11. Virtuoso Cluster Programming
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Contents
Preface
Virtuoso Cluster Programming
Cluster SQL Execution Model
Sequences, Identity and Registry
SQL Options
Calling Procedures in Cluster
Partition Functions
Distributed Pipe
Cluster and RDF
Cluster, Virtual Database and Replication
Limitations of Alpha 6.0
Troubleshooting
11.9. Limitations of Alpha 6.0
DDL
Once a logical cluster is created, it cannot be modified.
Once a table or index has data, its partitioning cannot be changed.
SQL
Value subqueries, derived tables and subquery predicates are executed one at a time. In some cases this can have a performance penalty.
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Cluster, Virtual Database and Replication
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Troubleshooting
