PostgreSQL 9.4 RC1 发布，JSONB 数据类型

PostgreSQL 9.4 RC1 发布，此版本现已提供下载，文档请前往这里查看。

主要更新内容请看：

• Allow materialized views to be refreshed without blocking reads

• Add support for logical decoding of WAL data, to allow database changes to be streamed out in a customizable format

• Allow background worker processes to be dynamically registered, started and terminated

• Add jsonb, a more capable and efficient data type for storingJSONdata

• Add newSQLcommand ALTER SYSTEM for updating postgresql.conf configuration file entries

• Reduce lock strength for some ALTER TABLE commands

更多内容请看：Postgres 9.4 重要特性：jsonb 数据类型

完整改进内容请看发行说明，其他描述或者最新特性请看 9.4 Features Wiki Page。