Query wrapper for query having name and raw query Name can be used for logging, for example.

Client for working with DB.

DB interface for working with DB.

NamedExecer interface for working with named queries.

Pinger interface for checking connection to DB.

QueryExecer interface for working with usual queries.

SQLExecer combines NamedExecer and QueryExecer.

Transactor interface for working with transactions.

TxManager a transaction manager that executes a user-specified handler in a transaction.

Handler - handler for transaction.