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- W2364316249 abstract "Join is one of the basic operations in relational and object relational databases.In the case of relational,the join predicate is a Boolean expression consisting of arithmetic comparisons,and there are many high performance processing algorithms,such as sort merge,hash join and nested loop with index.However,In the case of object relational,user defined functions (UDFs) can be involved in the join predicate,and the UDF likes black boxes for the optimizer and execution engines,so the algorithms for the computation of relational joins can not be used for the joins containing UDFs directly.In this paper,the characteristic of UDF is studied,and if a transforming function T R can be used to the variables of the UDF,then it can also be processed efficiently and the former algorithms can be reused.This idea is also illustrated by an example." @default.
- W2364316249 created "2016-06-24" @default.
- W2364316249 creator A5062279899 @default.
- W2364316249 date "2000-01-01" @default.
- W2364316249 modified "2023-09-25" @default.
- W2364316249 title "Efficiently Processing Method for a Specific Kind of Join Predicates in ORDB" @default.
- W2364316249 hasPublicationYear "2000" @default.
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