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-rw-r--r--activerecord/lib/active_record/connection_adapters/abstract_adapter.rb10
1 files changed, 6 insertions, 4 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
index cf6a1217a0..c2087b8216 100644
--- a/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/abstract_adapter.rb
@@ -120,6 +120,7 @@ module ActiveRecord
@quoted_column_names, @quoted_table_names = {}, {}
@prevent_writes = false
@visitor = arel_visitor
+ @statements = build_statement_pool
@lock = ActiveSupport::Concurrency::LoadInterlockAwareMonitor.new
if self.class.type_cast_config_to_boolean(config.fetch(:prepared_statements) { true })
@@ -492,11 +493,9 @@ module ActiveRecord
# this should be overridden by concrete adapters
end
- ###
- # Clear any caching the database adapter may be doing, for example
- # clearing the prepared statement cache. This is database specific.
+ # Clear any caching the database adapter may be doing.
def clear_cache!
- # this should be overridden by concrete adapters
+ @lock.synchronize { @statements.clear } if @statements
end
# Returns true if its required to reload the connection between requests for development mode.
@@ -718,6 +717,9 @@ module ActiveRecord
def arel_visitor
Arel::Visitors::ToSql.new(self)
end
+
+ def build_statement_pool
+ end
end
end
end