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Query Rewind Mechanism for Processing a Continuous Stream of Data

  • US 20120078939A1
  • Filed: 09/23/2010
  • Published: 03/29/2012
  • Est. Priority Date: 09/23/2010
  • Status: Active Grant
First Claim
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1. ) A method executed by a database system, comprising:

  • receiving, at a query engine in the 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.

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