Cache full MySQL version in schema cache

  * The database version is cached in all the adapters, but this didn't include
    the full MySQL version. Anything that uses the full MySQL version would need
    to query the database to get that data even if they're using the schema
    cache.
  * Now the full MySQL version will be cached in the schema cache via the
    Version object.

1 files changed, 4 insertions, 0 deletions

diff --git a/activerecord/test/cases/connection_adapters/schema_cache_test.rb b/activerecord/test/cases/connection_adapters/schema_cache_test.rb
index 89a9c30f9b..28e232b88f 100644
--- a/activerecord/test/cases/connection_adapters/schema_cache_test.rb
+++ b/activerecord/test/cases/connection_adapters/schema_cache_test.rb
@@ -95,6 +95,10 @@ module ActiveRecord
 
         assert_no_queries do
           assert_equal @database_version.to_s, @cache.database_version.to_s
+
+          if current_adapter?(:Mysql2Adapter)
+            assert_not_nil @cache.database_version.full_version_string
+          end
         end
       end