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Performance optimizations"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"When the inverted index MATCH WHERE condition with a high filter rate is combined with the common WHERE condition with a low filter rate, the I/O of the index column is greatly reduced. 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"),(0,l.yg)("li",{parentName:"ul"},"Eliminate useless ",(0,l.yg)("inlineCode",{parentName:"li"},"order by")," operators from inline view to improve query performance."),(0,l.yg)("li",{parentName:"ul"},"Optimizes the accuracy of cardinality estimates and cost models in some cases. "),(0,l.yg)("li",{parentName:"ul"},"Optimized jdbc catalog predicate pushdown logic."),(0,l.yg)("li",{parentName:"ul"},"Optimized the read efficiency of the file cache when it's enable for the first time."),(0,l.yg)("li",{parentName:"ul"},"Optimizes the hive table sql cache policy and uses the partition update time stored in HMS to improve the cache hit ratio. "),(0,l.yg)("li",{parentName:"ul"},"Optimize mow compaction efficiency."),(0,l.yg)("li",{parentName:"ul"},"Optimized thread allocation logic for external table query to reduce memory usage "),(0,l.yg)("li",{parentName:"ul"},"Optimize memory usage for column reader.")),(0,l.yg)("h3",{id:"2-distributed-replica-management-improvements"},"2. Distributed replica management improvements"),(0,l.yg)("p",null,"Distributed replica management improvements include skipping partition deletion, colocate group deletion, balance failure due to continuous write, and hot and cold seperation table balance."),(0,l.yg)("h3",{id:"3-security-enhancement"},"3. Security enhancement"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"The audit log plug-in uses a token instead of a plaintext password to enhance security",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26278"},"https://github.com/apache/doris/pull/26278")))),(0,l.yg)("li",{parentName:"ul"},"log4j configures security enhancement",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/24861"},"https://github.com/apache/doris/pull/24861")," "))),(0,l.yg)("li",{parentName:"ul"},"Sensitive user information is not displayed in logs",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26912"},"https://github.com/apache/doris/pull/26912"))))),(0,l.yg)("h2",{id:"bugfix-and-stability"},"Bugfix and stability"),(0,l.yg)("h3",{id:"1-complex-datatypes"},"1. Complex datatypes"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"Fix issues that fixed-length CHAR(n) was not truncated correctly in map/struct.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25725"},"https://github.com/apache/doris/pull/25725")))),(0,l.yg)("li",{parentName:"ul"},"Fix write failure for struct datatype nested for map/array",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26973"},"https://github.com/apache/doris/pull/26973")))),(0,l.yg)("li",{parentName:"ul"},"Fix the issue that count distinct did not support array/map/struct ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25483"},"https://github.com/apache/doris/pull/25483")))),(0,l.yg)("li",{parentName:"ul"},"Fix be crash in updating to 2.0.3 after the delete complex type appeared in query ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26006"},"https://github.com/apache/doris/pull/26006")))),(0,l.yg)("li",{parentName:"ul"},"Fix be crash when JSON datatype is in WHERE clause.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27325"},"https://github.com/apache/doris/pull/27325")))),(0,l.yg)("li",{parentName:"ul"},"Fix be crash when ARRAY datatype is in OUTER JOIN clause.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25669"},"https://github.com/apache/doris/pull/25669")))),(0,l.yg)("li",{parentName:"ul"},"Fix reading incorrect result for DECIMAL datatype in ORC format.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26548"},"https://github.com/apache/doris/pull/26548")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25977"},"https://github.com/apache/doris/pull/25977")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26633"},"https://github.com/apache/doris/pull/26633"))))),(0,l.yg)("h3",{id:"2-inverted-index"},"2. Inverted index"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"Fix incorrect result for OR NOT combination in WHERE clause were incorrect when disable inverted index query. ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26327"},"https://github.com/apache/doris/pull/26327")))),(0,l.yg)("li",{parentName:"ul"},"Fix be crash when write a empty with inverted index",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25984"},"https://github.com/apache/doris/pull/25984")))),(0,l.yg)("li",{parentName:"ul"},"Fix be crash in index compaction when the output of compaction is empty.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25486"},"https://github.com/apache/doris/pull/25486")))),(0,l.yg)("li",{parentName:"ul"},"Fixed the problem of adding an inverted index to be crashed when no data is written to the newly added column."),(0,l.yg)("li",{parentName:"ul"},"Fix be crash when BUILD INDEX after ADD COLUMN without new data written.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27276"},"https://github.com/apache/doris/pull/27276")))),(0,l.yg)("li",{parentName:"ul"},"Fix missing and leak problem of hardlink for inverted index file.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26903"},"https://github.com/apache/doris/pull/26903")))),(0,l.yg)("li",{parentName:"ul"},"Fix index file corrupt when disk is full temporarilly",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/28191"},"https://github.com/apache/doris/pull/28191")))),(0,l.yg)("li",{parentName:"ul"},"Fix incorrect result due to optimization for skip reading index column",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/28104"},"https://github.com/apache/doris/pull/28104"))))),(0,l.yg)("h3",{id:"3-materialized-view"},"3. Materialized View"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"Fix the problem of BE crash caused by repeated expressions in the group by statement"),(0,l.yg)("li",{parentName:"ul"},"Fix be crash when there are duplicate expressions in ",(0,l.yg)("inlineCode",{parentName:"li"},"group by")," statements.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27523"},"https://github.com/apache/doris/pull/27523")))),(0,l.yg)("li",{parentName:"ul"},"Disables the float/doubld type in the ",(0,l.yg)("inlineCode",{parentName:"li"},"group by")," clause when a view is created. ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25823"},"https://github.com/apache/doris/pull/25823")))),(0,l.yg)("li",{parentName:"ul"},"Improve the function of select query matching materialized view ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/24691"},"https://github.com/apache/doris/pull/24691")," "))),(0,l.yg)("li",{parentName:"ul"},"Fix an issue that materialized views could not be matched when a table alias was used ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25321"},"https://github.com/apache/doris/pull/25321")))),(0,l.yg)("li",{parentName:"ul"},"Fix the problem using percentile_approx when creating materialized views ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26528"},"https://github.com/apache/doris/pull/26528"))))),(0,l.yg)("h3",{id:"4-table-sample"},"4. Table sample"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"Fix the problem that table sample query can not work on table with partitions.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25912"},"https://github.com/apache/doris/pull/25912")," "))),(0,l.yg)("li",{parentName:"ul"},"Fix the problem that table sample query can not work when specify tablet.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25378"},"https://github.com/apache/doris/pull/25378")," ")))),(0,l.yg)("h3",{id:"5-unique-with-merge-on-write"},"5. Unique with merge on write"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"Fix null pointer exception in conditional update based on primary key ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26881"},"https://github.com/apache/doris/pull/26881")," "))),(0,l.yg)("li",{parentName:"ul"},"Fix field name capitalization issues in partial update ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27223"},"https://github.com/apache/doris/pull/27223")," "))),(0,l.yg)("li",{parentName:"ul"},"Fix duplicate keys occur in mow during schema change repairement. ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25705"},"https://github.com/apache/doris/pull/25705"))))),(0,l.yg)("h3",{id:"6-load-and-compaction"},"6. Load and compaction"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"Fix unkown slot descriptor error in routineload for running multiple tables ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25762"},"https://github.com/apache/doris/pull/25762")))),(0,l.yg)("li",{parentName:"ul"},"Fix be crash due to concurrent memory access when caculating memory ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27101"},"https://github.com/apache/doris/pull/27101")," "))),(0,l.yg)("li",{parentName:"ul"},"Fix be crash on duplicate cancel for load.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27111"},"https://github.com/apache/doris/pull/27111")))),(0,l.yg)("li",{parentName:"ul"},"Fix broker connection error during broker load",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26050"},"https://github.com/apache/doris/pull/26050")))),(0,l.yg)("li",{parentName:"ul"},"Fix incorrect result delete predicates in concurrent case of compation and scan.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/24638"},"https://github.com/apache/doris/pull/24638")))),(0,l.yg)("li",{parentName:"ul"},"Fix the problem tha compaction task would print too many stacktrace logs ",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25597"},"https://github.com/apache/doris/pull/25597"))))),(0,l.yg)("h3",{id:"7-data-lake-compatibility"},"7. 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SQL Planner and Optimizer"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("p",{parentName:"li"},"Fix partition prune error in some scenes"),(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27047"},"https://github.com/apache/doris/pull/27047")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26873"},"https://github.com/apache/doris/pull/26873")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25769"},"https://github.com/apache/doris/pull/25769")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27636"},"https://github.com/apache/doris/pull/27636")))),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("p",{parentName:"li"},"Fix incorrect sub-query processing in some scenarios"),(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26034"},"https://github.com/apache/doris/pull/26034")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25492"},"https://github.com/apache/doris/pull/25492")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25955"},"https://github.com/apache/doris/pull/25955")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27177"},"https://github.com/apache/doris/pull/27177")))),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("p",{parentName:"li"},"Fix some semantic parsing errors"),(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/24928"},"https://github.com/apache/doris/pull/24928")),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25627"},"https://github.com/apache/doris/pull/25627")))),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("p",{parentName:"li"},"Fix data loss during right outer/anti join"),(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26529"},"https://github.com/apache/doris/pull/26529")))),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("p",{parentName:"li"},"Fix incorrect pushing down of predicate pass aggregation operators."),(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25525"},"https://github.com/apache/doris/pull/25525")))),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("p",{parentName:"li"},"Fix incorrect result header in some cases"),(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/25372"},"https://github.com/apache/doris/pull/25372")))),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("p",{parentName:"li"},"Fix incorrect plan when the nullsafeEquals expression (<=>) is used as the join condition"),(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/27127"},"https://github.com/apache/doris/pull/27127")))),(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("p",{parentName:"li"},"Fix correct column prune in set operation operator."),(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/26884"},"https://github.com/apache/doris/pull/26884"))))),(0,l.yg)("h3",{id:"others"},"Others"),(0,l.yg)("ul",null,(0,l.yg)("li",{parentName:"ul"},"Fix BE crash when the order of columns in a table is changed and then upgraded to 2.0.3.",(0,l.yg)("ul",{parentName:"li"},(0,l.yg)("li",{parentName:"ul"},(0,l.yg)("a",{parentName:"li",href:"https://github.com/apache/doris/pull/28205"},"https://github.com/apache/doris/pull/28205"))))),(0,l.yg)("p",null,"See the complete list of improvements and bug fixes on ",(0,l.yg)("a",{parentName:"p",href:"https://github.com/apache/doris/issues?q=label%3Adev%2F2.0.3-merged+is%3Aclosed"},"github dev/2.0.3-merged")," ."))}h.isMDXComponent=!0}}]); |