ABAP Select data from SAP table FINS_CFIN_S_AV_PO_EX_HEADER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FINS_CFIN_S_AV_PO_EX_HEADER
*  INTO TABLE @DATA(IT_FINS_CFIN_S_AV_PO_EX_HEADER2).
*--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_FINS_CFIN_S_AV_PO_EX_HEADER INDEX 1 INTO DATA(WA_FINS_CFIN_S_AV_PO_EX_HEADER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FINS_CFIN_S_AV_PO_EX_HEADER>-SOURCESYSTEMLOGICALSYSTEM = 1.
<FINS_CFIN_S_AV_PO_EX_HEADER>-CFINRPLDPURCHASINGDOCUMENT = 1.
<FINS_CFIN_S_AV_PO_EX_HEADER>-COMPANYCODE = 1.
<FINS_CFIN_S_AV_PO_EX_HEADER>-PURCHASINGDOCUMENTCATEGORY = 1.
<FINS_CFIN_S_AV_PO_EX_HEADER>-PURCHASINGDOCUMENTTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FINS_CFIN_S_AV_PO_EX_HEADER-PURCHASINGDOCUMENTDELETIONCODE, sy-vline,
  WA_FINS_CFIN_S_AV_PO_EX_HEADER-CREATIONDATE, sy-vline,
  WA_FINS_CFIN_S_AV_PO_EX_HEADER-SUPPLIER, sy-vline,
  WA_FINS_CFIN_S_AV_PO_EX_HEADER-PURCHASINGGROUP, sy-vline,
  WA_FINS_CFIN_S_AV_PO_EX_HEADER-DOCUMENTCURRENCY, sy-vline,
  WA_FINS_CFIN_S_AV_PO_EX_HEADER-PURCHASINGDOCUMENTORDERDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FINS_CFIN_S_AV_PO_EX_HEADER 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_FINS_CFIN_S_AV_PO_EX_HEADER 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_FINS_CFIN_S_AV_PO_EX_HEADER INTO WA_FINS_CFIN_S_AV_PO_EX_HEADER.


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

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

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

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

*Conversion exit ALPHA, internal->external for field INVOICINGPARTY
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FINS_CFIN_S_AV_PO_EX_HEADER-INVOICINGPARTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FINS_CFIN_S_AV_PO_EX_HEADER-INVOICINGPARTY.
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_FINS_CFIN_S_AV_PO_EX_HEADER_STR, 
SOURCESYSTEMLOGICALSYSTEM TYPE STRING,
CFINRPLDPURCHASINGDOCUMENT TYPE STRING,
COMPANYCODE TYPE STRING,
PURCHASINGDOCUMENTCATEGORY TYPE STRING,
PURCHASINGDOCUMENTTYPE TYPE STRING,
PURCHASINGDOCUMENTDELETIONCODE TYPE STRING,
CREATIONDATE TYPE STRING,
SUPPLIER TYPE STRING,
PURCHASINGGROUP TYPE STRING,
DOCUMENTCURRENCY TYPE STRING,
PURCHASINGDOCUMENTORDERDATE TYPE STRING,
VALIDITYSTARTDATE TYPE STRING,
VALIDITYENDDATE TYPE STRING,
SUPPLYINGSUPPLIER TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
INVOICINGPARTY TYPE STRING,
TAXRETURNCOUNTRY TYPE STRING,
CREATEDBYUSER TYPE STRING,
PURCHASINGORGANIZATION TYPE STRING,
ISDELETED TYPE STRING,
LASTCHANGEDATETIME TYPE STRING,
DUMMY_AVPO_INCL_EEW_PS TYPE STRING,
ISDELTA TYPE STRING,
IUUC_OPERAT_FLAG TYPE STRING,
IUUC_TIMESTAMP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FINS_CFIN_S_AV_PO_EX_HEADER_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_FINS_CFIN_S_AV_PO_EX_HEADER_STR-SOURCESYSTEMLOGICALSYSTEM sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-CFINRPLDPURCHASINGDOCUMENT sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-COMPANYCODE sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-PURCHASINGDOCUMENTCATEGORY sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-PURCHASINGDOCUMENTTYPE sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-PURCHASINGDOCUMENTDELETIONCODE sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-CREATIONDATE sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-SUPPLIER sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-PURCHASINGGROUP sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-DOCUMENTCURRENCY sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-PURCHASINGDOCUMENTORDERDATE sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-VALIDITYSTARTDATE sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-VALIDITYENDDATE sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-SUPPLYINGSUPPLIER sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-SUPPLYINGPLANT sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-INVOICINGPARTY sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-TAXRETURNCOUNTRY sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-CREATEDBYUSER sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-PURCHASINGORGANIZATION sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-ISDELETED sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-LASTCHANGEDATETIME sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-DUMMY_AVPO_INCL_EEW_PS sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-ISDELTA sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-IUUC_OPERAT_FLAG sy-vline 
WA_FINS_CFIN_S_AV_PO_EX_HEADER_STR-IUUC_TIMESTAMP sy-vline      INTO ld_text SEPARATED BY SPACE.

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