Re: [Luciddb-meroka] Status of the project [22/03/2010]

[John V. S. <js...@gm...>]

Riyadh wrote:
> Now I'll need to transform all data to an array of tuples, After reading 
> about the design of TupleData and TupleDatum, my question is :
> - in ReshapeExecStream::Execute() 
> I have a pInAccessor 
> object of type ExecStreamBufAccessor 
> I need to tranform this pInAccessor to a big array of all the tuples and 
> then send this big array to GPU so that the kernel can start working, 
> since I'll use one big array then all tuples should be contigoues,
> I need to read tuples one by one and marshall each tuple and store it in 
> the array,
> is there a function that reads and returns a tuple from the pInAcessor ?
> (to avoid problem I'll work initially on fixed size tuples and then i'll 
> generalize)

Well, ExecStreamBufAccessor is already accessing a contiguous array of 
tuples, so if you want to deal with them in their original format, you 
can just call the pInAccessor->spanWholeTuples method and then copy out 
a chunk of tuples to the GPU (then call consumeData to advance).

> - What is the main file of the second XO (FennelAggRel) ? I don't find 
> it, is it AggComputer.cpp ?

SortedAggExecStream (which does use AggComputer as a helper).

JVS