ABAP Select data from SAP table IICLRESERVE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IICLRESERVE
*  INTO TABLE @DATA(IT_IICLRESERVE2).
*--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_IICLRESERVE INDEX 1 INTO DATA(WA_IICLRESERVE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IICLRESERVE>-MANDT = 1.
<IICLRESERVE>-INSURANCECLAIM = 1.
<IICLRESERVE>-INSURCLMSUBCLM = 1.
<IICLRESERVE>-INSURCLMRSRVTYPE = 1.
<IICLRESERVE>-INSURCLMRESERVECURRENCY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IICLRESERVE-INSURCLMRSRVCHANGETIME, sy-vline,
  WA_IICLRESERVE-INSURCLMCHANGEDATE, sy-vline,
  WA_IICLRESERVE-GROSSRESERVEAMOUNT, sy-vline,
  WA_IICLRESERVE-POSTINGDATE, sy-vline,
  WA_IICLRESERVE-INSURCLMRSRVMETHODNAME, sy-vline,
  WA_IICLRESERVE-INSURCLMRSRVMETHODTEXT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IICLRESERVE 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_IICLRESERVE 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_IICLRESERVE INTO WA_IICLRESERVE.


*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 INSURANCECLAIM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IICLRESERVE-INSURANCECLAIM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IICLRESERVE-INSURANCECLAIM.
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_IICLRESERVE_STR, 
MANDT TYPE STRING,
INSURANCECLAIM TYPE STRING,
INSURCLMSUBCLM TYPE STRING,
INSURCLMRSRVTYPE TYPE STRING,
INSURCLMRESERVECURRENCY TYPE STRING,
INSURCLMRSRVCHANGETIME TYPE STRING,
INSURCLMCHANGEDATE TYPE STRING,
GROSSRESERVEAMOUNT TYPE STRING,
POSTINGDATE TYPE STRING,
INSURCLMRSRVMETHODNAME TYPE STRING,
INSURCLMRSRVMETHODTEXT TYPE STRING,
INSURCLMRSRVPENDINGAMOUNT TYPE STRING,
INSURCLMRESERVECHANGERSN TYPE STRING,
INSURCLMSUBCLAIMASSIGNUUID TYPE STRING,
INSURCLMASSIGNUUID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IICLRESERVE_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_IICLRESERVE_STR-MANDT sy-vline 
WA_IICLRESERVE_STR-INSURANCECLAIM sy-vline 
WA_IICLRESERVE_STR-INSURCLMSUBCLM sy-vline 
WA_IICLRESERVE_STR-INSURCLMRSRVTYPE sy-vline 
WA_IICLRESERVE_STR-INSURCLMRESERVECURRENCY sy-vline 
WA_IICLRESERVE_STR-INSURCLMRSRVCHANGETIME sy-vline 
WA_IICLRESERVE_STR-INSURCLMCHANGEDATE sy-vline 
WA_IICLRESERVE_STR-GROSSRESERVEAMOUNT sy-vline 
WA_IICLRESERVE_STR-POSTINGDATE sy-vline 
WA_IICLRESERVE_STR-INSURCLMRSRVMETHODNAME sy-vline 
WA_IICLRESERVE_STR-INSURCLMRSRVMETHODTEXT sy-vline 
WA_IICLRESERVE_STR-INSURCLMRSRVPENDINGAMOUNT sy-vline 
WA_IICLRESERVE_STR-INSURCLMRESERVECHANGERSN sy-vline 
WA_IICLRESERVE_STR-INSURCLMSUBCLAIMASSIGNUUID sy-vline 
WA_IICLRESERVE_STR-INSURCLMASSIGNUUID sy-vline      INTO ld_text SEPARATED BY SPACE.

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