diff options
| -rw-r--r-- | activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb | 26 |
1 files changed, 13 insertions, 13 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb index f4f52e85e3..e103508a13 100644 --- a/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb +++ b/activerecord/lib/active_record/connection_adapters/abstract_mysql_adapter.rb @@ -830,19 +830,6 @@ module ActiveRecord MysqlTypeMetadata.new(super(sql_type), collation: collation, extra: extra, strict: strict_mode?) end - # MySQL is too stupid to create a temporary table for use subquery, so we have - # to give it some prompting in the form of a subsubquery. Ugh! - def subquery_for(key, select) - subsubselect = select.clone - subsubselect.projections = [key] - - subselect = Arel::SelectManager.new(select.engine) - subselect.project Arel.sql(key.name) - # Materialized subquery by adding distinct - # to work with MySQL 5.7.6 which sets optimizer_switch='derived_merge=on' - subselect.from subsubselect.distinct.as('__active_record_temp') - end - def add_index_length(option_strings, column_names, options = {}) if options.is_a?(Hash) && length = options[:length] case length @@ -943,6 +930,19 @@ module ActiveRecord private + # MySQL is too stupid to create a temporary table for use subquery, so we have + # to give it some prompting in the form of a subsubquery. Ugh! + def subquery_for(key, select) + subsubselect = select.clone + subsubselect.projections = [key] + + subselect = Arel::SelectManager.new(select.engine) + subselect.project Arel.sql(key.name) + # Materialized subquery by adding distinct + # to work with MySQL 5.7.6 which sets optimizer_switch='derived_merge=on' + subselect.from subsubselect.distinct.as('__active_record_temp') + end + def version @version ||= full_version.scan(/^(\d+)\.(\d+)\.(\d+)/).flatten.map(&:to_i) end |