Re: [droolers] Rete

[bob mcwhirter]

AssignmentNodes are *sometimes* the column-generator nodes.

        name = person.getName()

That takes a table with only a 'person' column, and it generates a
matching 'name' column, populated with the name of the person.

AssignmentNodes are *sometimes* the join-nodes.

        name = otherName

Here, the 'name' column from the person/name table is joined to the
'otherName' column of some other table.

Drools-2 does *not* include ConstantTest nodes at the moment.  I don't
think I'm doing enough anlysis to determine when the RHS is a constant.
But, it's a theoretically possibile optimization.

        -bob

        

On Mon, 27 May 2002, Maheedhar (STP) wrote:

> Hi evrey body,
>       Assignment nodes of drools extract fact and add the fact to Incoming
> Rete Tuples. Does that mean Assignment nodes correspond to the Column
> Generators Nodes of Rete-OO algorithm. 
>       Please let me know what do Column generator nodes and Constant test
> nodes of Rete-OO correspond to in the drools implementation..
> 
> Thank You,
> 
> Maheedhar Vishwanathula
> 
> 
> 
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