ABAP Select data from SAP table IICLULAERESERVE_COLL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IICLULAERESERVE_COLL
*  INTO TABLE @DATA(IT_IICLULAERESERVE_COLL2).
*--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_IICLULAERESERVE_COLL INDEX 1 INTO DATA(WA_IICLULAERESERVE_COLL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IICLULAERESERVE_COLL>-COMPANYCODE = 1.
<IICLULAERESERVE_COLL>-CURR = 1.
<IICLULAERESERVE_COLL>-RESTYPE = 1.
<IICLULAERESERVE_COLL>-ULAEDBRUN = 1.
<IICLULAERESERVE_COLL>-COMPCODE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IICLULAERESERVE_COLL-STATE, sy-vline,
  WA_IICLULAERESERVE_COLL-PRDGRP, sy-vline,
  WA_IICLULAERESERVE_COLL-REGOFFICE, sy-vline,
  WA_IICLULAERESERVE_COLL-LINEOFINS, sy-vline,
  WA_IICLULAERESERVE_COLL-FUNCAREA, sy-vline,
  WA_IICLULAERESERVE_COLL-REINSCAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IICLULAERESERVE_COLL 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_IICLULAERESERVE_COLL 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_IICLULAERESERVE_COLL INTO WA_IICLULAERESERVE_COLL.


*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 ACCTSUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_IICLULAERESERVE_COLL-ACCTSUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IICLULAERESERVE_COLL-ACCTSUM.
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_IICLULAERESERVE_COLL_STR, 
COMPANYCODE TYPE STRING,
CURR TYPE STRING,
RESTYPE TYPE STRING,
ULAEDBRUN TYPE STRING,
COMPCODE TYPE STRING,
STATE TYPE STRING,
PRDGRP TYPE STRING,
REGOFFICE TYPE STRING,
LINEOFINS TYPE STRING,
FUNCAREA TYPE STRING,
REINSCAT TYPE STRING,
COVERAGE TYPE STRING,
ACCTSUM TYPE STRING,
ACCYEAR TYPE STRING,
NETRES TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IICLULAERESERVE_COLL_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_IICLULAERESERVE_COLL_STR-COMPANYCODE sy-vline 
WA_IICLULAERESERVE_COLL_STR-CURR sy-vline 
WA_IICLULAERESERVE_COLL_STR-RESTYPE sy-vline 
WA_IICLULAERESERVE_COLL_STR-ULAEDBRUN sy-vline 
WA_IICLULAERESERVE_COLL_STR-COMPCODE sy-vline 
WA_IICLULAERESERVE_COLL_STR-STATE sy-vline 
WA_IICLULAERESERVE_COLL_STR-PRDGRP sy-vline 
WA_IICLULAERESERVE_COLL_STR-REGOFFICE sy-vline 
WA_IICLULAERESERVE_COLL_STR-LINEOFINS sy-vline 
WA_IICLULAERESERVE_COLL_STR-FUNCAREA sy-vline 
WA_IICLULAERESERVE_COLL_STR-REINSCAT sy-vline 
WA_IICLULAERESERVE_COLL_STR-COVERAGE sy-vline 
WA_IICLULAERESERVE_COLL_STR-ACCTSUM sy-vline 
WA_IICLULAERESERVE_COLL_STR-ACCYEAR sy-vline 
WA_IICLULAERESERVE_COLL_STR-NETRES sy-vline      INTO ld_text SEPARATED BY SPACE.

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