: For SPARQL Join Queries with OPTIONAL Patterns (Left-outer-joins).
Medha AtrePublished in: SIGMOD Conference (2015)
Keyphrases
- join queries
- query optimization
- conjunctive queries
- query processing
- join algorithms
- parallel processing
- spatial databases
- query language
- join processing
- database systems
- efficient processing
- query execution
- complex queries
- cost model
- r tree
- query plan
- query evaluation
- join operations
- query optimizer
- spatial join
- database management systems
- multi dimensional
- integrity constraints
- frequent patterns
- continuous queries