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# Release 463 (23 Oct 2024) | ||
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## General | ||
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* Add {func}`timezone` functions to extract the timezone identifier from a | ||
timestamp or time. ({issue}`20893`) | ||
* Add table functions to the `SHOW FUNCTIONS` output. ({issue}`12550`) | ||
* Disallow the window framing clause for {func}`ntile`, {func}`rank`, | ||
{func}`dense_rank`, {func}`percent_rank`, {func}`cume_dist`, and | ||
{func}`row_number`. ({issue}`23742`) | ||
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## ClickHouse connector | ||
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* Improve performance for queries with `IS NULL` expressions. ({issue}`23459`) | ||
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## Delta Lake connector | ||
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* Add support for writing change data feed when [deletion vector](https://docs.delta.io/latest/delta-deletion-vectors.html) | ||
is enabled. ({issue}`23620`) | ||
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## Iceberg connector | ||
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* Add support for nested namespaces with the REST catalog. ({issue}`22916`) | ||
* Add support for configuring the maximum number of rows per row-group in the | ||
ORC writer with a session property. ({issue}`23722`) | ||
* Clean up position delete files when `OPTIMIZE` is run on a subset of the | ||
table's partitions. ({issue}`23801`) |