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[SPARK-18245] Improving support for bucketed table - Spark - [issue]
...This is an umbrella ticket for improving various execution planning for bucketed tables....    Author: Reynold Xin , 2019-10-08, 05:42
[SPARK-15691] Refactor and improve Hive support - Spark - [issue]
...Hive support is important to Spark SQL, as many Spark users use it to read from Hive. The current architecture is very difficult to maintain, and this ticket tracks progress towards getting ...    Author: Reynold Xin , 2019-10-08, 05:42
[SPARK-15777] Catalog federation - Spark - [issue]
...This is a ticket to track progress to support federating multiple external catalogs. This would require establishing an API (similar to the current ExternalCatalog API) for getting informati...    Author: Reynold Xin , 2019-10-08, 05:42
[SPARK-20283] Add preOptimizationBatches - Spark - [issue]
...We currently have postHocOptimizationBatches, but not preOptimizationBatches. This patch adds preOptimizationBatches so the optimizer debugging extensions are symmetric....    Author: Reynold Xin , 2019-09-03, 08:52
[SPARK-3137] Use finer grained locking in TorrentBroadcast.readObject - Spark - [issue]
...TorrentBroadcast.readObject uses a global lock so only one task can be fetching the blocks at the same time.This is not optimal if we are running multiple stages concurrently because they sh...    Author: Reynold Xin , 2019-09-03, 21:13
[SPARK-16390] Dataset API improvements - Spark - [issue]
...This is an umbrella ticket for improving the user experience of Dataset API....    Author: Reynold Xin , 2019-09-09, 16:30
[SPARK-16275] Implement all the Hive fallback functions - Spark - [issue]
...As of Spark 2.0, Spark falls back to Hive for only the following built-in functions:    "elt", "hash", "java_method", "histogram_numeric",    "map_keys", "map_values",&nb...    Author: Reynold Xin , 2019-09-09, 16:30
[SPARK-16452] basic INFORMATION_SCHEMA support - Spark - [issue]
...INFORMATION_SCHEMA is part of SQL92 support. This ticket proposes adding a few tables as defined in SQL92 standard to Spark SQL....    Author: Reynold Xin , 2020-01-29, 20:22
[SPARK-26223] Scan: track metastore operation time - Spark - [issue]
...The Scan node should report how much time it spent in metastore operations. Similar to file listing, would be great to also report start and end time for constructing a timeline. ...    Author: Reynold Xin , 2020-02-22, 00:12
[SPARK-6235] Address various 2G limits - Spark - [issue]
...An umbrella ticket to track the various 2G limit we have in Spark, due to the use of byte arrays and ByteBuffers....    Author: Reynold Xin , 2020-01-16, 20:00