Query optimization with deferred updates and autonomous sources
First Claim
1. A method of executing an object-oriented query to retrieve data from a database stored on a data storage device connected to a computer, the method comprising the steps of:
- transforming the object-oriented query into subqueries, wherein at least one subquery is directed against a database, and wherein one subquery is directed against an object cache;
executing each subquery that is directed against a database to retrieve data from the database into the object cache; and
executing the subquery that is directed against the object cache to retrieve data for the query, wherein the data incorporates updates to the object cache and updates to the database.
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Abstract
A method, apparatus, and article of manufacture for a computer-implemented technique for query optimization with deferred updates and autonomous sources. An object-oriented query is executed to retrieve data from a database. The database is stored on a data storage device connected to a computer. The object-oriented query is transformed into subqueries, wherein at least one subquery is directed against a database, and wherein one subquery is directed against an object cache. Each subquery that is directed against a database is executed to retrieve data from the database into the object cache. The subquery that is directed against the object cache is executed to retrieve data for the query, wherein the data incorporates updates to the object cache and updates to the database.
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Citations
36 Claims
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1. A method of executing an object-oriented query to retrieve data from a database stored on a data storage device connected to a computer, the method comprising the steps of:
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transforming the object-oriented query into subqueries, wherein at least one subquery is directed against a database, and wherein one subquery is directed against an object cache;
executing each subquery that is directed against a database to retrieve data from the database into the object cache; and
executing the subquery that is directed against the object cache to retrieve data for the query, wherein the data incorporates updates to the object cache and updates to the database. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. An apparatus for executing an object-oriented query, comprising:
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a computer having a data storage device connected thereto, wherein the data storage device stores a database;
one or more computer programs, performed by the computer, for transforming the object-oriented query into subqueries, wherein at least one subquery is directed against a database, and wherein one subquery is directed against an object cache;
executing each subquery that is directed against a database to retrieve data from the database into the object cache, and executing the subquery that is directed against the object cache to retrieve data for the query, wherein the data incorporates updates to the object cache and updates to the database.- View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. An article of manufacture comprising a computer program carrier readable by a computer and embodying one or more instructions executable by the computer to perform method steps for executing an object-oriented query to retrieve data from a database stored on a data storage device connected to the computer, the method comprising the steps of:
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transforming the object-oriented query into subqueries, wherein at least one subquery is directed against a database, and wherein one subquery is directed against an object cache;
executing each subquery that is directed against a database to retrieve data from the database into the object cache; and
executing the subquery that is directed against the object cache to retrieve data for the query, wherein the data incorporates updates to the object cache and updates to the database. - View Dependent Claims (26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
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Specification