AR: extracts StringPool::EMPTY
AR: extracts StringPool::SCHEMA
AR: extracts StringPool::SQL
AR: extracts StringPool::ID
AR: extracts StringPool::COMMA
AR: extracts StringPool::DOT
AR: extracts StringPool::UNDERSCORE
AR: extracts StringPool::NULL
AD: extracts StringPool::EMPTY
AD: extracts StringPool::SLASH
AD: extracts StringPool::PATH_INFO