ABAP Select data from SAP table ICORRESPNCDATA into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICORRESPNCDATA
*  INTO TABLE @DATA(IT_ICORRESPNCDATA2).
*--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_ICORRESPNCDATA INDEX 1 INTO DATA(WA_ICORRESPNCDATA2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICORRESPNCDATA>-MANDT = 1.
<ICORRESPNCDATA>-CACORRESPONDENCETYPE = 1.
<ICORRESPNCDATA>-BUSINESSPARTNER = 1.
<ICORRESPNCDATA>-BHVRLINSGTSACCOUNTNUMBER = 1.
<ICORRESPNCDATA>-CORRESPONDENCEKEY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICORRESPNCDATA-CUSTOMEREVENTRECORDID, sy-vline,
  WA_ICORRESPNCDATA-CUSTOMEREVENTSTARTDATE, sy-vline,
  WA_ICORRESPNCDATA-CUSTOMEREVENTENDDATE, sy-vline,
  WA_ICORRESPNCDATA-BHVRLINSGTSPERIODCODE, sy-vline,
  WA_ICORRESPNCDATA-BHVRLINSGTSSUBACCOUNTNUMBER, sy-vline,
  WA_ICORRESPNCDATA-CAINBCORRESPNCCLEARINGRSN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICORRESPNCDATA 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_ICORRESPNCDATA 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_ICORRESPNCDATA INTO WA_ICORRESPNCDATA.


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

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

*Conversion exit ALPHA, internal->external for field BHVRLINSGTSSUBACCOUNTNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICORRESPNCDATA-BHVRLINSGTSSUBACCOUNTNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICORRESPNCDATA-BHVRLINSGTSSUBACCOUNTNUMBER.
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_ICORRESPNCDATA_STR, 
MANDT TYPE STRING,
CACORRESPONDENCETYPE TYPE STRING,
BUSINESSPARTNER TYPE STRING,
BHVRLINSGTSACCOUNTNUMBER TYPE STRING,
CORRESPONDENCEKEY TYPE STRING,
CUSTOMEREVENTRECORDID TYPE STRING,
CUSTOMEREVENTSTARTDATE TYPE STRING,
CUSTOMEREVENTENDDATE TYPE STRING,
BHVRLINSGTSPERIODCODE TYPE STRING,
BHVRLINSGTSSUBACCOUNTNUMBER TYPE STRING,
CAINBCORRESPNCCLEARINGRSN TYPE STRING,
INBOUNDCORRESPNCRECEIVEDDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICORRESPNCDATA_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_ICORRESPNCDATA_STR-MANDT sy-vline 
WA_ICORRESPNCDATA_STR-CACORRESPONDENCETYPE sy-vline 
WA_ICORRESPNCDATA_STR-BUSINESSPARTNER sy-vline 
WA_ICORRESPNCDATA_STR-BHVRLINSGTSACCOUNTNUMBER sy-vline 
WA_ICORRESPNCDATA_STR-CORRESPONDENCEKEY sy-vline 
WA_ICORRESPNCDATA_STR-CUSTOMEREVENTRECORDID sy-vline 
WA_ICORRESPNCDATA_STR-CUSTOMEREVENTSTARTDATE sy-vline 
WA_ICORRESPNCDATA_STR-CUSTOMEREVENTENDDATE sy-vline 
WA_ICORRESPNCDATA_STR-BHVRLINSGTSPERIODCODE sy-vline 
WA_ICORRESPNCDATA_STR-BHVRLINSGTSSUBACCOUNTNUMBER sy-vline 
WA_ICORRESPNCDATA_STR-CAINBCORRESPNCCLEARINGRSN sy-vline 
WA_ICORRESPNCDATA_STR-INBOUNDCORRESPNCRECEIVEDDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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