Re: [HACKERS] Common Table Expressions (WITH RECURSIVE) patch

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Hi,

Le 30 sept. 08 à 20:03, Tom Lane a écrit :
> set_read_position(tupstore, &local_read_position);
> tuple = tuplestore_gettuple(tupstore, ...);
> get_read_position(tupstore, &local_read_position);
>
> rather than just tuplestore_gettuple. The set/get functions will be
> cheap enough that this is no big deal. (Or maybe we should just
> provide a wrapper function that does this sequence?)

It seems to me to share some ideas with the MemoryContext concept:
what about a TupstoreContext associated with tuplestore, you get a
common default one if you don't register your own, and use
tuplestore_gettuple(MyTupstoreContext, ...);

Maybe some other API would benefit from the idea?

Regards,
- --
dim

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