Remove MySQL::DatabaseStatements#select_one

The implementation from abstract/database_statements.rb seems to work just fine.
And with ActiveRecord::Result now implementing an optimized #first method, the
performance concerns previously addressed in
https://github.com/rails/rails/commit/bf79aa4fc14aeb2646331e767038acf0b77e9e7f
should not be an issue.

1 files changed, 0 insertions, 13 deletions

diff --git a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
index 13c9b6cbd9..87f0ff7d85 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql/database_statements.rb
@@ -13,19 +13,6 @@ module ActiveRecord
           result
         end
 
-        # Returns a record hash with the column names as keys and column values
-        # as values.
-        def select_one(arel, name = nil, binds = [])
-          arel, binds = binds_from_relation(arel, binds)
-          @connection.query_options.merge!(as: :hash)
-          select_result(to_sql(arel, binds), name, binds) do |result|
-            @connection.next_result while @connection.more_results?
-            result.first
-          end
-        ensure
-          @connection.query_options.merge!(as: :array)
-        end
-
         # Returns an array of arrays containing the field values.
         # Order is the same as that returned by +columns+.
         def select_rows(sql, name = nil, binds = [])