ABAP Select data from SAP table P2EG_SI into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2EG_SI 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 P2EG_SI. 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 P2EG_SI 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_P2EG_SI TYPE STANDARD TABLE OF P2EG_SI,
      WA_P2EG_SI TYPE P2EG_SI,
      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: <P2EG_SI> TYPE P2EG_SI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2EG_SI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2EG_SI
  INTO TABLE IT_P2EG_SI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2EG_SI
*  INTO TABLE @DATA(IT_P2EG_SI2).
*--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_P2EG_SI INDEX 1 INTO DATA(WA_P2EG_SI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2EG_SI ASSIGNING <P2EG_SI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2EG_SI>-MANDT = 1.
<P2EG_SI>-DCT_PERNR = 1.
<P2EG_SI>-DCT_SEQNR = 1.
<P2EG_SI>-DCT_ROWID = 1.
<P2EG_SI>-CNTR1 = 1.

ENDLOOP.

LOOP AT IT_P2EG_SI INTO WA_P2EG_SI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2EG_SI-BEGDA, sy-vline,
  WA_P2EG_SI-ENDDA, sy-vline,
  WA_P2EG_SI-SIEXC, sy-vline,
  WA_P2EG_SI-SIFTY, sy-vline,
  WA_P2EG_SI-SINUM, sy-vline,
  WA_P2EG_SI-SIEDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2EG_SI 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_P2EG_SI 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_P2EG_SI INTO WA_P2EG_SI.


*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_P2EG_SI_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
CNTR1 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SIEXC TYPE STRING,
SIFTY TYPE STRING,
SINUM TYPE STRING,
SIEDT TYPE STRING,
FULLC TYPE STRING,
ESFUN TYPE STRING,
REAGE TYPE STRING,
RAMAL TYPE STRING,
RAFEM TYPE STRING,
HPERD TYPE STRING,
TPERD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2EG_SI_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_P2EG_SI_STR-MANDT sy-vline 
WA_P2EG_SI_STR-DCT_PERNR sy-vline 
WA_P2EG_SI_STR-DCT_SEQNR sy-vline 
WA_P2EG_SI_STR-DCT_ROWID sy-vline 
WA_P2EG_SI_STR-CNTR1 sy-vline 
WA_P2EG_SI_STR-BEGDA sy-vline 
WA_P2EG_SI_STR-ENDDA sy-vline 
WA_P2EG_SI_STR-SIEXC sy-vline 
WA_P2EG_SI_STR-SIFTY sy-vline 
WA_P2EG_SI_STR-SINUM sy-vline 
WA_P2EG_SI_STR-SIEDT sy-vline 
WA_P2EG_SI_STR-FULLC sy-vline 
WA_P2EG_SI_STR-ESFUN sy-vline 
WA_P2EG_SI_STR-REAGE sy-vline 
WA_P2EG_SI_STR-RAMAL sy-vline 
WA_P2EG_SI_STR-RAFEM sy-vline 
WA_P2EG_SI_STR-HPERD sy-vline 
WA_P2EG_SI_STR-TPERD sy-vline      INTO ld_text SEPARATED BY SPACE.

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