Mysql Stmt ActiveRecord ConnectionAdapters MysqlAdapter StatementPool class StatementPool Ruby on Rails 4.0.13 Since v3.1.12 Last seen in v4.2.9 Available in: v3.1.12 v3.2.22.5 v4.0.13 v4.1.16 v4.2.9 Compare with: … v3.1.12 v3.2.22.5 v4.1.16 v4.2.9 No documentation comment. Inherits from Mysql::Stmt::ActiveRecord::ConnectionAdapters::StatementPool Methods (defined here) # [] # []= # clear # delete # each # key? # length self. new Private methods (1) Implementation detail — not part of the public API. # cache