The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 27, 2022
Filed:
Nov. 15, 2021
Implementing multidimensional two-sided interval joins using sampling-based input-domain demarcation
Snowflake Inc., Bozeman, MT (US);
Matthias Carl Adams, Berlin, DE;
Spyridon Triantafyllis, Belmont, CA (US);
Lars Volker, Los Altos, CA (US);
Kevin Wang, Ottawa, CA;
Snowflake Inc., Bozeman, MT (US);
Abstract
In an embodiment, a data platform receives a query that includes a two-sided N dimensional interval join of first and second input relations. The data platform samples, with respect to each of one or more of the N dimensions, one or both of the first input relation and the second input relation with respect to an interval size of an interval determined from the input relation. The data platform demarcates the N dimensional input domain into non-overlapping N dimensional input-domain cells based on the sampling. The data platform implements the interval join using a query-execution plan that includes an equality join that is keyed on input-domain-cell identifiers of input-domain cells that at least partially overlap bounding polygons of the intervals determined from the first and second input relations. The equality join is followed in the query-execution plan by a filter that applies the interval-join predicate. The data platform obtains results of the query by executing the query-execution plan.