Smalltalk-80: the language and its implementation
Smalltalk-80: the language and its implementation
The ObjectStore database system
Communications of the ACM
Object identity as a query language primitive
Journal of the ACM (JACM)
Database description with SDM: a semantic database model
ACM Transactions on Database Systems (TODS)
Adaptive set intersections, unions, and differences
SODA '00 Proceedings of the eleventh annual ACM-SIAM symposium on Discrete algorithms
Inefficiency of the use of Boolean functions for information retrieval systems
Communications of the ACM
Modern Information Retrieval
Sesame: A Generic Architecture for Storing and Querying RDF and RDF Schema
ISWC '02 Proceedings of the First International Semantic Web Conference on The Semantic Web
An efficient SQL-based RDF querying scheme
VLDB '05 Proceedings of the 31st international conference on Very large data bases
Bigtable: a distributed storage system for structured data
OSDI '06 Proceedings of the 7th USENIX Symposium on Operating Systems Design and Implementation - Volume 7
Scalable semantic web data management using vertical partitioning
VLDB '07 Proceedings of the 33rd international conference on Very large data bases
The end of an architectural era: (it's time for a complete rewrite)
VLDB '07 Proceedings of the 33rd international conference on Very large data bases
Freebase: a collaboratively created graph database for structuring human knowledge
Proceedings of the 2008 ACM SIGMOD international conference on Management of data
Hexastore: sextuple indexing for semantic web data management
Proceedings of the VLDB Endowment
SW-Store: a vertically partitioned DBMS for Semantic Web data management
The VLDB Journal — The International Journal on Very Large Data Bases
A learning support tool with clinical cases based on concept maps and medical entity recognition
Proceedings of the 2012 ACM international conference on Intelligent User Interfaces
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Current relational databases require that a database schema exist prior to data entry and require manual optimization for best performance. We describe the query optimization techniques used by graphd, the schema-last, automatically indexed tuple-store which supports freebase.com, a large world-writable database. Graphd is a log-structured store with a query optimizer based on a functional operator tree over the domain of sorted integer sets which accumulate naturally as tuples are appended to the store. We demonstrate that a set-based optimizer can deliver performance that is roughly comparable to traditional RDBMS query optimization techniques applied to a fixed schema.