December 2023 Update

Documentation

Core Library

  • Add support for k range frames in Window operator.

  • Add support for aggregations over sorted inputs to StreamingAggregation.

  • Add support for TTL in AsyncDataCache and SsdCache. #6412

  • Add support for TypeSignature Parser using Flex and Bison. This is used to parse function signatures.

  • Add support for spilling during the output processing stage of the OrderBy operator.

  • Add support for metrics related to memory arbitration and spilling. #7940, #8025

  • Add config max_spill_bytes to bound the storage used for spilling. The default value is set to 100GB. If it is set to zero, then there is no limit.

  • Add Status class that can be used to carry the success or error state of an operation. This is similar to arrow::Status.

  • Add Expand operator.

  • Add config max_arbitrary_buffer_size to set the maximum size in bytes for a task’s buffered output when the output is distributed randomly among consumers. The producer drivers are blocked when the buffer size exceeds this config.

  • Fix reclaiming memory from hash build operators in grouped execution mode. #8178

  • Fix non-termination of hash join in certain conditions. #7925, #8012.

  • Fix non-termination of the distinct aggregation in certain conditions. #7968.

  • Fix LimitNode offset and count values from overflowing.

Presto Functions

  • Add support for TIMESTAMP WITH TIME ZONE input type to format_datetime() function.

  • Add support for UNKNOWN key type to map_keys() and map_values() functions.

  • Add support for DECIMAL types to approx_distinct() aggregate function.

  • Add support for cast(double|real as varchar) to return scientific notation when magnitude of the input value is greater than or equal to 10^7, or less than 10^-3.

  • Fix find_first() to return NULL when the input ArrayVector is NULL but has non-zero offsets and sizes.

  • Fix find_first() to support input ArrayVectors that are only NULL or empty.

  • Fix find_first() to return NULL for inputs NULL array and 0 index.

  • Fix find_first() to throw an error for inputs empty array and invalid start index.

  • Fix array_sort() to fail gracefully if the specified comparator lambda is not supported.

  • Fix transform_keys() to check new keys for NULLs.

  • Fix set_union(), set_agg() to preserve the order of inputs.

  • Fix map() to produce the correct output if input arrays have NULL rows but with invalid offsets and sizes.

  • Fix accuracy of the DECIMAL type average computation. #7944

Spark Functions

Hive Connector

  • Add support for multiple S3 FileSystems. #7388

  • Add support to write dictionary and constant encoded vectors to Parquet by flattening them.

  • Add support to specify a schema when writing Parquet files. #6074

  • Add config max_split_preload_per_driver and remove the split_preload_per_driver flag.

  • Fix memory leak in HdfsBuilder.

Arrow

  • Fix exporting an REE array by setting the child name to the canonical name defined in the Arrow spec. #7802

Performance and Correctness

  • Add support for lambda functions to ExpressionFuzzer.

  • Add ExchangeFuzzer.

Build

  • Add support for docker image with Presto.

  • Add support for azure-storage-files-datalake version 12.8.0.

  • Allow specifying a custom curl version for the cpr library. #7853

  • Update aws-sdk-cpp version to 1.11.169 (from 1.10.57).

Credits

Aditi Pandit, Amit Dutta, Bikramjeet Vig, Chengcheng Jin, Christian Zentgraf, Daniel Munoz, Deepak Majeti, Ge Gao, Harvey Hunt, HolyLow, Hongze Zhang, Jacob Wujciak-Jens, Jia, Jia Ke, Jialiang Tan, Jimmy Lu, Jubin Chheda, Karteekmurthys, Ke, Kevin Wilfong, Krishna Pai, Krishna-Prasad-P-V, Laith Sakka, Ma-Jian1, Masha Basmanova, Orri Erling, PHILO-HE, Patrick Sullivan, Pedro Eugenio Rocha Pedreira, Pedro Pedreira, Pramod,Ravi Rahman, Richard Barnes, Sergey Pershin, Srikrishna Gopu, Wei He, Xiaoxuan Meng, Yangyang Gao, Yedidya Feldblum, Zac, aditi-pandit, binwei, duanmeng, hengjiang.ly, joey.ljy, rui-mo, shangjing.cxw, soumyaduriseti, xiaoxmeng, xiyu.zk, xumingming, yan ma, yangchuan ,yingsu00, zhli, zhli1142015, 高阳阳