ABAP Select data from SAP table FIN_CORR_ISSUE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FIN_CORR_ISSUE
*  INTO TABLE @DATA(IT_FIN_CORR_ISSUE2).
*--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_FIN_CORR_ISSUE INDEX 1 INTO DATA(WA_FIN_CORR_ISSUE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FIN_CORR_ISSUE>-MANDT = 1.
<FIN_CORR_ISSUE>-RUN_ID = 1.
<FIN_CORR_ISSUE>-BUKRS = 1.
<FIN_CORR_ISSUE>-BELNR = 1.
<FIN_CORR_ISSUE>-GJAHR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FIN_CORR_ISSUE-BUZEI, sy-vline,
  WA_FIN_CORR_ISSUE-DOCNR, sy-vline,
  WA_FIN_CORR_ISSUE-RLDNR, sy-vline,
  WA_FIN_CORR_ISSUE-DOCLN, sy-vline,
  WA_FIN_CORR_ISSUE-HKONT, sy-vline,
  WA_FIN_CORR_ISSUE-MSGID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FIN_CORR_ISSUE 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_FIN_CORR_ISSUE 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_FIN_CORR_ISSUE INTO WA_FIN_CORR_ISSUE.


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

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

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

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

*Conversion exit ALPHA, internal->external for field HKONT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FIN_CORR_ISSUE-HKONT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FIN_CORR_ISSUE-HKONT.
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_FIN_CORR_ISSUE_STR, 
MANDT TYPE STRING,
RUN_ID TYPE STRING,
BUKRS TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
DOCNR TYPE STRING,
RLDNR TYPE STRING,
DOCLN TYPE STRING,
HKONT TYPE STRING,
MSGID TYPE STRING,
MSGNO TYPE STRING,
MSGTY TYPE STRING,
MSGV1 TYPE STRING,
MSGV2 TYPE STRING,
MSGV3 TYPE STRING,
MSGV4 TYPE STRING,
FIELD1 TYPE STRING,
VALUE1 TYPE STRING,
FIELD2 TYPE STRING,
VALUE2 TYPE STRING,
FIELD3 TYPE STRING,
VALUE3 TYPE STRING,
FIELD4 TYPE STRING,
VALUE4 TYPE STRING,
FIELD5 TYPE STRING,
VALUE5 TYPE STRING,
CORRECTED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FIN_CORR_ISSUE_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_FIN_CORR_ISSUE_STR-MANDT sy-vline 
WA_FIN_CORR_ISSUE_STR-RUN_ID sy-vline 
WA_FIN_CORR_ISSUE_STR-BUKRS sy-vline 
WA_FIN_CORR_ISSUE_STR-BELNR sy-vline 
WA_FIN_CORR_ISSUE_STR-GJAHR sy-vline 
WA_FIN_CORR_ISSUE_STR-BUZEI sy-vline 
WA_FIN_CORR_ISSUE_STR-DOCNR sy-vline 
WA_FIN_CORR_ISSUE_STR-RLDNR sy-vline 
WA_FIN_CORR_ISSUE_STR-DOCLN sy-vline 
WA_FIN_CORR_ISSUE_STR-HKONT sy-vline 
WA_FIN_CORR_ISSUE_STR-MSGID sy-vline 
WA_FIN_CORR_ISSUE_STR-MSGNO sy-vline 
WA_FIN_CORR_ISSUE_STR-MSGTY sy-vline 
WA_FIN_CORR_ISSUE_STR-MSGV1 sy-vline 
WA_FIN_CORR_ISSUE_STR-MSGV2 sy-vline 
WA_FIN_CORR_ISSUE_STR-MSGV3 sy-vline 
WA_FIN_CORR_ISSUE_STR-MSGV4 sy-vline 
WA_FIN_CORR_ISSUE_STR-FIELD1 sy-vline 
WA_FIN_CORR_ISSUE_STR-VALUE1 sy-vline 
WA_FIN_CORR_ISSUE_STR-FIELD2 sy-vline 
WA_FIN_CORR_ISSUE_STR-VALUE2 sy-vline 
WA_FIN_CORR_ISSUE_STR-FIELD3 sy-vline 
WA_FIN_CORR_ISSUE_STR-VALUE3 sy-vline 
WA_FIN_CORR_ISSUE_STR-FIELD4 sy-vline 
WA_FIN_CORR_ISSUE_STR-VALUE4 sy-vline 
WA_FIN_CORR_ISSUE_STR-FIELD5 sy-vline 
WA_FIN_CORR_ISSUE_STR-VALUE5 sy-vline 
WA_FIN_CORR_ISSUE_STR-CORRECTED sy-vline      INTO ld_text SEPARATED BY SPACE.

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