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Maintenance Release Changelog

2023-05-30 Version 8.1.5

  • Disabled semi-join operator reduction optimization.

2023-05-28 Version 8.1.4

  • Fixed an issue where the query optimizer could choose incorrectly between using the HashGroupBy or the StreamingGroupBy operators.

  • Added more information about blob files that need to be downloaded from unlimited storage to the blob cache when running PROFILE.

  • Fixed rare issue with sync durability and unlimited storage that could cause log file corruption in the blob storage.

  • Fixed an issue with optimizing queries containing no-operation predicates such as 1=1.

  • Improved the performance of a left join of a reference table with a sharded table by pushing the reference table clauses to the leaves. The engine variable disable_reference_table_leftjoin_where_pushdown must be set to "OFF" to enable this operation.

  • Now allowing child aggregator root users to be dropped even if the sync_permissionengine variable is enabled.

  • Removed the restrictions on the names of JWT users. Customers may now create users with names that look like UUIDs and emails.

2023-05-24 Version 8.1.3

  • Fixed a bug with error handling that produced spam messages.

  • Backups taken from the 8.1.3 release (and subsequent 8.1 releases) are no longer restorable into the previous 8.1 releases (8.1.1 and 8.1.2).

  • Removed the EXECUTE permission requirements for MongoDB API internal UDFs.

  • Changed the system information built-ins to use the utf8_general_ci collation for the collation_server value.