v.18.1
Backward Incompatible Changes
1Bug Fix
8- Fixed TRUNCATE Command for Temporary Tables
- Fixed Deadlock in ZooKeeper Client Library During Network Errors
- Fixed CAST Error for Nullable Types in ClickHouse
- Fixed maxIntersection() Function for Coinciding Interval Boundaries
- Fixed OR Expression Chain Transformation in Function Argument
- Fixed Performance Degradation for IN (Subquery) Expressions
- Fixed CAST Function Incompatibility in Distributed Queries
- Added Identifier Quoting for External DBMS Queries
Improvement
3New Feature
6- Support for ALTER TABLE t DELETE WHERE in Non-Replicated MergeTree Tables
- Support for Arbitrary Types in uniq* Aggregate Functions
- Support for Arbitrary Types in Comparison Operators
- Setting Subnet Mask in users.xml for IPv6 Networks
- Added arrayDistinct function
- SummingMergeTree Engine Supports AggregateFunction Type Columns