ABAP Select data from SAP table P2RN_LA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RN_LA 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 P2RN_LA. 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 P2RN_LA 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_P2RN_LA TYPE STANDARD TABLE OF P2RN_LA,
      WA_P2RN_LA TYPE P2RN_LA,
      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: <P2RN_LA> TYPE P2RN_LA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RN_LA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RN_LA
  INTO TABLE IT_P2RN_LA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RN_LA
*  INTO TABLE @DATA(IT_P2RN_LA2).
*--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_P2RN_LA INDEX 1 INTO DATA(WA_P2RN_LA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RN_LA ASSIGNING <P2RN_LA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RN_LA>-MANDT = 1.
<P2RN_LA>-DCT_PERNR = 1.
<P2RN_LA>-DCT_SEQNR = 1.
<P2RN_LA>-DCT_ROWID = 1.
<P2RN_LA>-LANSP = 1.

ENDLOOP.

LOOP AT IT_P2RN_LA INTO WA_P2RN_LA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RN_LA-BEGDA, sy-vline,
  WA_P2RN_LA-ENDDA, sy-vline,
  WA_P2RN_LA-CCOBT, sy-vline,
  WA_P2RN_LA-CFIZZ, sy-vline,
  WA_P2RN_LA-IREAP, sy-vline,
  WA_P2RN_LA-CIINV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RN_LA 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_P2RN_LA 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_P2RN_LA INTO WA_P2RN_LA.


*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_P2RN_LA_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
LANSP TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CCOBT TYPE STRING,
CFIZZ TYPE STRING,
IREAP TYPE STRING,
CIINV TYPE STRING,
IAOUK TYPE STRING,
CAARD TYPE STRING,
CAOCL TYPE STRING,
AANVU TYPE STRING,
CREIF TYPE STRING,
VERWE TYPE STRING,
VANGN TYPE STRING,
CFIFZ TYPE STRING,
CIVPL TYPE STRING,
INDDA TYPE STRING,
UITDA TYPE STRING,
CDAGH TYPE STRING,
CRGBA TYPE STRING,
NUMIV TYPE STRING,
BEGLL TYPE STRING,
ENDLL TYPE STRING,
RATLT TYPE STRING,
RATLB TYPE STRING,
TAXGR TYPE STRING,
ZVWIS TYPE STRING,
ZVWIR TYPE STRING,
DUMMY TYPE STRING,
IRSBD TYPE STRING,
IRSED TYPE STRING,
IRSTP TYPE STRING,
RATLC TYPE STRING,
COHRS TYPE STRING,
COWGE TYPE STRING,
NORSK TYPE STRING,
WSWA7 TYPE STRING,
JOBAG TYPE STRING,
MINWE TYPE STRING,
CAOCT TYPE STRING,
CREAO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RN_LA_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_P2RN_LA_STR-MANDT sy-vline 
WA_P2RN_LA_STR-DCT_PERNR sy-vline 
WA_P2RN_LA_STR-DCT_SEQNR sy-vline 
WA_P2RN_LA_STR-DCT_ROWID sy-vline 
WA_P2RN_LA_STR-LANSP sy-vline 
WA_P2RN_LA_STR-BEGDA sy-vline 
WA_P2RN_LA_STR-ENDDA sy-vline 
WA_P2RN_LA_STR-CCOBT sy-vline 
WA_P2RN_LA_STR-CFIZZ sy-vline 
WA_P2RN_LA_STR-IREAP sy-vline 
WA_P2RN_LA_STR-CIINV sy-vline 
WA_P2RN_LA_STR-IAOUK sy-vline 
WA_P2RN_LA_STR-CAARD sy-vline 
WA_P2RN_LA_STR-CAOCL sy-vline 
WA_P2RN_LA_STR-AANVU sy-vline 
WA_P2RN_LA_STR-CREIF sy-vline 
WA_P2RN_LA_STR-VERWE sy-vline 
WA_P2RN_LA_STR-VANGN sy-vline 
WA_P2RN_LA_STR-CFIFZ sy-vline 
WA_P2RN_LA_STR-CIVPL sy-vline 
WA_P2RN_LA_STR-INDDA sy-vline 
WA_P2RN_LA_STR-UITDA sy-vline 
WA_P2RN_LA_STR-CDAGH sy-vline 
WA_P2RN_LA_STR-CRGBA sy-vline 
WA_P2RN_LA_STR-NUMIV sy-vline 
WA_P2RN_LA_STR-BEGLL sy-vline 
WA_P2RN_LA_STR-ENDLL sy-vline 
WA_P2RN_LA_STR-RATLT sy-vline 
WA_P2RN_LA_STR-RATLB sy-vline 
WA_P2RN_LA_STR-TAXGR sy-vline 
WA_P2RN_LA_STR-ZVWIS sy-vline 
WA_P2RN_LA_STR-ZVWIR sy-vline 
WA_P2RN_LA_STR-DUMMY sy-vline 
WA_P2RN_LA_STR-IRSBD sy-vline 
WA_P2RN_LA_STR-IRSED sy-vline 
WA_P2RN_LA_STR-IRSTP sy-vline 
WA_P2RN_LA_STR-RATLC sy-vline 
WA_P2RN_LA_STR-COHRS sy-vline 
WA_P2RN_LA_STR-COWGE sy-vline 
WA_P2RN_LA_STR-NORSK sy-vline 
WA_P2RN_LA_STR-WSWA7 sy-vline 
WA_P2RN_LA_STR-JOBAG sy-vline 
WA_P2RN_LA_STR-MINWE sy-vline 
WA_P2RN_LA_STR-CAOCT sy-vline 
WA_P2RN_LA_STR-CREAO sy-vline      INTO ld_text SEPARATED BY SPACE.

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