10 citations · 21 across the 11 of their papers we have counts for
Showing 2005 · cs.DBShow all
2 papers · 2 filters
cs.DB2005
Tight Lower Bounds for Query Processing on Streaming and External Memory Data
Martin Grohe, Christoph Koch, Nicole Schweikardt
We study a clean machine model for external memory and stream processing. We show that the number of scans of the external data induces a strict hierarchy (as long as work space is…
cs.DB2005
On the Complexity of Nonrecursive XQuery and Functional Query Languages on Complex Values
Christoph Koch
This paper studies the complexity of evaluating functional query languages for complex values such as monad algebra and the recursion-free fragment of XQuery. We show that monad al…