Application of Filters to Multiway Joins in MapReduce

Table 2

Test datasets for distinct attribute joins.

Table	Number of records	Size	Number of records satisfying selection predicate
Supplier	3 M	0.4 GB	0.6 M
Part	60 M	6.9 GB	60 M * 0.2 * 𝜎𝑝
Partsupp	240 M	35 GB	240 M (no predicate)