ABAP Select data from SAP table P2CO_COGAR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2CO_COGAR 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 P2CO_COGAR. 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 P2CO_COGAR 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_P2CO_COGAR TYPE STANDARD TABLE OF P2CO_COGAR,
      WA_P2CO_COGAR TYPE P2CO_COGAR,
      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: <P2CO_COGAR> TYPE P2CO_COGAR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2CO_COGAR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2CO_COGAR
  INTO TABLE IT_P2CO_COGAR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2CO_COGAR
*  INTO TABLE @DATA(IT_P2CO_COGAR2).
*--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_P2CO_COGAR INDEX 1 INTO DATA(WA_P2CO_COGAR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2CO_COGAR ASSIGNING <P2CO_COGAR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2CO_COGAR>-MANDT = 1.
<P2CO_COGAR>-DCT_PERNR = 1.
<P2CO_COGAR>-DCT_SEQNR = 1.
<P2CO_COGAR>-DCT_ROWID = 1.
<P2CO_COGAR>-CNTR1 = 1.

ENDLOOP.

LOOP AT IT_P2CO_COGAR INTO WA_P2CO_COGAR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2CO_COGAR-GCATE, sy-vline,
  WA_P2CO_COGAR-GRNUM, sy-vline,
  WA_P2CO_COGAR-INPER, sy-vline,
  WA_P2CO_COGAR-LGART, sy-vline,
  WA_P2CO_COGAR-GPRIO, sy-vline,
  WA_P2CO_COGAR-QUOVA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2CO_COGAR 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_P2CO_COGAR 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_P2CO_COGAR INTO WA_P2CO_COGAR.


*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.

*Conversion exit ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_P2CO_COGAR-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P2CO_COGAR-LIFNR.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_P2CO_COGAR_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
CNTR1 TYPE STRING,
GCATE TYPE STRING,
GRNUM TYPE STRING,
INPER TYPE STRING,
LGART TYPE STRING,
GPRIO TYPE STRING,
QUOVA TYPE STRING,
DISVA TYPE STRING,
GARBA TYPE STRING,
WAERS TYPE STRING,
LIFNR TYPE STRING,
CNTR3 TYPE STRING,
DIFRE TYPE STRING,
FPPER TYPE STRING,
EBASE TYPE STRING,
FPAGO TYPE STRING,
PPAGO TYPE STRING,
MPAGO TYPE STRING,
ARPLA TYPE STRING,
TRESU TYPE STRING,
FLIQU TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2CO_COGAR_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_P2CO_COGAR_STR-MANDT sy-vline 
WA_P2CO_COGAR_STR-DCT_PERNR sy-vline 
WA_P2CO_COGAR_STR-DCT_SEQNR sy-vline 
WA_P2CO_COGAR_STR-DCT_ROWID sy-vline 
WA_P2CO_COGAR_STR-CNTR1 sy-vline 
WA_P2CO_COGAR_STR-GCATE sy-vline 
WA_P2CO_COGAR_STR-GRNUM sy-vline 
WA_P2CO_COGAR_STR-INPER sy-vline 
WA_P2CO_COGAR_STR-LGART sy-vline 
WA_P2CO_COGAR_STR-GPRIO sy-vline 
WA_P2CO_COGAR_STR-QUOVA sy-vline 
WA_P2CO_COGAR_STR-DISVA sy-vline 
WA_P2CO_COGAR_STR-GARBA sy-vline 
WA_P2CO_COGAR_STR-WAERS sy-vline 
WA_P2CO_COGAR_STR-LIFNR sy-vline 
WA_P2CO_COGAR_STR-CNTR3 sy-vline 
WA_P2CO_COGAR_STR-DIFRE sy-vline 
WA_P2CO_COGAR_STR-FPPER sy-vline 
WA_P2CO_COGAR_STR-EBASE sy-vline 
WA_P2CO_COGAR_STR-FPAGO sy-vline 
WA_P2CO_COGAR_STR-PPAGO sy-vline 
WA_P2CO_COGAR_STR-MPAGO sy-vline 
WA_P2CO_COGAR_STR-ARPLA sy-vline 
WA_P2CO_COGAR_STR-TRESU sy-vline 
WA_P2CO_COGAR_STR-FLIQU sy-vline      INTO ld_text SEPARATED BY SPACE.

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