v1.2.8 Release Notes

Released May 8, 2019.

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File Format Change

There are two ways to address the above note.

• If you don't care about preserving your existing data, then delete your existing cluster, and create a new cluster with 1.2.8.
• If you want to continue using your existing data, then please save your data (in the form of SQL statements), delete the cluster, create a new cluster with 1.2.8 and then load the previously saved data.

YSQL Changes

• Suport UNIQUE constraint. #1022
• ON CONFLICT support. [#1109] (https://github.com/yugabyte/yugabyte-db/issues/1109)
• Scan path cleanup
• Create information_schema during initdb.#1251
• Storing YSQL Metrics and setting up webserver for YSQL. #1137
• Fix compilation on Ubuntu 18.04. #1277
• PostgreSQL is built in non-parallel mode. #1235
• Postgres process failed to start on Ubuntu. #1292
• Cascade truncate indexes. #1175
• Rename psql to ysqlsh. #1257
• Add support for identity column. #1267
• Allow insert multiple NULL values in UNIQUE INDEX column. #1058

YCQL Changes

• Add EXPLAIN to YCQL for SELECT, INSERT, UPDATE, DELETE stmts. #861
• Fix YCQL paging handling in distributed transactions. #1281
• Support JSON operator on INSERT. #668

Bug Fixes

• Do not modify variable pre_allocated_size if fallocate() fails. #1211

System Improvements

• Unify yb-master and yb-tserver under one manager process
• CDC service proto definition. #1164
• Add port conflict error check to yugabyte-db
• Run initdb automatically from the master leader
• Timed out call should not take space in service queue. #1213
• Handle case when timeout is not specified in UpdateConsensus. #1265
• Speed Up Create Table. #911
• Avoid destroying Messenger and Reactor inside Reactor thread.#1279
• Fix Leader not yet replicated NoOp error. #1236
• Add libcds to thirdparty. #1220
• Separate Raft group and tablet abstractions - first step. #681
• Process callbacks for outbound calls in a thread pool.#1280
• Simplified yb-ctl output. #1360