A Survey of IoT Stream Query Execution Latency Optimization within Edge and Cloud

Table 1

Categorization of query processing techniques within the context of their execution models.

Query processing techniques	Year	Query execution models
		Centralized	Geo-distributed query processing	Distributed	Edge-query processing
		Cloud-query Processing		Edge-cloud query processing
Iridium [4]	2015		✓
Clarinet [10]	2016		✓
SpanEdge [1]	2016			✓
IncApprox [41]	2016	✓
StreamApprox [42]	2017	✓
Sana [5]	2018		✓
SAQL [43]	2018	✓
AWStream [6]	2018		✓
Tetrium [7]	2018		✓
Sajjad et al. [15]	2018			✓
Amarasinghe et al. [3]	2018			✓
QueryGuard [39]	2018				✓
ApproxIoT [17]	2018			✓
CalculIoT [18]	2019			✓
WASP [8]	2020		✓
Oh et al. [9]	2020		✓
Dautov and Distefano [40]	2020				✓
Fossel [19]	2020				✓