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Add Trino 412 release notes
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colebow authored and martint committed Apr 5, 2023
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.. toctree::
:maxdepth: 1

release/release-412
release/release-411
release/release-410
release/release-409
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85 changes: 85 additions & 0 deletions docs/src/main/sphinx/release/release-412.md
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# Release 412 (5 Apr 2023)

## General

* Add support for aggregate functions and parameters as arguments for the
[`json_object()`](json_object) and [`json_array()`](json_array)
functions. ({issue}`16489`, {issue}`16523`, {issue}`16525`)
* Expose optimizer rule execution statistics in query statistics. The number of
rules for which statistics are collected can be limited with the
`query.reported-rule-stats-limit` configuration property. ({issue}`2578`)
* Add the {func}`exclude_columns` table function. ({issue}`16584`)
* Allow disabling the use of the cost-based optimizer to determine partitioning
of a stage with the `optimizer.use-cost-based-partitioning`configuration
property or the `use_cost_based_partitioning` session property. ({issue}`16781`)
* Improve performance of queries involving table functions with table arguments. ({issue}`16012`)
* Improve latency for small queries when fault-tolerant execution is enabled. ({issue}`16103`)
* Fix failure when querying a nested field of a `row` type in queries involving
`ORDER BY ... LIMIT`. ({issue}`16768`)

## JDBC driver

* Allow configuring a custom DNS resolver. ({issue}`16647`)

## ClickHouse connector

* Improve performance of queries involving `sum(DISTINCT ...)` by pushing
computation down to ClickHouse. ({issue}`16452`)

## Delta Lake connector

* Add support for arithmetic binary expressions in table check constraints. ({issue}`16721`)
* Improve performance of queries that only read partition columns. ({issue}`16788`)

## Hive connector

* Fix query failure when bucketing or sorting column names are registered in
a metastore in uppercase. ({issue}`16796`)
* Fix query failure when reading transactional tables with locations containing
hidden directories. ({issue}`16773`)

## Iceberg connector

* Fix incorrect results for the `migrate` procedure when the table location
contains a hidden directory. ({issue}`16779`)

## Ignite connector

* Add support for `ALTER TABLE ... ADD COLUMN`. ({issue}`16755`)
* Improve performance of queries involving `sum(DISTINCT ...)` by pushing
computation to Ignite. ({issue}`16452`)

## MariaDB connector

* Improve performance of queries involving `sum(DISTINCT ...)` by pushing
computation down to MariaDB. ({issue}`16452`)

## MySQL connector

* Improve performance of queries involving `sum(DISTINCT ...)` by pushing
computation down to MySQL. ({issue}`16452`)

## Oracle connector

* Improve performance of queries involving `sum(DISTINCT ...)` by pushing
computation down to Oracle. ({issue}`16452`)

## PostgreSQL connector

* Add support for [table comments](/sql/comment). ({issue}`16135`)
* Improve performance of queries involving `sum(DISTINCT ...)` by pushing
computation down to PostgreSQL. ({issue}`16452`)

## Redshift connector

* Improve performance of queries involving `sum(DISTINCT ...)` by pushing
computation down to Redshift. ({issue}`16452`)

## SQL Server connector

* Improve performance of queries involving `sum(DISTINCT ...)` by pushing
computation down to SQL Server. ({issue}`16452`)

## SPI

* Allow table functions to return anonymous columns. ({issue}`16584`)

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