| title | toc | summary |
|---|---|---|
What's New in beta-20160505 |
false |
Additions and changes in CockroachDB version beta-20160505. |
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- New SQL command
UPSERTis available. This is syntactically similar toINSERTbut will update the row with the supplied columns if there is a conflicting row for the primary key. #6456 - The SQL type system has been overhauled, reducing the number of explicit casts required. RFC
- Tuples are now considered for index selection, so
SELECT * FROM t WHERE (a, b) > ($1, $2)can use an index defined on(a, b). #6332
- Bulk inserts to previously-empty table spans are now faster. #6375, #6414
- Ranges that have grown above the target size are now split before being rebalanced, reducing memory usage. #6447
- Reduced rapid memory growth during partitions. #6448
ALTER TABLEnow performs backfill operations in chunks. #6056DROP TABLEnow uses the schema change mechanism intead of synchronously deleting all data. #6336- Scanning over records that have only one MVCC version is faster. #6351
- The command queue now uses coarse-grained spans until a conflict has occurred. #6412
- When a replica is rebalanced from one node to another, the old node no longer triggers unnecessary Raft elections. #6423
- Servers now attempt to drain more gracefully when restarted. #6313
- Metrics on lease requests are now available internally. #5596
- The RocksDB cache will no longer use all available memory if
cgroupsreports a limit higher than physical memory. #6379
- The range descriptor cache is now invalidated correctly, fixing a bug in which requests could be retried repeatedly on the wrong node. #6425
- Fixed a bug with some queries using aggregate functions like
MIN()andMAX(). #6380 - Tuple comparisons now work correctly when one tuple contains
NULL. #6370
- Users can now click Chat with Developers in the lower right corner of any docs page to access the public CockroachDB Gitter channel without leaving the site. #248
- Community-supported docs and configuration files for running CockroachDB inside a single VirtualBox virtual machine. #263
- Docs on using environment variables as default values for command-line flags. #235
- Docs on using the
versionandnodecommands.
This release includes 66 merged PRs by 18 authors. We would like to thank the following contributors from the CockroachDB community, especially first-time contributor Paul Steffensen.
- Bogdan Batog
- il9ue
- Kenji Kaneda
- Paul Steffensen