Re: [rules-dev] Constraint efficiency: (was: "New in 5.2.0" - What works, what doesn't?)
On 9 May 2011 15:56, Mark Proctor <mproctor(a)codehaus.org> wrote:
On 09/05/2011 12:40, Wolfgang Laun wrote:
But the following does not permit indexing:
<any RHS expression from above> == <fieldname>
I don't understand this question as there is no join process in the RHS,
and thus no possible indexing.
I thought that a very simple transformation could fold this back into
<fieldname> == <any RHS expression from above>
If the "indexable" forms can be detected by checking the 1st operand and the
operator, surely the same is possible for testing the 2nd operand, followed
by swapping operands.
Example:
Person( name == "Fred" )
same as
Person( "Fred" == name )
But I don't think that this is an important feature - just wanted to make
sure what is, and what is not carried over from legacy.
Thanks
Wolfgang
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