1 files changed, 13 insertions, 23 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
index 6d8e994654..75f244b3f3 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
@@ -20,27 +20,20 @@ module ActiveRecord
       ConnectionAdapters::Mysql2Adapter.new(client, logger, options, config)
     rescue Mysql2::Error => error
       if error.message.include?("Unknown database")
-        raise ActiveRecord::NoDatabaseError.new(error.message)
+        raise ActiveRecord::NoDatabaseError.new(error.message, error)
       else
-        raise error
+        raise
       end
     end
   end
 
   module ConnectionAdapters
     class Mysql2Adapter < AbstractMysqlAdapter
-
-      class Column < AbstractMysqlAdapter::Column # :nodoc:
-        def adapter
-          Mysql2Adapter
-        end
-      end
-
-      ADAPTER_NAME = 'Mysql2'
+      ADAPTER_NAME = 'Mysql2'.freeze
 
       def initialize(connection, logger, connection_options, config)
         super
-        @visitor = BindSubstitution.new self
+        @prepared_statements = false
         configure_connection
       end
 
@@ -69,21 +62,21 @@ module ActiveRecord
         end
       end
 
-      def new_column(field, default, type, null, collation, extra = "") # :nodoc:
-        Column.new(field, default, type, null, collation, strict_mode?, extra)
-      end
-
       def error_number(exception)
         exception.error_number if exception.respond_to?(:error_number)
       end
 
+      #--
       # QUOTING ==================================================
+      #++
 
       def quote_string(string)
         @connection.escape(string)
       end
 
+      #--
       # CONNECTION MANAGEMENT ====================================
+      #++
 
       def active?
         return false unless @connection
@@ -107,7 +100,9 @@ module ActiveRecord
         end
       end
 
+      #--
       # DATABASE STATEMENTS ======================================
+      #++
 
       def explain(arel, binds = [])
         sql     = "EXPLAIN #{to_sql(arel, binds.dup)}"
@@ -213,7 +208,7 @@ module ActiveRecord
 
       # Returns an array of arrays containing the field values.
       # Order is the same as that returned by +columns+.
-      def select_rows(sql, name = nil)
+      def select_rows(sql, name = nil, binds = [])
         execute(sql, name).to_a
       end
 
@@ -235,11 +230,6 @@ module ActiveRecord
 
       alias exec_without_stmt exec_query
 
-      # Returns an ActiveRecord::Result instance.
-      def select(sql, name = nil, binds = [])
-        exec_query(sql, name)
-      end
-
       def insert_sql(sql, name = nil, pk = nil, id_value = nil, sequence_name = nil)
         super
         id_value || @connection.last_id
@@ -272,8 +262,8 @@ module ActiveRecord
         super
       end
 
-      def version
-        @version ||= @connection.info[:version].scan(/^(\d+)\.(\d+)\.(\d+)/).flatten.map { |v| v.to_i }
+      def full_version
+        @full_version ||= @connection.info[:version]
       end
 
       def set_field_encoding field_name