ABAP Select data from SAP table P0657 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0657 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 P0657. 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 P0657 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_P0657 TYPE STANDARD TABLE OF P0657,
      WA_P0657 TYPE P0657,
      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: <P0657> TYPE P0657.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0657.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0657
  INTO TABLE IT_P0657.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0657
*  INTO TABLE @DATA(IT_P06572).
*--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_P0657 INDEX 1 INTO DATA(WA_P06572).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0657 ASSIGNING <P0657>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0657>-PERNR = 1.
<P0657>-INFTY = 1.
<P0657>-SUBTY = 1.
<P0657>-OBJPS = 1.
<P0657>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0657 INTO WA_P0657.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0657-ENDDA, sy-vline,
  WA_P0657-BEGDA, sy-vline,
  WA_P0657-SEQNR, sy-vline,
  WA_P0657-AEDTM, sy-vline,
  WA_P0657-UNAME, sy-vline,
  WA_P0657-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0657 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_P0657 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_P0657 INTO WA_P0657.


*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_P0657_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,
CNTN1 TYPE STRING,
CNTN2 TYPE STRING,
CNTN3 TYPE STRING,
CNTN4 TYPE STRING,
PYMN1 TYPE STRING,
PYMN2 TYPE STRING,
PYMN3 TYPE STRING,
PYMN4 TYPE STRING,
RECTY TYPE STRING,
PYMNR TYPE STRING,
LGART TYPE STRING,
OPKEN TYPE STRING,
BETRG TYPE STRING,
WAERS TYPE STRING,
ANZHL TYPE STRING,
ZEINH TYPE STRING,
INDBW TYPE STRING,
UWDAT TYPE STRING,
PAYTY TYPE STRING,
PAYID TYPE STRING,
OCRSN TYPE STRING,
BNKSA TYPE STRING,
PODST TYPE STRING,
ERLRT TYPE STRING,
STPNS TYPE STRING,
RUSER TYPE STRING,
RUSCH TYPE STRING,
RUSWP TYPE STRING,
RUSZR TYPE STRING,
KEYDT TYPE STRING,
PAYMN TYPE STRING,
CNSAT TYPE STRING,
DVIND TYPE STRING,
AMIND TYPE STRING,
PODS1 TYPE STRING,
KZAWD TYPE STRING,
RUD_DESCR TYPE STRING,
RUDCB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0657_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_P0657_STR-PERNR sy-vline 
WA_P0657_STR-INFTY sy-vline 
WA_P0657_STR-SUBTY sy-vline 
WA_P0657_STR-OBJPS sy-vline 
WA_P0657_STR-SPRPS sy-vline 
WA_P0657_STR-ENDDA sy-vline 
WA_P0657_STR-BEGDA sy-vline 
WA_P0657_STR-SEQNR sy-vline 
WA_P0657_STR-AEDTM sy-vline 
WA_P0657_STR-UNAME sy-vline 
WA_P0657_STR-HISTO sy-vline 
WA_P0657_STR-ITXEX sy-vline 
WA_P0657_STR-REFEX sy-vline 
WA_P0657_STR-ORDEX sy-vline 
WA_P0657_STR-ITBLD sy-vline 
WA_P0657_STR-PREAS sy-vline 
WA_P0657_STR-FLAG1 sy-vline 
WA_P0657_STR-FLAG2 sy-vline 
WA_P0657_STR-FLAG3 sy-vline 
WA_P0657_STR-FLAG4 sy-vline 
WA_P0657_STR-RESE1 sy-vline 
WA_P0657_STR-RESE2 sy-vline 
WA_P0657_STR-GRPVL sy-vline 
WA_P0657_STR-CNTN1 sy-vline 
WA_P0657_STR-CNTN2 sy-vline 
WA_P0657_STR-CNTN3 sy-vline 
WA_P0657_STR-CNTN4 sy-vline 
WA_P0657_STR-PYMN1 sy-vline 
WA_P0657_STR-PYMN2 sy-vline 
WA_P0657_STR-PYMN3 sy-vline 
WA_P0657_STR-PYMN4 sy-vline 
WA_P0657_STR-RECTY sy-vline 
WA_P0657_STR-PYMNR sy-vline 
WA_P0657_STR-LGART sy-vline 
WA_P0657_STR-OPKEN sy-vline 
WA_P0657_STR-BETRG sy-vline 
WA_P0657_STR-WAERS sy-vline 
WA_P0657_STR-ANZHL sy-vline 
WA_P0657_STR-ZEINH sy-vline 
WA_P0657_STR-INDBW sy-vline 
WA_P0657_STR-UWDAT sy-vline 
WA_P0657_STR-PAYTY sy-vline 
WA_P0657_STR-PAYID sy-vline 
WA_P0657_STR-OCRSN sy-vline 
WA_P0657_STR-BNKSA sy-vline 
WA_P0657_STR-PODST sy-vline 
WA_P0657_STR-ERLRT sy-vline 
WA_P0657_STR-STPNS sy-vline 
WA_P0657_STR-RUSER sy-vline 
WA_P0657_STR-RUSCH sy-vline 
WA_P0657_STR-RUSWP sy-vline 
WA_P0657_STR-RUSZR sy-vline 
WA_P0657_STR-KEYDT sy-vline 
WA_P0657_STR-PAYMN sy-vline 
WA_P0657_STR-CNSAT sy-vline 
WA_P0657_STR-DVIND sy-vline 
WA_P0657_STR-AMIND sy-vline 
WA_P0657_STR-PODS1 sy-vline 
WA_P0657_STR-KZAWD sy-vline 
WA_P0657_STR-RUD_DESCR sy-vline 
WA_P0657_STR-RUDCB sy-vline      INTO ld_text SEPARATED BY SPACE.

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