Oracle Database 10g provides tuning tools such as the SQL Access Advisor and SQL Tuning Advisor, which can be invaluable assistants to a DBA in simplifying the ongoing tasks of performance tuning. With these to
The Oracle optimizer uses two different methods to recognize when to rewrite a query in terms of one or more materialized views. The first method is based on matching the SQL text of the query with the SQL text of the materialized view definition. If the first method fails, the optimizer ...
Oracle Cloud Infrastructure - Database Service - Version N/A and laterInformation in this document applies to any platform.SymptomsIn a database that has an AFTER ALTER ON DATABASE trigger enabled, if this trigger becomes invalid and cannot be recompiled, and the database has materialized views...
1. Introduction XML processing in the Oracle XML DB is based on the XMLType datatype. This is a native datatype introduced Permission to copy without fee all or part of this material is granted provided that the copies are not made or distributed for direct commercial advantage, the VLDB ...
3.5.1Achieving a Stable Materialized View TheContinuousQueryCacheimplementation faced the same challenge: How to assemble an exact point-in-time snapshot of an underlying cachewhile receiving a stream of modification events from that same cache. The solution has several parts. First, Coherence support...
This parameter specifies whether the queries of the objects belonging to the user can be unlocked when the user is deleted. Type: SUSET Value range: Boolean on indicates the unlocking is allowed. off indicates the unlocking is not allowed. Default value: off enforce_oracle_behavior Parameter ...
The method chain will result in a materialized result once the developer makes use of a terminal operator, e.g., on the de-sugared LINQ query in the example, evenSquares.ToArray() is called to materialize the query result into an array. From now on, we will refer to this syntax as ...
In order to improve query performance, an important issue is to decide which views should be materialized. This is the last step of the compilation phase. In the runtime phase, the input is a query Q over the target ontology O, which is written in the RDF query language SPARQL, and ...
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within the in-memory unit, mapping data that maps a set of metadata values associated with the first computation to the first set of computation results; using, by the database server instance, the first set of computation results, which were materialized within the in-memory unit, to answer...