Keyphrases
- query processing
- database systems
- r tree
- datalog programs
- query optimization
- graph theory
- aggregate queries
- graph theoretic
- graph representation
- cost model
- structured data
- index structure
- random walk
- directed graph
- connected components
- social networks
- graph structure
- first order logic
- link analysis
- directed acyclic graph
- join algorithms
- similarity search
- graph structures
- multidatabase environment