How execute a dynamic statement with a variable number of bind variables

Hi all.
I would like to execute SQL statements in a PL/SQL function.
SQL statements must use bind variable in order to avoid parsing time. But the number of arguments depends on the context. I can have from 10 to several hundreds of arguments (these arguments are used in a 'IN' clause).
To minimise the number of differents signature (each new signature involve a parsing), the number of argument is rounded.
My problem is : how to set dynamicaly the bind variables ?
Cause it is pretty simple to construct dynamicaly the SQL statement, but using an
" OPEN .... USING var1, var2, ..., varX "
statement, it is not possible to handle a variable nomber of bind variable.
I am looking for the best way to do the same thing that it can be done in java/JDBC with the PreparedStatement.setObject(int parameterIndex, Object x).
I saw the dbms_sql package and bond_variable procedure : is a the good way to do such a thing ?
Thanks

If the variation is only values in an IN list, I would suggest using an object type for the bind variable. This lets you have just one bind variable, regardless of how many values are in the IN list.
The dynamic SQL ends up looking like:
' ... where c in (select * from table(:mylist))' using v_list;where v_list is a collection based on a SQL user-defined type that can be populated incrementally, or in one shot from a delimited list of values using a helper function.
I use this approach all the time in dynamic searches.
See this link for more details:
http://asktom.oracle.com/pls/ask/f?p=4950:8:::::F4950_P8_DISPLAYID:110612348061

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flyeminent wrote:
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[Thid thread|http://forums.oracle.com/forums/thread.jspa?messageID=2744039&#2744039] shows how to pivot a table with a dynamic number of columns.

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