We show how to parallelize query optimization at a massive scale. We present algorithms for parallel query optimization in left-deep and bushy plan spaces. At optimization start, we divide the plan space for a given query into partitions of equal size that are explored in parallel by worker ...
Borla-Salamet, “The Impact of the KSR1 AllCache Architecture on the Behaviour of the DBS3 Parallel DBMS”, Int. Conf. on Parallel Architectures and Language Europe, Athens, Greece, July 1994. Google Scholar G. Gardarin, P. Valduriez, “ESQL2, an Extended SQL2 with F-logic Semantics....
假设 transformer 的层数是l，transformer 输入输出的维度是d，MHA 的头数是h，query、key、value 的维...
Furthermore, we extensively evaluate linear algebra query processing and operator fusion utilizing the widely-used Star Schema and TPC-DI benchmarks. Through comprehensive evaluations, we demonstrate the effectiveness and potential of our approach in improving the efficiency of data processing and machine...
When set to HASH, this parameter converts a correlated EXISTS subquery into a view query block and semi-join which is evaluated in parallel. For a specific query, place the HASH_SJ or MERGE_SJ hint into the EXISTS subquery. HASH_SJ uses a hash semi-join and MERGE_SJ uses a sort merge...
This paper describes a computer-cluster based parallel database management system ( DBMS ), InfiniteDB, developed by the authors. InfiniteDB aims at effici... LI Jianzhong,W Zhang - 《计算机科学前沿》 被引量: 3发表: 2009年 Query Optimization over Parallel Relational Data Warehouses in Distribut...
Query optimization for sequential execution of non-recursive queries has reached a high level of sophistication in commercial DBMS. The successful application of parallel processing for the evaluation of recursive queries will require a ... T Zurek,P Thanisch - Springer-Verlag 被引量: 4发表: 1995...
2.1.6 Distributed and parallel DBMS So far we have assumed that an RDBMS is running on a single server. In this context, issues related to the support of a concurrent access are handled using transactions and their ACID properties. Nevertheless, due to scalability, security, or location aspects...
Toad is a SQL Server DBMS toolset developed by Quest. It increases productivity by using extensive automation, intuitive workflows, and built-in expertise. This SQL management tool resolve issues, manage change and promote the highest levels of code quality for both relational and non-relational ...
Kersten, “Analysis of a dynamic query optimization technique for multi-join queries,” Int. Conf. on Information and Knowledge Engineering, Washington, 1992. C.B. Walton, A.G. Dale, and R.M. Jenevin, “A taxonomy and performance model of data skew effects in parallel joins,” Int. ...