PostgreSQL 9.5 Alpha 1 发布，该版本值得关注的新特性包括： Block-Range Indexes (BRIN) which enable compact indexing of very large tables Large speed improvements in in-memory sorting and hashing Automated management of transaction log size INSERT ON CONFLICT UPDATE, otherwise known as "UPSERT" Grouping Sets, CUBE and ROLLUP analytic operations Row-Level Security (RLS) support More JSONB data manipulation functions and operators Added the pg_rewind tool and other high availability improvements to replication Multiple enhancements to Foreign Data Wrappers, including IMPORT FOREIGN SCHEMA Large increases in multi-core and large memory scalability
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