func (m *Monitor) collectError(err error) bool {
switch {
case mysql.MySQLErrorCode(err) == mysql.ER_SPECIFIC_ACCESS_DENIED_ERROR:
m.logger.Error(fmt.Sprintf("Cannot collect InnoDB stats: %s", err))
return true
default:
m.logger.Warn(err)
return false
}
}
func (e *QueryExecutor) Explain(db, query string) (*proto.ExplainResult, error) {
explain, err := e.explain(db, query)
if err != nil {
// MySQL 5.5 will return Syntax error because it doesn't support
// explains on DML queries
// MySQL 5.6.3+ supports explains on DML queries, but it requieres
// additional privileges
if mysql.MySQLErrorCode(err) == mysql.ER_SYNTAX_ERROR ||
mysql.MySQLErrorCode(err) == mysql.ER_USER_DENIED {
if IsDMLQuery(query) {
query = DMLToSelect(query)
if query == "" {
return nil, fmt.Errorf("Cannot convert non-SELECT query")
}
explain, err = e.explain(db, query)
}
}
if err != nil {
return nil, fmt.Errorf("EXPLAIN failed: %s", err)
}
}
return explain, nil
}
func (m *Monitor) collectError(err error) error {
switch {
case mysql.MySQLErrorCode(err) == mysql.ER_SPECIFIC_ACCESS_DENIED_ERROR:
m.logger.Error(fmt.Sprintf("Cannot collect InnoDB stats: %s", err))
return accessDenied
}
switch err.(type) {
case *net.OpError:
m.logger.Warn("Lost connection to MySQL:", err)
m.status.Update(m.name+"-mysql", fmt.Sprintf("Disconnected (%s)", err))
return networkError
}
m.logger.Warn(err)
return err
}