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Change release notes based on feedback

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Borys Belinsky
2018-07-05 14:55:51 +03:00
parent 66277e6304
commit 51b9c91a98
1 changed files with 3 additions and 5 deletions
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docs/release_notes.rst
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@@ -20,16 +20,14 @@ Fixed bugs
Breaking changes:
Starting with this version, the queries checksum in ``pt-query-digest`` will
use the full MD5 field as a CHAR(32) field instead of storing just the least
store the full MD5 field as a CHAR(32) field instead of storing just the least
significant bytes of the checksum as a BIGINT field. The reason for this
change is that storing only the least significant bytes as a BIGINT was
producing inconsistent results in MySQL 8 compared to MySQL 5.6+. For example,
the same query on MySQL 5.6+ would produce a checksum different from that
received in MySQL 8; this could cause the validation to fail.
producing inconsistent results in MySQL 8 compared to MySQL 5.6+.
``pt-online-schema-change`` in MySQL 8:
Due to an `error in MySQL 8.0+ <https://bugs.mysql.com/bug.php?id=89441>`_, it
Due to a `bug in MySQL 8.0+ <https://bugs.mysql.com/bug.php?id=89441>`_, it
is not possible to use the ``drop_swap`` method to rebuild constraints because
renaming a table will result in losing the foreign keys. You must specify a
different method explicitly.