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US 8,620,945 B2Granted
Query rewind mechanism for processing a continuous stream of data
AssigneeHewlett-Packard Development Company, L.P.
InventorsQiming Chen, Meichun Hsu
Life of this patent
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Abstract
A query engine receives a continuous stream of data and applies a Structured Query Language (SQL) query to the data. The data is processed on a chunk-by-chunk basis with a query rewind mechanism that sustains the SQL query as a single long-standing query that allows a state of the SQL query to be maintained.
Claims15
A method executed by a computing system, comprising:
- receiving, at a query engine in a database system, a continuous stream of data in data chunks;
- applying a Structured Query Language (SQL) query with User Defined Functions (UDFs) to the data chunks of the continuous stream of data;
- and
- processing, by the database system, the data chunks on a chunk-by-chunk basis with a query rewind mechanism to sustain the SQL query as a single long-standing query that allows the UDFs and a state of the SQL query to be maintained.
1 more element
A tangible, non-transitory computer readable storage medium storing instructions that, when executed by a database system, cause the database system to:
- receiving, at a query engine, a continuous stream of data;
- processing, at the query engine, a Structured Query Language (SQL) query on the continuous stream of data on a chunk-by-chunk basis;
- and
- activating a query rewind mechanism to sustain the SQL query as a single long-standing query.
1 more element
A computing system, comprising:
- a database;
- a query engine in communication with the database, the query engine receives a continuous stream of data and a query;
- and
- a query rewind mechanism that processes, on a chunk-by-chunk basis, the continuous stream of data as a single long-standing query.
1 more element
Dependencies are inferred from the claim text.