ABAP Select data from SAP table P0656 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0656 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 P0656. 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 P0656 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_P0656 TYPE STANDARD TABLE OF P0656,
      WA_P0656 TYPE P0656,
      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: <P0656> TYPE P0656.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0656.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0656
  INTO TABLE IT_P0656.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0656
*  INTO TABLE @DATA(IT_P06562).
*--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_P0656 INDEX 1 INTO DATA(WA_P06562).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0656 ASSIGNING <P0656>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0656>-PERNR = 1.
<P0656>-INFTY = 1.
<P0656>-SUBTY = 1.
<P0656>-OBJPS = 1.
<P0656>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0656 INTO WA_P0656.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0656-ENDDA, sy-vline,
  WA_P0656-BEGDA, sy-vline,
  WA_P0656-SEQNR, sy-vline,
  WA_P0656-AEDTM, sy-vline,
  WA_P0656-UNAME, sy-vline,
  WA_P0656-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0656 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_P0656 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_P0656 INTO WA_P0656.


*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_P0656_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,
ACTION TYPE STRING,
LEGAL_AUTH TYPE STRING,
SEQNO TYPE STRING,
REASON TYPE STRING,
REMARK01 TYPE STRING,
REMARK02 TYPE STRING,
REMARK03 TYPE STRING,
REMARK04 TYPE STRING,
REMARK05 TYPE STRING,
REMARK06 TYPE STRING,
REMARK07 TYPE STRING,
NOACD TYPE STRING,
AUT01 TYPE STRING,
AUT02 TYPE STRING,
SEQ01 TYPE STRING,
SEQ02 TYPE STRING,
CPDFR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0656_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_P0656_STR-PERNR sy-vline 
WA_P0656_STR-INFTY sy-vline 
WA_P0656_STR-SUBTY sy-vline 
WA_P0656_STR-OBJPS sy-vline 
WA_P0656_STR-SPRPS sy-vline 
WA_P0656_STR-ENDDA sy-vline 
WA_P0656_STR-BEGDA sy-vline 
WA_P0656_STR-SEQNR sy-vline 
WA_P0656_STR-AEDTM sy-vline 
WA_P0656_STR-UNAME sy-vline 
WA_P0656_STR-HISTO sy-vline 
WA_P0656_STR-ITXEX sy-vline 
WA_P0656_STR-REFEX sy-vline 
WA_P0656_STR-ORDEX sy-vline 
WA_P0656_STR-ITBLD sy-vline 
WA_P0656_STR-PREAS sy-vline 
WA_P0656_STR-FLAG1 sy-vline 
WA_P0656_STR-FLAG2 sy-vline 
WA_P0656_STR-FLAG3 sy-vline 
WA_P0656_STR-FLAG4 sy-vline 
WA_P0656_STR-RESE1 sy-vline 
WA_P0656_STR-RESE2 sy-vline 
WA_P0656_STR-GRPVL sy-vline 
WA_P0656_STR-ACTION sy-vline 
WA_P0656_STR-LEGAL_AUTH sy-vline 
WA_P0656_STR-SEQNO sy-vline 
WA_P0656_STR-REASON sy-vline 
WA_P0656_STR-REMARK01 sy-vline 
WA_P0656_STR-REMARK02 sy-vline 
WA_P0656_STR-REMARK03 sy-vline 
WA_P0656_STR-REMARK04 sy-vline 
WA_P0656_STR-REMARK05 sy-vline 
WA_P0656_STR-REMARK06 sy-vline 
WA_P0656_STR-REMARK07 sy-vline 
WA_P0656_STR-NOACD sy-vline 
WA_P0656_STR-AUT01 sy-vline 
WA_P0656_STR-AUT02 sy-vline 
WA_P0656_STR-SEQ01 sy-vline 
WA_P0656_STR-SEQ02 sy-vline 
WA_P0656_STR-CPDFR sy-vline      INTO ld_text SEPARATED BY SPACE.

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