December 2021 Update

Documentation

• Add Aggregation-related optimizations guide.

• Add missing documentation for json_extract_scalar() function.

• Add documentation for missing functions in Mathematical Functions and Comparison Functions.

• Update How to add an aggregate function? guide to reflect changes to the function registry.

• Update How to add a scalar function? guide to describe how to write functions with complex type inputs and results.

Core Library

• Add support for partition key aliases to Hive Connector.

• Add support for conversions between Velox string and Arrow string.

• Add StreamingAggregation operator.

• Fix a bug in HashJoin filter to enable TPC-H query 19.

Presto Functions

• Add corr(), covar_samp(), covar_pop(), every() aggregate functions.

• Add from_base(), array_position() functions.

• Add support for ‘timestamp with timezone’ in to_unixtime() function.

Credits

Aditi Pandit, Alex Hornby, Amit Dutta, Andres Suarez, Andrew Gallagher, Chao Chen, Cheng Su, Deepak Majeti, Huameng Jiang, Jack Qiao, Kevin Wilfong, Krishna Pai, Laith Sakka, Marc Fisher, Masha Basmanova, Michael Shang, Naresh Kumar, Orri Erling, Pedro Eugenio Rocha Pedreira, Sergey Pershin, Wei He, Wei Zheng, Xavier Deguillard, Yating Zhou, Yuan Chao Chou, Zhenyuan Zhao