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tidb v2.1.9 Release Notes

Release Date: 2019-05-06 // almost 5 years ago
    • 🛠 Fix compatibility of the MAKETIME function when unsigned type overflows #10089
    • 🛠 Fix the stack overflow caused by constant folding in some cases #10189
    • 🛠 Fix the privilege check issue for Update when an alias exists in some cases #10157, #10326
    • Track and control memory usage in DistSQL #10197
    • Support specifying collation as utf8mb4_0900_ai_ci #10201
    • 🛠 Fix the wrong result issue of the MAX function when the primary key is of the Unsigned type #10209
    • 🛠 Fix the issue that NULL values can be inserted into NOT NULL columns in the non-strict SQL mode #10254
    • 🛠 Fix the wrong result issue of the COUNT function when multiple columns exist in DISTINCT #10270
    • 🛠 Fix the panic issue occurred when LOAD DATA parses irregular CSV files #10269
    • Ignore the overflow error when the outer and inner join key types are inconsistent in Index Lookup Join #10244
    • 🛠 Fix the issue that a statement is wrongly judged as point-get in some cases #10299
    • 🛠 Fix the wrong result issue when the time type does not convert the time zone in some cases #10345
    • 🛠 Fix the issue that TiDB character set cases are inconsistent in some cases #10354
    • 👌 Support controlling the number of rows returned by operator #9166
      • Selection & Projection #10110
      • StreamAgg & HashAgg #10133
      • TableReader & IndexReader & IndexLookup #10169
    • 👌 Improve the slow query log:
      • Add SQL Digest to distinguish similar SQL #10093
      • Add version information of statistics used by slow query statements #10220
      • Show memory consumption of a statement in slow query log #10246
      • Adjust the output format of Coprocessor related information so it can be parsed by pt-query-digest #10300
      • Fix the # character issue in slow query statements #10275
      • Add some information columns to the memory table of slow query statements #10317
      • Add the transaction commit time to slow query log #10310
      • Fix the issue some time formats cannot be parsed by pt-query-digest #10323