Support microsecond datetime precision on MariaDB 5.3+.

We support microsecond datetime precision for MySQL 5.6.4+. MariaDB has
supported it since 5.3.0, but even 10.x versions return a compatible
version string like `5.5.5-10.1.8-MariaDB-log` which we parse as 5.5.5,
before MySQL supported microsecond precision.

Specialize our version check to account for MariaDB to fix.

1 files changed, 0 insertions, 21 deletions

diff --git a/activerecord/test/cases/adapters/mysql2/quoting_test.rb b/activerecord/test/cases/adapters/mysql2/quoting_test.rb
deleted file mode 100644
index 2de7e1b526..0000000000
--- a/activerecord/test/cases/adapters/mysql2/quoting_test.rb
+++ /dev/null
@@ -1,21 +0,0 @@
-require "cases/helper"
-
-class Mysql2QuotingTest < ActiveRecord::Mysql2TestCase
-  setup do
-    @connection = ActiveRecord::Base.connection
-  end
-
-  test 'quoted date precision for gte 5.6.4' do
-    @connection.stubs(:full_version).returns('5.6.4')
-    @connection.remove_instance_variable(:@version) if @connection.instance_variable_defined?(:@version)
-    t = Time.now.change(usec: 1)
-    assert_match(/\.000001\z/, @connection.quoted_date(t))
-  end
-
-  test 'quoted date precision for lt 5.6.4' do
-    @connection.stubs(:full_version).returns('5.6.3')
-    @connection.remove_instance_variable(:@version) if @connection.instance_variable_defined?(:@version)
-    t = Time.now.change(usec: 1)
-    assert_no_match(/\.000001\z/, @connection.quoted_date(t))
-  end
-end