Close close all established db connections.

Connect to mysql db based on id, and returns error if id is not exists / not valid.

FromNullBool check if parameter is a valid boolean if null return false.

FromNullFloat check if parameter is a valid float64 if null return 0.00.

FromNullInt check if parameter is a valid int64 if null return 0.

FromNullString return a string if valid and empty string if not valid.

FromNullTime check if parameter is a valid time return a pointer time.

Log request with defaultLogger.

LogFormatter : log formatter.

NowFunc : time func.

Logger default logger.

Options for connection.

SQLConn is safe to use concurrently.

Tx struct.

LogWriter log writer interface.