PostgreSQL 11 beta 2 发布，bug 修复版本

PostgreSQL 11 beta 2 发布了，PostgreSQL (也叫 Postgres)是一个自由的对象-关系数据库服务器(数据库管理系统)，它在灵活的 BSD-风格许可证下发行。它提供了相对其他开放源代码数据库系统(比如 MySQL 和 Firebird)，和对专有系统比如 Oracle、Sybase、IBM 的 DB2 和 Microsoft SQL Server的一种选择。

此版本修复了众多 bug：

• Several fixes for XML support, including using the document node as the context for XPath queries as defined in the SQL standard, which affects the xpath and  xpath_exists functions, as well as XMLTABLE

• Several fixes related to VACUUM, including potential data corruption issues

• Fixes for partitioning, including ensuring partitioning works with temporary tables, eliminating a needless additional partition constraint checks on INSERT s and generating incorrect paths for partitionwise aggregates

• Fix for potential replica server crashes where a replica would attempt to read a recycled WAL segment

• Fixes for pg_replication_slot_advance including returning  NULL if slot is not advanced and changes for how the slot is updated depending on if it is a physical or logical replication slot

• Ensure pg_resetwal works with relative paths to data directory

• Fixes for query parallelism, including preventing a crash by ignoring "parallel append" for parallel unsafe paths in a query plan

• Fix returning accurate results with variance and similar aggregate functions when executed using parallel query

• Fix issue where COPY FROM .. WITH HEADER would drop a line after every 4,294,967,296 lines processed

• Ensure the "B" (bytes) parameter is accepted by all memory-related configuration parameters

• Several fixes for the JSONB transform in PL/Python and PL/Perl

• Fix for plpgsql checking statements where it needs to check original write statement before rewrite, could cause crash

• Fix for SHOW ALL to display superuser configuration settings to roles that are allowed to read all settings

• Fix for pg_upgrade that ensures defaults are written when using the "fast ALTER TABLE .. ADD COLUMN" feature with a non-NULL default

• Several fixes for memory leaks

• Several fixes specific to the Windows platform

同时包含 tzdata 版本 2018e。

详情查看 发布公告 。

下载地址：https://www.postgresql.org/download/