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