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TiDB 2.1.7 Release Notes

Release Date: March 28, 2019

TiDB version: 2.1.7

TiDB Ansible version: 2.1.7

TiDB

  • Fix the issue of longer startup time when upgrading the program caused by canceling DDL operations #9768
  • Fix the issue that the check-mb4-value-in-utf8 configuration item is in the wrong position in the config.example.toml file #9852
  • Improve the compatibility of the str_to_date built-in function with MySQL #9817
  • Fix the compatibility issue of the last_day built-in function #9750
  • Add the tidb_table_id column for infoschema.tables to facilitate getting table_id by using SQL statements and add the tidb_indexes system table to manage the relationship between Table and Index #9862
  • Add a check about the null definition of Table Partition #9663
  • Change the privileges required by Truncate Table from Delete to Drop to make it consistent with MySQL #9876
  • Support using subqueries in the DO statement #9877
  • Fix the issue that the default_week_format variable does not take effect in the week function #9753
  • Support the plugin framework #9880, #9888
  • Support checking the enabling state of binlog by using the log_bin system variable #9634
  • Support checking the Pump/Drainer status by using SQL statements #9896
  • Fix the compatibility issue about checking mb4 character on utf8 when upgrading TiDB #9887
  • Fix the panic issue when the aggregate function calculates JSON data in some cases #9927

PD

  • Fix the issue that the transferring leader step cannot be created in the balance-region when the number of replicas is one #1462

Tools

  • Support replicating generated columns by using binlog

TiDB Ansible

Change the default retention time of Prometheus monitoring data to 30d

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