Decorrelation of user-defined function invocations in queries

Simhadri (2015) Decorrelation of user-defined function invocations in queries. US20150220597A1.

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Systems, methods, and computer-readable medium, are disclosed for transforming user-defined-function invocations in a query-based environment. A user-defined-function (UDF) and a query invoking the UDF are received. The UDF is parsed into a plurality of statements. A first expression tree corresponding to the UDF and a second expression tree corresponding the query are constructed, and merged using an operator to generate a transformed expression. The transformed expression is simplified, using transformation rules, if it is determined that is can be simplified.

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IITH Creators:
IITH CreatorsORCiD
Item Type: Patent
Subjects: Computer science
Divisions: Department of Computer Science & Engineering
Depositing User: Team Library
Date Deposited: 18 Aug 2017 11:32
Last Modified: 18 Aug 2017 11:32
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