ABAP Select data from SAP table P0271 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0271 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 P0271. 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 P0271 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_P0271 TYPE STANDARD TABLE OF P0271,
      WA_P0271 TYPE P0271,
      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: <P0271> TYPE P0271.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0271.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0271
  INTO TABLE IT_P0271.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0271
*  INTO TABLE @DATA(IT_P02712).
*--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_P0271 INDEX 1 INTO DATA(WA_P02712).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0271 ASSIGNING <P0271>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0271>-PERNR = 1.
<P0271>-INFTY = 1.
<P0271>-SUBTY = 1.
<P0271>-OBJPS = 1.
<P0271>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0271 INTO WA_P0271.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0271-ENDDA, sy-vline,
  WA_P0271-BEGDA, sy-vline,
  WA_P0271-SEQNR, sy-vline,
  WA_P0271-AEDTM, sy-vline,
  WA_P0271-UNAME, sy-vline,
  WA_P0271-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0271 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_P0271 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_P0271 INTO WA_P0271.


*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.

*Conversion exit GJAHR, internal->external for field ERWJH
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_P0271-ERWJH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P0271-ERWJH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field JDPRZ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_P0271-JDPRZ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P0271-JDPRZ.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field JDPRL
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_P0271-JDPRL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P0271-JDPRL.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P0271_STR, 
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
HISTO TYPE STRING,
ITXEX TYPE STRING,
REFEX TYPE STRING,
ORDEX TYPE STRING,
ITBLD TYPE STRING,
PREAS TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
RESE1 TYPE STRING,
RESE2 TYPE STRING,
GRPVL TYPE STRING,
VBWZL TYPE STRING,
VBWNE TYPE STRING,
VBWAN TYPE STRING,
VBW02 TYPE STRING,
VBUEB TYPE STRING,
STPRT TYPE STRING,
STTZK TYPE STRING,
AUSK1 TYPE STRING,
AUSK2 TYPE STRING,
AUSK3 TYPE STRING,
AUSK4 TYPE STRING,
AUSK5 TYPE STRING,
LFBGR TYPE STRING,
ENSTU TYPE STRING,
STEHS TYPE STRING,
ANSTU TYPE STRING,
AFRDV TYPE STRING,
STEVS TYPE STRING,
BSTND TYPE STRING,
PZHLA TYPE STRING,
PENRA TYPE STRING,
GRDEV TYPE STRING,
HHABS TYPE STRING,
HNUMM TYPE STRING,
SLAND TYPE STRING,
ERWJH TYPE STRING,
STDBR TYPE STRING,
ARTQP TYPE STRING,
ARTQV TYPE STRING,
POSHL TYPE STRING,
JDPRZ TYPE STRING,
JDPRL TYPE STRING,
VQPLZ TYPE STRING,
ANSTUP TYPE STRING,
FACHDH TYPE STRING,
ARZTGEBIETSCHWERPUNKT TYPE STRING,
ARZTFUNKTION TYPE STRING,
NICHTARZTBERUF TYPE STRING,
NICHTARZTFUNKTION TYPE STRING,
FACHABT_PFLKRAEFTE_KH TYPE STRING,
WEITERBILDUNG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0271_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_P0271_STR-PERNR sy-vline 
WA_P0271_STR-INFTY sy-vline 
WA_P0271_STR-SUBTY sy-vline 
WA_P0271_STR-OBJPS sy-vline 
WA_P0271_STR-SPRPS sy-vline 
WA_P0271_STR-ENDDA sy-vline 
WA_P0271_STR-BEGDA sy-vline 
WA_P0271_STR-SEQNR sy-vline 
WA_P0271_STR-AEDTM sy-vline 
WA_P0271_STR-UNAME sy-vline 
WA_P0271_STR-HISTO sy-vline 
WA_P0271_STR-ITXEX sy-vline 
WA_P0271_STR-REFEX sy-vline 
WA_P0271_STR-ORDEX sy-vline 
WA_P0271_STR-ITBLD sy-vline 
WA_P0271_STR-PREAS sy-vline 
WA_P0271_STR-FLAG1 sy-vline 
WA_P0271_STR-FLAG2 sy-vline 
WA_P0271_STR-FLAG3 sy-vline 
WA_P0271_STR-FLAG4 sy-vline 
WA_P0271_STR-RESE1 sy-vline 
WA_P0271_STR-RESE2 sy-vline 
WA_P0271_STR-GRPVL sy-vline 
WA_P0271_STR-VBWZL sy-vline 
WA_P0271_STR-VBWNE sy-vline 
WA_P0271_STR-VBWAN sy-vline 
WA_P0271_STR-VBW02 sy-vline 
WA_P0271_STR-VBUEB sy-vline 
WA_P0271_STR-STPRT sy-vline 
WA_P0271_STR-STTZK sy-vline 
WA_P0271_STR-AUSK1 sy-vline 
WA_P0271_STR-AUSK2 sy-vline 
WA_P0271_STR-AUSK3 sy-vline 
WA_P0271_STR-AUSK4 sy-vline 
WA_P0271_STR-AUSK5 sy-vline 
WA_P0271_STR-LFBGR sy-vline 
WA_P0271_STR-ENSTU sy-vline 
WA_P0271_STR-STEHS sy-vline 
WA_P0271_STR-ANSTU sy-vline 
WA_P0271_STR-AFRDV sy-vline 
WA_P0271_STR-STEVS sy-vline 
WA_P0271_STR-BSTND sy-vline 
WA_P0271_STR-PZHLA sy-vline 
WA_P0271_STR-PENRA sy-vline 
WA_P0271_STR-GRDEV sy-vline 
WA_P0271_STR-HHABS sy-vline 
WA_P0271_STR-HNUMM sy-vline 
WA_P0271_STR-SLAND sy-vline 
WA_P0271_STR-ERWJH sy-vline 
WA_P0271_STR-STDBR sy-vline 
WA_P0271_STR-ARTQP sy-vline 
WA_P0271_STR-ARTQV sy-vline 
WA_P0271_STR-POSHL sy-vline 
WA_P0271_STR-JDPRZ sy-vline 
WA_P0271_STR-JDPRL sy-vline 
WA_P0271_STR-VQPLZ sy-vline 
WA_P0271_STR-ANSTUP sy-vline 
WA_P0271_STR-FACHDH sy-vline 
WA_P0271_STR-ARZTGEBIETSCHWERPUNKT sy-vline 
WA_P0271_STR-ARZTFUNKTION sy-vline 
WA_P0271_STR-NICHTARZTBERUF sy-vline 
WA_P0271_STR-NICHTARZTFUNKTION sy-vline 
WA_P0271_STR-FACHABT_PFLKRAEFTE_KH sy-vline 
WA_P0271_STR-WEITERBILDUNG sy-vline      INTO ld_text SEPARATED BY SPACE.

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