Decorrelation of user-defined function invocations in queries
US10191943B2 · kind B2 · utility
1Cited by
5References
11Claims
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Key dates
| Filing date | Jan 31, 2014 |
| Grant date | Jan 29, 2019 |
| Priority date | — |
| Expiry date | Feb 24, 2036 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F16/9027
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
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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