Intraquery Parallelism Intraquery parallelism:execution of a single query in parallel on multiple processors/disks;important for speeding up long-running queries. Two complementary forms of intraquery parallelism: Intraoperation Parallelism-parallelize the execution of each individual operation in the query Supports high degree of parallelism Interoperation Parallelism-execute the different operations in a query expression in parallel. Limited degree of parallelism Database System Concepts-7th Edition 22.4 ©Silberscha乜，Korth and SudarshanDatabase System Concepts - 7 22.4 ©Silberschatz, Korth and Sudarshan th Edition Intraquery Parallelism ▪ Intraquery parallelism: execution of a single query in parallel on multiple processors/disks; important for speeding up long-running queries. ▪ Two complementary forms of intraquery parallelism: • Intraoperation Parallelism– parallelize the execution of each individual operation in the query ▪ Supports high degree of parallelism • Interoperation Parallelism– execute the different operations in a query expression in parallel. ▪ Limited degree of parallelism