ABAP Select data from SAP table FDM_COLL_P2P_OVERVIEW_ALV into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FDM_COLL_P2P_OVERVIEW_ALV 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 FDM_COLL_P2P_OVERVIEW_ALV. 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 FDM_COLL_P2P_OVERVIEW_ALV 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_FDM_COLL_P2P_OVERVIEW_ALV TYPE STANDARD TABLE OF FDM_COLL_P2P_OVERVIEW_ALV,
      WA_FDM_COLL_P2P_OVERVIEW_ALV TYPE FDM_COLL_P2P_OVERVIEW_ALV,
      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: <FDM_COLL_P2P_OVERVIEW_ALV> TYPE FDM_COLL_P2P_OVERVIEW_ALV.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FDM_COLL_P2P_OVERVIEW_ALV.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FDM_COLL_P2P_OVERVIEW_ALV
  INTO TABLE IT_FDM_COLL_P2P_OVERVIEW_ALV.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FDM_COLL_P2P_OVERVIEW_ALV
*  INTO TABLE @DATA(IT_FDM_COLL_P2P_OVERVIEW_ALV2).
*--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_FDM_COLL_P2P_OVERVIEW_ALV INDEX 1 INTO DATA(WA_FDM_COLL_P2P_OVERVIEW_ALV2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FDM_COLL_P2P_OVERVIEW_ALV ASSIGNING <FDM_COLL_P2P_OVERVIEW_ALV>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FDM_COLL_P2P_OVERVIEW_ALV>-RELICON = 1.
<FDM_COLL_P2P_OVERVIEW_ALV>-CUSTOMER = 1.
<FDM_COLL_P2P_OVERVIEW_ALV>-CASE_GUID = 1.
<FDM_COLL_P2P_OVERVIEW_ALV>-EXT_KEY = 1.
<FDM_COLL_P2P_OVERVIEW_ALV>-COMP_CODE = 1.

ENDLOOP.

LOOP AT IT_FDM_COLL_P2P_OVERVIEW_ALV INTO WA_FDM_COLL_P2P_OVERVIEW_ALV.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FDM_COLL_P2P_OVERVIEW_ALV-INVOICE_NO, sy-vline,
  WA_FDM_COLL_P2P_OVERVIEW_ALV-DOC_ITEM, sy-vline,
  WA_FDM_COLL_P2P_OVERVIEW_ALV-FISCAL_YEAR, sy-vline,
  WA_FDM_COLL_P2P_OVERVIEW_ALV-BILLING_DOC, sy-vline,
  WA_FDM_COLL_P2P_OVERVIEW_ALV-P2P_CURR, sy-vline,
  WA_FDM_COLL_P2P_OVERVIEW_ALV-PROMISED_AMT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FDM_COLL_P2P_OVERVIEW_ALV 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_FDM_COLL_P2P_OVERVIEW_ALV 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_FDM_COLL_P2P_OVERVIEW_ALV INTO WA_FDM_COLL_P2P_OVERVIEW_ALV.


*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 CUSTOMER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM_COLL_P2P_OVERVIEW_ALV-CUSTOMER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_COLL_P2P_OVERVIEW_ALV-CUSTOMER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXT_KEY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM_COLL_P2P_OVERVIEW_ALV-EXT_KEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_COLL_P2P_OVERVIEW_ALV-EXT_KEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field INVOICE_NO
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM_COLL_P2P_OVERVIEW_ALV-INVOICE_NO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_COLL_P2P_OVERVIEW_ALV-INVOICE_NO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field FISCAL_YEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FDM_COLL_P2P_OVERVIEW_ALV-FISCAL_YEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_COLL_P2P_OVERVIEW_ALV-FISCAL_YEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BILLING_DOC
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM_COLL_P2P_OVERVIEW_ALV-BILLING_DOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_COLL_P2P_OVERVIEW_ALV-BILLING_DOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SAKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDM_COLL_P2P_OVERVIEW_ALV-SAKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDM_COLL_P2P_OVERVIEW_ALV-SAKNR.
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_FDM_COLL_P2P_OVERVIEW_ALV_STR, 
RELICON TYPE STRING,
CUSTOMER TYPE STRING,
CASE_GUID TYPE STRING,
EXT_KEY TYPE STRING,
COMP_CODE TYPE STRING,
INVOICE_NO TYPE STRING,
DOC_ITEM TYPE STRING,
FISCAL_YEAR TYPE STRING,
BILLING_DOC TYPE STRING,
P2P_CURR TYPE STRING,
PROMISED_AMT TYPE STRING,
PROMISED_BY TYPE STRING,
CONTACT_MAIL TYPE STRING,
CONTACT_TEL TYPE STRING,
CONTACT_FAX TYPE STRING,
CONTACT_FAXC TYPE STRING,
P2P_DUE_DATE TYPE STRING,
PAID_AMOUNT TYPE STRING,
LAST_PAYMENT TYPE STRING,
P2P_DATE TYPE STRING,
P2P_STATE TYPE STRING,
P2P_LEVEL TYPE STRING,
P2P_REF TYPE STRING,
INST_PLAN_TYPE TYPE STRING,
NO_OF_INST TYPE STRING,
PAID_OS TYPE STRING,
PAID_NOT_OS TYPE STRING,
INST_IS_OVERDUE TYPE STRING,
XBLNR TYPE STRING,
SAKNR TYPE STRING,
MONAT TYPE STRING,
P2P_STATE_TXT TYPE STRING,
INST_PLAN_TYPE_TEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FDM_COLL_P2P_OVERVIEW_ALV_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_FDM_COLL_P2P_OVERVIEW_ALV_STR-RELICON sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-CUSTOMER sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-CASE_GUID sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-EXT_KEY sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-COMP_CODE sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-INVOICE_NO sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-DOC_ITEM sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-FISCAL_YEAR sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-BILLING_DOC sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-P2P_CURR sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-PROMISED_AMT sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-PROMISED_BY sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-CONTACT_MAIL sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-CONTACT_TEL sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-CONTACT_FAX sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-CONTACT_FAXC sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-P2P_DUE_DATE sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-PAID_AMOUNT sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-LAST_PAYMENT sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-P2P_DATE sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-P2P_STATE sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-P2P_LEVEL sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-P2P_REF sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-INST_PLAN_TYPE sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-NO_OF_INST sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-PAID_OS sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-PAID_NOT_OS sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-INST_IS_OVERDUE sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-XBLNR sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-SAKNR sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-MONAT sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-P2P_STATE_TXT sy-vline 
WA_FDM_COLL_P2P_OVERVIEW_ALV_STR-INST_PLAN_TYPE_TEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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