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Fixed #29895 -- Doc'd why MySQL's atomic DDL statements don't work for atomic migrations.

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Rodrigo 2018-12-03 21:37:28 -05:00 committed by Tim Graham
parent f9a33e3c3f
commit ad191d9e01
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docs/howto/writing-migrations.txt
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@ -221,7 +221,10 @@ smaller batches::
] ]
The ``atomic`` attribute doesn't have an effect on databases that don't support The ``atomic`` attribute doesn't have an effect on databases that don't support
DDL transactions (e.g. MySQL, Oracle). DDL transactions (e.g. MySQL, Oracle). (MySQL's `atomic DDL statement support
<https://dev.mysql.com/doc/refman/en/atomic-ddl.html>`_ refers to individual
statements rather than multiple statements wrapped in a transaction that can be
rolled back.)
Controlling the order of migrations Controlling the order of migrations
=================================== ===================================