Apache IoTDB 1.2.0

New Feature

• [IOTDB-5567] add SQL for querying seriesslotid and timeslotid
• [IOTDB-5631] Add a built-in aggregation functions named time_duration
• [IOTDB-5636] Add round as built-in scalar function
• [IOTDB-5637] Add substr as built-in scalar function
• [IOTDB-5638] Support case when syntax in IoTDB
• [IOTDB-5643] Add REPLACE as a built-in scalar function
• [IOTDB-5683] Support aggregation function Mode for query
• [IOTDB-5711] Python API should support connecting multiple nodes
• [IOTDB-5752] Python Client supports write redirection
• [IOTDB-5765] Support Order By Expression
• [IOTDB-5771] add SPRINTZ and RLBE encodor and LZMA2 compressor
• [IOTDB-5924] Add SessionPool deletion API
• [IOTDB-5950] Support Dynamic Schema Template
• [IOTDB-5951] Support show timeseries/device with specific string contained in path
• [IOTDB-5955] Support create timeseries using schema template in Session API

Improvements

• [IOTDB-5630] Make function cast a built-in function
• [IOTDB-5689] Close Isink when ISourceHandle is closed
• [IOTDB-5715] Improve the performance of query order by time desc
• [IOTDB-5763] Optimize the memory estimate for INTO operations
• [IOTDB-5887] Optimize the construction performance of PathPatternTree without wildcards
• [IOTDB-5888] TTL logs didn' t consider timestamp precision
• [IOTDB-5896] Failed to execute delete statement
• [IOTDB-5908] Add more query metrics
• [IOTDB-5911] print-iotdb-data-dir tool cannot work
• [IOTDB-5914] Remove redundant debug log in Session
• [IOTDB-5919] show variables add a variable timestamp_precision
• [IOTDB-5926] Optimize metric implementation
• [IOTDB-5929] Enable DataPartition inherit policy
• [IOTDB-5943] Avoid rpc invoking for SimpleQueryTerminator when endpoint is local address
• [IOTDB-5944] Follower doesn' t need to update last cache when using IoT_consensus
• [IOTDB-5945] Add a cache to avoid initialize duplicated device id object in write process
• [IOTDB-5946] Optimize the implement of tablet in Go client
• [IOTDB-5949] Support show timeseries with datatype filter
• [IOTDB-5952] Support FIFO strategy in DataNodeSchemaCache
• [IOTDB-6022] The WAL piles up when multi-replica iotconsensus is written at high concurrency

Bug Fixes

• [IOTDB-5604] NPE when execute Agg + align by device query without assigned DataRegion
• [IOTDB-5619] group by tags query NPE
• [IOTDB-5644] Unexpected result when there are no select expressions after analyzed in query
• [IOTDB-5657] Limit does not take effect in last query
• [IOTDB-5700] UDF query did not clean temp file after the query is finished
• [IOTDB-5716] Wrong dependency when pipeline consumeOneByOneOperator
• [IOTDB-5717] Incorrect result when querying with limit push-downing & order by time desc
• [IOTDB-5722] Wrong default execution branch in PlanVisitor
• [IOTDB-5735] The result of adding the distinct function to the align by device is incorrect
• [IOTDB-5755] Fix the problem that 123w can not be used in Identifier
• [IOTDB-5756] NPE when where predicate is NotEqualExpression and one of subExpression is not exist
• [IOTDB-5757] Not Supported Exception when use like ' s3 || false' in where even Type of s3 is Boolean
• [IOTDB-5760] Query is blocked because of no memory
• [IOTDB-5764] Cannot specify alias successfully when the FROM clause contains multiple path suffixes
• [IOTDB-5769] Offset doesn' t take effect in some special case
• [IOTDB-5774] The syntax that path nodes start or end with a wildcard to fuzzy match is not supported
• [IOTDB-5784] Incorrect result when querying with offset push-down and time filter
• [IOTDB-5815] NPE when using UDF to query
• [IOTDB-5837] Exceptions for select into using placeholders
• [IOTDB-5851] Using limit clause in show devices query will throw NPE
• [IOTDB-5858] Metric doesn' t display the schemaCache hit ratio
• [IOTDB-5861] Last quey is incomplete
• [IOTDB-5889] TTL Cannot delete expired tsfiles
• [IOTDB-5897] NullPointerException In compaction
• [IOTDB-5905] Some aligned timeseries data point lost after flush
• [IOTDB-5934] Optimize cluster partition policy
• [IOTDB-5953] LastCache memory control param does not take effect
• [IOTDB-5963] Sometimes we may get out-of-order query result
• [IOTDB-6016] Release file num cost after cross compaction task

New Contributors

• @EliasMei made their first contribution in #9291
• @nikam14 made their first contribution in #9368
• @riverbuilding made their first contribution in #9379
• @lichenyu20 made their first contribution in #9458

Full Changelog: v1.1.2...v1.2.0