ABAP Select data from SAP table P0591 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0591 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 P0591. 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 P0591 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_P0591 TYPE STANDARD TABLE OF P0591,
      WA_P0591 TYPE P0591,
      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: <P0591> TYPE P0591.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0591.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0591
  INTO TABLE IT_P0591.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0591
*  INTO TABLE @DATA(IT_P05912).
*--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_P0591 INDEX 1 INTO DATA(WA_P05912).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0591 ASSIGNING <P0591>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0591>-PERNR = 1.
<P0591>-INFTY = 1.
<P0591>-SUBTY = 1.
<P0591>-OBJPS = 1.
<P0591>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0591 INTO WA_P0591.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0591-ENDDA, sy-vline,
  WA_P0591-BEGDA, sy-vline,
  WA_P0591-SEQNR, sy-vline,
  WA_P0591-AEDTM, sy-vline,
  WA_P0591-UNAME, sy-vline,
  WA_P0591-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0591 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_P0591 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_P0591 INTO WA_P0591.


*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_P0591_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,
BNTYP TYPE STRING,
NAM01 TYPE STRING,
ADD01 TYPE STRING,
REL01 TYPE STRING,
DAT01 TYPE STRING,
SHP01 TYPE STRING,
GRA01 TYPE STRING,
NAM02 TYPE STRING,
ADD02 TYPE STRING,
REL02 TYPE STRING,
DAT02 TYPE STRING,
SHP02 TYPE STRING,
GRA02 TYPE STRING,
NAM03 TYPE STRING,
ADD03 TYPE STRING,
REL03 TYPE STRING,
DAT03 TYPE STRING,
SHP03 TYPE STRING,
GRA03 TYPE STRING,
NAM04 TYPE STRING,
ADD04 TYPE STRING,
REL04 TYPE STRING,
DAT04 TYPE STRING,
SHP04 TYPE STRING,
GRA04 TYPE STRING,
NAM05 TYPE STRING,
ADD05 TYPE STRING,
REL05 TYPE STRING,
DAT05 TYPE STRING,
SHP05 TYPE STRING,
GRA05 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0591_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_P0591_STR-PERNR sy-vline 
WA_P0591_STR-INFTY sy-vline 
WA_P0591_STR-SUBTY sy-vline 
WA_P0591_STR-OBJPS sy-vline 
WA_P0591_STR-SPRPS sy-vline 
WA_P0591_STR-ENDDA sy-vline 
WA_P0591_STR-BEGDA sy-vline 
WA_P0591_STR-SEQNR sy-vline 
WA_P0591_STR-AEDTM sy-vline 
WA_P0591_STR-UNAME sy-vline 
WA_P0591_STR-HISTO sy-vline 
WA_P0591_STR-ITXEX sy-vline 
WA_P0591_STR-REFEX sy-vline 
WA_P0591_STR-ORDEX sy-vline 
WA_P0591_STR-ITBLD sy-vline 
WA_P0591_STR-PREAS sy-vline 
WA_P0591_STR-FLAG1 sy-vline 
WA_P0591_STR-FLAG2 sy-vline 
WA_P0591_STR-FLAG3 sy-vline 
WA_P0591_STR-FLAG4 sy-vline 
WA_P0591_STR-RESE1 sy-vline 
WA_P0591_STR-RESE2 sy-vline 
WA_P0591_STR-GRPVL sy-vline 
WA_P0591_STR-BNTYP sy-vline 
WA_P0591_STR-NAM01 sy-vline 
WA_P0591_STR-ADD01 sy-vline 
WA_P0591_STR-REL01 sy-vline 
WA_P0591_STR-DAT01 sy-vline 
WA_P0591_STR-SHP01 sy-vline 
WA_P0591_STR-GRA01 sy-vline 
WA_P0591_STR-NAM02 sy-vline 
WA_P0591_STR-ADD02 sy-vline 
WA_P0591_STR-REL02 sy-vline 
WA_P0591_STR-DAT02 sy-vline 
WA_P0591_STR-SHP02 sy-vline 
WA_P0591_STR-GRA02 sy-vline 
WA_P0591_STR-NAM03 sy-vline 
WA_P0591_STR-ADD03 sy-vline 
WA_P0591_STR-REL03 sy-vline 
WA_P0591_STR-DAT03 sy-vline 
WA_P0591_STR-SHP03 sy-vline 
WA_P0591_STR-GRA03 sy-vline 
WA_P0591_STR-NAM04 sy-vline 
WA_P0591_STR-ADD04 sy-vline 
WA_P0591_STR-REL04 sy-vline 
WA_P0591_STR-DAT04 sy-vline 
WA_P0591_STR-SHP04 sy-vline 
WA_P0591_STR-GRA04 sy-vline 
WA_P0591_STR-NAM05 sy-vline 
WA_P0591_STR-ADD05 sy-vline 
WA_P0591_STR-REL05 sy-vline 
WA_P0591_STR-DAT05 sy-vline 
WA_P0591_STR-SHP05 sy-vline 
WA_P0591_STR-GRA05 sy-vline      INTO ld_text SEPARATED BY SPACE.

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