| 摘要 |
Structured queries, such as those written using the Structured Query Language (SQL) can be an efficient mechanism for expressing the information sought to be obtained from a collection of data. Mechanisms can enable the use of structured queries to express data processing that can be performed in parallel in order to obtain the attendant efficiencies of such processing. The structured queries, whether standing alone or integrated into another programming context, can be translated into an intermediate form that can be compatible with, or equivalent to, the programming context into which they were integrated or some other high-level programming language. The intermediate, translated form can use core commands that abstract mechanisms that can be executed in parallel. The core commands include commands for applying a function in parallel and distributing and joining data in parallel, and also include aggregations of core commands directed to commonly performed functions. |
