MySQL 5.7.12 发布

MySQL 5.7.12 发布了。

安全提升：

• InnoDB:        The InnoDB tablespace encryption feature,        which provides at-rest data encryption for        InnoDB tables, now supports Oracle Key Vault        for encryption key management. Oracle Key Vault support relies        on the keyring_okv plugin which is available        in MySQL Enterprise Edition. A secure and robust encryption key management solution        such as OKV is critical for security and for compliance with        various security standards. For more information, see        InnoDB Tablespace Encryption.

• The linked OpenSSL library for the MySQL Commercial Server has        been updated to version 1.0.1s. Issues fixed in the new version        are described at        http://www.openssl.org/news/vulnerabilities.html.

  This change does not affect the Oracle-produced MySQL Community        build of MySQL Server, which uses the yaSSL library instead.       (Bug #22685885, Bug #22923458)

• MySQL Enterprise Edition now includes a keyring_okv plugin that        uses Oracle Key Vault for keyring backend storage. For more        information, see The MySQL Keyring.

功能增加：

• For queries with many OR conditions, the        optimizer now is more memory-efficient and less likely to exceed        the memory limit imposed by the        range_optimizer_max_mem_size        system variable. In addition, the default value for that        variable has been raised from 1536000 to 8388608.       (Bug #79450, Bug #22283790)

Bug 修复：

• InnoDB; Partitioning:        INSERT and        SELECT statements against a        partitioned InnoDB table having        generated columns were not always handled correctly.       (Bug #22444530)

  References: See also Bug #21776494, Bug #21824564, Bug #21864838.

• InnoDB:        An error was returned on startup when a replication slave        attempted to access an encrypted table. The server UUID used to        compose the master key name was not persisted to the tablespace        data file, resulting in the use of an incorrect master key.       (Bug #22912582)

• InnoDB:        In debug builds, an unnecessary        buf_block_align() call could cause a latching        order violation. A DML operation resulted in a page mismatch        assertion due to the same buf_block_align()        call.       (Bug #22709463, Bug #21321238)

• InnoDB:        An ALTER TABLE ...        ADD COLUMN operation on a table with virtual columns        raised an assertion.       (Bug #22650296)

• InnoDB:        An unnecessary comparison in tablespace encryption code caused        compiler warnings.       (Bug #22645816)

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