ABAP Select data from SAP table P23ABS_LIST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P23ABS_LIST 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 P23ABS_LIST. 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 P23ABS_LIST 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_P23ABS_LIST TYPE STANDARD TABLE OF P23ABS_LIST,
      WA_P23ABS_LIST TYPE P23ABS_LIST,
      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: <P23ABS_LIST> TYPE P23ABS_LIST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P23ABS_LIST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P23ABS_LIST
  INTO TABLE IT_P23ABS_LIST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P23ABS_LIST
*  INTO TABLE @DATA(IT_P23ABS_LIST2).
*--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_P23ABS_LIST INDEX 1 INTO DATA(WA_P23ABS_LIST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P23ABS_LIST ASSIGNING <P23ABS_LIST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P23ABS_LIST>-PERNR = 1.
<P23ABS_LIST>-PCBEG = 1.
<P23ABS_LIST>-PCEND = 1.
<P23ABS_LIST>-AWART = 1.
<P23ABS_LIST>-ABETP = 1.

ENDLOOP.

LOOP AT IT_P23ABS_LIST INTO WA_P23ABS_LIST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P23ABS_LIST-PSARB, sy-vline,
  WA_P23ABS_LIST-PARTD, sy-vline,
  WA_P23ABS_LIST-DYNNR, sy-vline,
  WA_P23ABS_LIST-OBEGDA, sy-vline,
  WA_P23ABS_LIST-OENDDA, sy-vline,
  WA_P23ABS_LIST-NBEGDA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P23ABS_LIST 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_P23ABS_LIST 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_P23ABS_LIST INTO WA_P23ABS_LIST.


*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_P23ABS_LIST_STR, 
PERNR TYPE STRING,
PCBEG TYPE STRING,
PCEND TYPE STRING,
AWART TYPE STRING,
ABETP TYPE STRING,
PSARB TYPE STRING,
PARTD TYPE STRING,
DYNNR TYPE STRING,
OBEGDA TYPE STRING,
OENDDA TYPE STRING,
NBEGDA TYPE STRING,
NENDDA TYPE STRING,
AWART2 TYPE STRING,
ABETP2 TYPE STRING,
PSARB2 TYPE STRING,
DYNNR2 TYPE STRING,
PARTD2 TYPE STRING,
CKBEG TYPE STRING,
CKEND TYPE STRING,
OPERAT TYPE STRING,
CHKRSN TYPE STRING,
RSNTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P23ABS_LIST_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_P23ABS_LIST_STR-PERNR sy-vline 
WA_P23ABS_LIST_STR-PCBEG sy-vline 
WA_P23ABS_LIST_STR-PCEND sy-vline 
WA_P23ABS_LIST_STR-AWART sy-vline 
WA_P23ABS_LIST_STR-ABETP sy-vline 
WA_P23ABS_LIST_STR-PSARB sy-vline 
WA_P23ABS_LIST_STR-PARTD sy-vline 
WA_P23ABS_LIST_STR-DYNNR sy-vline 
WA_P23ABS_LIST_STR-OBEGDA sy-vline 
WA_P23ABS_LIST_STR-OENDDA sy-vline 
WA_P23ABS_LIST_STR-NBEGDA sy-vline 
WA_P23ABS_LIST_STR-NENDDA sy-vline 
WA_P23ABS_LIST_STR-AWART2 sy-vline 
WA_P23ABS_LIST_STR-ABETP2 sy-vline 
WA_P23ABS_LIST_STR-PSARB2 sy-vline 
WA_P23ABS_LIST_STR-DYNNR2 sy-vline 
WA_P23ABS_LIST_STR-PARTD2 sy-vline 
WA_P23ABS_LIST_STR-CKBEG sy-vline 
WA_P23ABS_LIST_STR-CKEND sy-vline 
WA_P23ABS_LIST_STR-OPERAT sy-vline 
WA_P23ABS_LIST_STR-CHKRSN sy-vline 
WA_P23ABS_LIST_STR-RSNTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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