Hi zhengguo, I look forward to the release of the new version. I think there are some bug fixes in our pr list. Do you want to check which ones need to be incorporated during this release?
Ling Miao 寒江雪 <yangz...@gmail.com> 于2021年2月9日周二 上午10:00写道： > Hi all: > Since the release of 0.13, Apache Doris (incubating) contains around > 390 new features, bug fixes, performance enhancements, documentation > improvements, code refactors from 60+ contributors. > Now we are ready to release Apache Doris (incubating) 0.14.0. I will > be the release manager of this version. This release is expected to > include the following content: > > # New Feature > > ### Import and delete > > Support to delete multiple pieces of data at one time through the import > method to avoid performance degradation caused by multiple deletions. For > tables of the UniqueKey model, support to specify the Sequence column when > importing. Doris will judge the sequence of the data according to the value > of the Sequence column to ensure that the data is imported Time order > [#4310] [#4256] > > ### Support database backup > > The support in the backup stmt specifies the backup content (metadata and > data). > Support exclude backup and restore some tables in stmt. When backing up the > entire database, you can exclude some very large and unimportant tables. > Supports backing up and restoring the entire database instead of declaring > each table name in the backup and restore statement. > > [#5314] > > ### ODBC external table support > > Support access to external tables such as MySQL, postgresql, Oracle, etc. > through ODBC protocol > > [#4798] [#4438] [#4559] [#4699] > > ### Support SQL level and Partition level result Cache > > Support for caching query results to improve the efficiency of repeated > queries, support SQL-level and Partition-level results Cache [#4330] > > ### Built-in functions > > - Support bitmap_xor function [#5098] > - Add replace() function [#4347] > - Add the time_round function to support time alignment according to > multiple time granularities [#4640] > > ### FE interface and HTTP interface > > - The new FE UI interface can be enabled by setting the FE configuration > item enable_http_server_v2 [#4684] > > - BE adds an http interface to show the distribution of all tablets in a > partition among different disks in a BE [#5096] > - BE adds an http interface to manually migrate a tablet to other disks on > the same node [#5101] > - Support to modify the configuration items of FE and BE through http, and > persist these modifications [#4704] > - > > ### Compatibility with MySQL > > - Added support for views table in the information_schema database [#4778] > - Added table_privileges, schema_privileges and user_privileges to the > information_schema library for compatibility with certain MySQL > applications [#4899] > - A new statistic table is added to the information_schema meta-database > for compatibility with some MySQL tools [#4991] > > ### Monitoring > > - BE added tablet-level monitoring indicators, including scanned data > volume and row number, written data volume and row number, to help locate > hot tablets [#4428] > > - BE added metrics to view the usage of various LRU caches [#4688] > > ### Table building related > > - Added CREATE TABLE LIKE statement to facilitate the creation of a table > metadata copy [#4705] > - Support atomic replacement of two tables through replace statement > [#4669] > > ### Other > > - Support adding Optimizer Hints of type SET_VAR in the Select statement to > set session variables [#4504] > > - Support to repair damaged tablets by filling in empty tablets [#4255] > - Support Bucket Shuffle Join function (when the Join condition column is a > subset of the table bucket column, the right table will be shuffled to the > node where the data in the left table is located, which can significantly > reduce the network overhead caused by Shuffle Join and improve query speed) > [# 4677] > - Support batch cancel import tasks through cancel load statement [#4515] > - Add a Session variable to set whether to allow the partition column to be > NULL [#5013] > - Support TopN aggregation function [#4803] > - Support a new data balancing logic based on the number of partitions and > buckets [#5010] > - Support creating indexes on the value column of unique table [#5305] > > # Enhancement > > ### Performance improvement > > - Implemented a new compaction selection algorithm, providing lower write > amplification and a more reasonable compaction strategy [#4212] > - Optimize bit operation efficiency in variable length coding [#4366] > - Improve the execution efficiency of monery_format function [#4672] > - Optimize query execution plan: When the bucket column of the table is a > subset of the GroupBy column in SQL, reduce the data shuffle step [#4482] > - Improve the efficiency of column name search on BE [#4779] > - Improve the performance of the BE side LRU Cache [#4781] > - Optimized the tablet selection strategy of Compaction, reducing the > number of invalid selections [#4964] > - Optimized the reading efficiency of Unique Key table [#4958] > - Optimized the memory usage of LoadJob on the FE side and reduced the > memory overhead on the FE side [#4993] > - Reduce the lock granularity in FE metadata from Database level to Table > level to support more fine-grained concurrent access to metadata [#3775] > - Avoid unnecessary memory copy when creating hash table [#5301] > - Remove the path check when BE starts to speed up BE startup speed [#5268] > - Optimize the import performance of Json data [#5114] > > ### Functional improvements > > - SQL supports collate utf8_general_ci syntax to improve MySQL syntax > compatibility [#4365] > - Improve the function of Batch delete, improve and optimize the related > compaction process [#4425] > - Enhance the function of parse_url() function, support lowercase, support > parsing port [#4429] > - When SQL execution specifies the execution mode of join (Join Hint), the > Colocation Join function will be disabled by default [#4497] > - Dynamic partition support hour level [#4514] > - HTTP interface on BE side supports gzip compression [#4533] > - Optimized the use of threads on the BE side [#4440] > - Optimize the checking process and error message of the rand() function in > the query analysis stage [#4439] > - Optimize the compaction triggering and execution logic to better limit > the resource overhead (mainly memory overhead) of the compaction operation, > and trigger the compaction operation more reasonably [#4670] > - Support pushing Limit conditions to ODBC/MySQL external tables [#4707] > - Increase the limit on the number of tablet versions on the BE side to > prevent excessive data versions from causing abnormal cluster load [#4687] > - When an RPC error occurs in a query, it can quickly return specific error > information to prevent the query from being stuck [#4702] > - Support automatic mapping of count(distinct if(bool, bitmap, null)) to > bitmap_union_count function [#4201] > - Support set sql_mode = concat(@@sql_mode, "STRICT_TRANS_TABLES") > statement [#4359] > - Support all stream load features in multiload [#4717] > - Optimize BE’s strategy for selecting disks when creating tablets, and use > the "two random choices" algorithm to ensure tablet copies are more even > [#4373] > - When creating a materialized view, the bitmap_union aggregation method > only supports integer columns, and hll_union does not support decimal > columns [#4432] > - Optimize the log level of some FEs to avoid log writing becoming a > bottleneck [#4766] > - In the describe table statement, display the definition expression of the > aggregate column of the materialized view [#4446] > - Support convert() function [#4364] > -Support cast (expr as signed/unsigned int) syntax to be compatible > with MySQL ecology > -Add more columns to the information_schema.columns table to be > compatible with the MySQL ecosystem > - In Spark Load function, use yarn command line instead of yarn-client API > to kill job or get job status [#4383] > - Persistence of stale rowset meta-information to ensure that this > information will not be lost after BE restarts [#4454] > - Return an error code in the schema change result to more clearly inform > the user of the specific error [#4388] > - Optimize the rowset selection logic of some compactions to make the > selection strategy more accurate [#5152] > - Optimize the Page Cache on the BE side, divide Page into data cache and > index cache [#5008] > - Optimized the accuracy of functions such as variance and standard > deviation on Decimal type [#4959] > - Optimized the processing logic of predicates pushed down to ScanNode to > avoid repeated filtering of predicate conditions at the query layer and > improve query efficiency [#4999] > - Optimized the predicate push-down logic of Unique Key table, and supports > push-down the conditions of non-primary key columns [#5022] > - Support pushing down "not in" and "!=" to the storage layer to improve > query efficiency [#5207] > - Support writing multiple memtables of a tablet in parallel during import. > Improve import efficiency [#5163] > - Optimize the creation logic of ZoneMap. When the number of rows on a page > is too small, ZoneMap will not be created anymore [#5260] > - Added histogram monitoring indicator class on BE [#5148] > - When importing Parquet files, if there is a parsing error, the specific > file name will be displayed in the error message [#4954] > - Optimize the creation logic of dynamic partitions, the table under > construction directly triggers the creation of dynamic partitions [#5209] > - In the result of the SHOW BACKENDS command, display the real start time > of BE [#4872] > - Support column names start with @ symbol, mainly used to support mapping > ES tables [#5006] > - Optimize the logic of the mapping and conversion relationship of the > declared columns in the import statement to make the use more clear [#5140] > - Optimize the execution logic of colocation join to make the query plan > more evenly executed on multiple BE nodes [#5104] > - Optimize the predicate pushdown logic, and support pushdown of is null > and is not null to the storage engine [#5092] > - Optimize the BE node selection logic in bucket join [#5133] > - Support UDF in import operation [#4863] > > ### Other > > - Added support for IN Predicate in delete statement [#4404] > - Update the Dockerfile of the development image and add some new > dependencies [#4474] > - Fix various spelling errors in the code and documentation [#4714] [#4712] > [#4722] [#4723] [#4724] [#4725] [#4726] [#4727] > - Added two segment-related indicators in the OlapScanNode of the query > profile to display the total number of segments and the number of filtered > segments [#4348] > - Add batch delete function description document [#4435] > - Added Spark Load syntax manual [#4463] > - Added the display of cumulative compaction strategy name and rowset data > size in BE's /api/compaction/show API [#4466] > - Redirect the Spark Launcher log in Spark Load to a separate log file for > easy viewing [#4470] > - The BE configuration item streaming_load_max_batch_size_mb was renamed > streaming_load_json_max_mb to make its meaning more clear [#4791] > - Adjust the default value of the FE configuration item > thrift_client_timeout_ms to solve the problem of too long access to the > information_schema library [#4808] > - CPU or memory sampling of BE process is supported on BE web page to > facilitate performance debugging [#4632] > - Extend the data slicing balance class on the FE side, so that it can > extend more balance logic [#4771] > - The reorganized OLAP_SCAN_NODE profile information makes the profile > clearer and easier to read [#4825] > - Added monitoring indicators on the BE side to monitor cancelled Query > Fragment [#4862] > - Reorganized the profile information of HASH_JOIN_NODE, CROSS_JOIN_NODE, > UNION_NODE, ANALYTIC_EVAL_NODE to make the Profile more clear and easy to > read [#4878] > - Modify the default value of > query_colocate_join_memory_limit_penalty_factor to 1 to ensure that the > default memory limit of the execution plan fragment is consistent with the > user setting during the colocation join operation [#4895] > - Added consideration of tablet scanning frequency in the selection of > compaction strategy on the BE side [#4837] > - Optimize the strategy of sending Query Fragments and reduce the number of > sending public attributes to improve query plan scheduling performance > [#4904] > - Optimized the accuracy of load statistics for unavailable nodes when the > query scheduler is scheduling query plans [#4914] > - Add the code version information of the FE node in the result of the SHOW > FRONTENDS statement [#4943] > - Support more column type conversion, such as support conversion from CHAR > to numeric type, etc. [#4938] > - Import function to identify complex types in Parquet files [#4968] > - In the BE monitoring indicators, increase the monitoring of used permits > and waiting permits in the compaction logic [#4893] > - Optimize the execution time of BE single test [#5131] > - Added more JVM-related monitoring items on the FE side [#5112] > - Add a session variable to control the timeout period for the transaction > to take effect in the insert operation [#5170] > - Optimize the logic of selecting scan nodes for query execution plans, and > consider all ScanNode nodes in a query [#4984] > - Add more system monitoring indicators for FE nodes [#5149] > - Use of VLOG in unified BE code [#5264] > > # Other > > - Add some non-Apache protocol code protocol declarations to the NOTICE > file [#4831] > > - Reformatted the code of BE using clang-format [#4965] > > - Added clang-format checking and formatting scripts to unify the C++ code > style of BE before submission [#4934] > > - The third-party library adds the AWS S3 SDK, which can be used to > directly read the data in the object storage through the SDK [#5234] > > - Fixed some issues related to License: [#4371] > > 1. The dependencies of the two third-party libraries, MySQL client and > LZO, will no longer be enabled in the default compilation options. If users > need MySQL external table function, they need to turn it on > > 2. Removed the js and css code in the code library and introduced it in > the form of a third-party library dependency > > - Updated the Docker development environment image build-env-1.2 > > - Updated the compilation method of the UnixODBC tripartite library, so > that the BE process no longer depends on the libltdl.so dynamic library of > the system when it is running > > - Added third-party UDF to support more efficient set calculation of > orthogonal bitmap data [#4198] > > - Added UnixODBC third-party library dependency to support ODBC external > table function [#4377] > > # API Change > > - Prohibit the creation of segment v1 tables [#4913] > - Rename the configuration item `streaming_load_max_batch_size_mb` to > `streaming_load_json_max_mb` [#4791] > - Support column reference passing in column definition of load statement > [#5140] > - Support creating indexes on the value column of unique table [#5305] > - Support atomic replacement of two tables through replace statement > [#4669] > - Support CREATE TABLE LIKE statement > > To get more details please refers to ISSUE > https://github.com/apache/incubator-doris/issues/5374 > If you have any important feature that are in progress or not merged > into the master and related to version 0.14, please reply to me by email. >
