>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PAR42>-TOTAL = 1.
<PAR42>-BUKRS = 1.
<PAR42>-BUTXT = 1.
<PAR42>-REGIS = 1.
<PAR42>-PERNR = 1.

ENDLOOP.

LOOP AT IT_PAR42 INTO WA_PAR42.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PAR42-RETOT, sy-vline,
  WA_PAR42-AMT_CURR_TOT, sy-vline,
  WA_PAR42-REAOS, sy-vline,
  WA_PAR42-AMT_CURR_REA, sy-vline,
  WA_PAR42-REICO, sy-vline,
  WA_PAR42-AMT_CURR_REI, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PAR42 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_PAR42 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_PAR42 INTO WA_PAR42.


*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_PAR42_STR, 
TOTAL TYPE STRING,
BUKRS TYPE STRING,
BUTXT TYPE STRING,
REGIS TYPE STRING,
PERNR TYPE STRING,
RETOT TYPE STRING,
AMT_CURR_TOT TYPE STRING,
REAOS TYPE STRING,
AMT_CURR_REA TYPE STRING,
REICO TYPE STRING,
AMT_CURR_REI TYPE STRING,
REIM3 TYPE STRING,
AMT_CURR_RE3 TYPE STRING,
REIOS TYPE STRING,
AMT_CURR_REO 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,
IADOS TYPE STRING,
AMT_CURR_IAD TYPE STRING,
EXASS TYPE STRING,
AMT_CURR_EXA TYPE STRING,
EXAOS TYPE STRING,
AMT_CURR_EXO TYPE STRING,
TIKET TYPE STRING,
AMT_CURR_TIK TYPE STRING,
CAPRE TYPE STRING,
AMT_CURR_CAP 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,
AADSS TYPE STRING,
TCSIJ TYPE STRING,
OBRAS TYPE STRING,
ADHER TYPE STRING,
LOCTX TYPE STRING,
SINSI TYPE STRING,
CORSI TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
TIPEM TYPE STRING,
APAOS TYPE STRING,
AMT_CURR_APS TYPE STRING,
REJUB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PAR42_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_PAR42_STR-TOTAL sy-vline 
WA_PAR42_STR-BUKRS sy-vline 
WA_PAR42_STR-BUTXT sy-vline 
WA_PAR42_STR-REGIS sy-vline 
WA_PAR42_STR-PERNR sy-vline 
WA_PAR42_STR-RETOT sy-vline 
WA_PAR42_STR-AMT_CURR_TOT sy-vline 
WA_PAR42_STR-REAOS sy-vline 
WA_PAR42_STR-AMT_CURR_REA sy-vline 
WA_PAR42_STR-REICO sy-vline 
WA_PAR42_STR-AMT_CURR_REI sy-vline 
WA_PAR42_STR-REIM3 sy-vline 
WA_PAR42_STR-AMT_CURR_RE3 sy-vline 
WA_PAR42_STR-REIOS sy-vline 
WA_PAR42_STR-AMT_CURR_REO sy-vline 
WA_PAR42_STR-APJVO sy-vline 
WA_PAR42_STR-BETPE_JVO sy-vline 
WA_PAR42_STR-RTE_CURR_JVO sy-vline 
WA_PAR42_STR-AMT_CURR_JVO sy-vline 
WA_PAR42_STR-ASFAM sy-vline 
WA_PAR42_STR-BETPE_ASF sy-vline 
WA_PAR42_STR-RTE_CURR_ASF sy-vline 
WA_PAR42_STR-AMT_CURR_ASF sy-vline 
WA_PAR42_STR-IADOS sy-vline 
WA_PAR42_STR-AMT_CURR_IAD sy-vline 
WA_PAR42_STR-EXASS sy-vline 
WA_PAR42_STR-AMT_CURR_EXA sy-vline 
WA_PAR42_STR-EXAOS sy-vline 
WA_PAR42_STR-AMT_CURR_EXO sy-vline 
WA_PAR42_STR-TIKET sy-vline 
WA_PAR42_STR-AMT_CURR_TIK sy-vline 
WA_PAR42_STR-CAPRE sy-vline 
WA_PAR42_STR-AMT_CURR_CAP sy-vline 
WA_PAR42_STR-CCUIL sy-vline 
WA_PAR42_STR-NOMAP sy-vline 
WA_PAR42_STR-CONTF sy-vline 
WA_PAR42_STR-HIJOS sy-vline 
WA_PAR42_STR-SITUA sy-vline 
WA_PAR42_STR-CONDI sy-vline 
WA_PAR42_STR-ACTSI sy-vline 
WA_PAR42_STR-ZONDI sy-vline 
WA_PAR42_STR-AADSS sy-vline 
WA_PAR42_STR-TCSIJ sy-vline 
WA_PAR42_STR-OBRAS sy-vline 
WA_PAR42_STR-ADHER sy-vline 
WA_PAR42_STR-LOCTX sy-vline 
WA_PAR42_STR-SINSI sy-vline 
WA_PAR42_STR-CORSI sy-vline 
WA_PAR42_STR-BEGDA sy-vline 
WA_PAR42_STR-ENDDA sy-vline 
WA_PAR42_STR-TIPEM sy-vline 
WA_PAR42_STR-APAOS sy-vline 
WA_PAR42_STR-AMT_CURR_APS sy-vline 
WA_PAR42_STR-REJUB sy-vline      INTO ld_text SEPARATED BY SPACE.

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