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From "Kathey Marsden (JIRA)" <derby-...@db.apache.org>
Subject [jira] Assigned: (DERBY-739) Reduce generated code required to access a parameter's value
Date Thu, 01 Dec 2005 20:53:32 GMT
     [ http://issues.apache.org/jira/browse/DERBY-739?page=all ]

Kathey Marsden reassigned DERBY-739:
------------------------------------

    Assign To: Kathey Marsden

> Reduce generated code required to access a parameter's value
> ------------------------------------------------------------
>
>          Key: DERBY-739
>          URL: http://issues.apache.org/jira/browse/DERBY-739
>      Project: Derby
>         Type: Sub-task
>     Reporter: Daniel John Debrunner
>     Assignee: Kathey Marsden
>     Priority: Minor

>
> When accessing a parameter the generated code is:
> this.pvs.getParameter(23);
> A slightly shorter form would be
> this.getParameter(23);
> if a getParameter() method was added to BaseActivation that simply did:
>  protected final DataValueDescriptor getParameter(int n) { return pvs.getParameter(n);
}
> ------------------------------
> An interesting separate idea, to reduce the number of constant pool entries would be
to have multiple getParameter() methods, that took values from 0-5 to construct the actual
parameter number.
> getParameter(3) -- >  3 parameter (0 based)
> getParameter(2, 1) --> 13 parameter (2*6 + 1)
> getParameter(5, 1, 4) --> 190 parameter (5*36 + 1*6+ 4)
> above the limit of three args, revert to getParameter(n)
> This should probably be a separate issue and probably would increease code size which
would not help DERBY-732 , it's a tradeoff between constant pool entries and code size.

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