what about queries that need to do joins or aggregate reporting across the partitions?!? I can't see how that could be done transparently short of something like Oracle RAC.
GridSQL actually does a nice job of breaking up the query and optimizing it appropriately to handle cross node joins. There are agents running on each of the nodes that handles the inter-node communication allowing it to be transparent to the calling application.
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Jim Mlodgenski
EnterpriseDB (
http://www.enterprisedb.com)