What's New in v2.0.3

June 18, 2018

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General Changes

• The new compactor.threshold_bytes and max_record_age cluster settings can be used to configure the compactor. #25458
• The new cluster.preserve_downgrade_option cluster setting makes it possible to preserve the option to downgrade after performing a rolling upgrade to v2.1. #25811

SQL Language Changes

• Prevented DROP TABLE from using too much CPU. #25852

Command-Line Changes

• The cockroach sql command no longer prompts for a password when a certificate is provided. #26232
• The cockroach quit command now prints warning messages to the standard error stream, not to standard output. #26163

Bug Fixes

• Prevented the internal gossip network from being partitioned by making it much less likely that nodes in the network could forget about each other. #25521
• Prevented spurious BudgetExceededErrors for some queries that read a lot of JSON data from disk. #25719
• Fixed a crash in some cases when using a GROUP BY with HAVING. #25654
• Fixed a crash caused by inserting data into a table with computed columns that reference other columns that weren't present in the INSERT statement. #25807
• UPSERT is now properly able to write NULL values to every column in tables containing more than one column family. #26181
• Fixed a bug where a long-running query running from one day to the next would not always produce the right value for current_date(). #26413
• Fixed a bug where cockroach quit would erroneously fail even though the node already successfully shut down. #26163
• Rows larger than 8192 bytes are now supported by the "copy from" protocol. #26641
• Trying to "copy from stdin" into a table that doesn't exist no longer drops the connection. #26641
• Previously, expired compactions could stay in the queue forever. Now, they are removed when they expire. #26659

Performance Improvements

• The performance impact of dropping a large table has been substantially reduced. #26615

Doc Updates

• Documented special syntax forms of built-in SQL functions and conditional and function-like operators, and updated the SQL operator order of precedence. #3192
• Added best practices on understanding and avoiding transaction contention and a related FAQ. #3156
• Improved the documentation of AS OF SYSTEM TIME. #3155
• Expanded the manual deployment guides to cover running a sample workload against a cluster. #3149
• Added FAQs on generating unique, slowly increasing sequential numbers and the differences between UUID, sequences, and unique_rowid(). #3104

Contributors

This release includes 19 merged PRs by 14 authors.