Practical planning and execution of groupjoin and nested aggregates

Groupjoins combine execution of a join and a subsequent group-by . They are common in analytical queries and occur in about of the queries in TPC-H and TPC-DS. While they were originally invented to improve performance, efficient parallel execution of groupjoins can be limited by contention in many-...

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Vydané v:	The VLDB journal Ročník 32; číslo 6; s. 1165 - 1190
Hlavní autori:	Fent, Philipp, Birler, Altan, Neumann, Thomas
Médium:	Journal Article
Jazyk:	English
Vydavateľské údaje:	Berlin/Heidelberg Springer Berlin Heidelberg 01.11.2023 Springer Nature B.V
Predmet:	Aggregates Algorithms Computer Science Database Management Estimates Optimization Queries Semantics Special Issue Paper Query processing Parallel processing Query optimization
ISSN:	1066-8888, 0949-877X
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