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# Release 422 (12 Jul 2023) | ||
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## General | ||
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* Add support for adding nested fields with an `ADD COLUMN` statement. ({issue}`16248`) | ||
* Improve performance of `INSERT` and `CREATE TABLE AS ... SELECT` queries. ({issue}`18005`) | ||
* Prevent queries from hanging when worker nodes fail and the | ||
`task.retry-policy` configuration property is set to `TASK`. ({issue}`18175 `) | ||
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## Security | ||
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* Add support for validating JWT types with OAuth 2.0 authentication. ({issue}`17640`) | ||
* Fix error when the `http-server.authentication.type` configuration property | ||
is set to `oauth2` or `jwt` and the `principal-field` property's value | ||
differs. ({issue}`18210`) | ||
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## BigQuery connector | ||
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* Add support for writing to columns with a `timestamp(p) with time zone` type. ({issue}`17793`) | ||
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## Delta Lake connector | ||
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* Add support for renaming columns. ({issue}`15821`) | ||
* Improve performance of reading from tables with a large number of | ||
[checkpoints](https://docs.delta.io/latest/delta-batch.html#-data-retention). ({issue}`17405`) | ||
* Disallow using the `vacuum` procedure when the max | ||
[writer version](https://docs.delta.io/latest/versioning.html#features-by-protocol-version) | ||
is above 5. ({issue}`18095`) | ||
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## Hive connector | ||
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* Add support for reading the `timestamp with local time zone` Hive type. ({issue}`1240`) | ||
* Add a native Avro file format writer. This can be disabled with the | ||
`avro.native-writer.enabled` configuration property or the | ||
`avro_native_writer_enabled` session property. ({issue}`18064`) | ||
* Fix query failure when the `hive.recursive-directories` configuration property | ||
is set to true and partition names contain non-alphanumeric characters. ({issue}`18167`) | ||
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## Iceberg connector | ||
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* Add support for adding nested fields with an `ADD COLUMN` statement. ({issue}`16248`) | ||
* Change the default file format to Parquet. The `iceberg.file-format` | ||
catalog configuration property can be used to specify a different default file | ||
format. ({issue}`18170`) | ||
* Improve performance of reading `row` types from Parquet files. ({issue}`17387`) | ||
* Fix failure when writing to tables sorted on `UUID` or `TIME` types. ({issue}`18136`) | ||
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## Redshift connector | ||
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* Prevent returning incorrect results by throwing an error when encountering | ||
unsupported types. Previously, the query would fall back to the legacy type | ||
mapping. ({issue}`18209`) |