MYSQL RENAME COLUMN SERIES
If a value is selected, the Metric column field will be used as the series name. Selecting a value for the Metric column field is optional. The Time column field refers to the name of the column holding your time values. To select a table or view in another database that your database user has access to you can manually enter a fully qualified name (database.table) like trics. In the FROM field, Grafana will suggest tables that are in the configured database. When you enter edit mode for the first time or add a new query Grafana will try to prefill the query builder with the first table that has a timestamp column and a numeric column. Select table, time column and metric column (FROM) Click on it and it will expand and show the raw interpolated SQL string that was executed. The query editor has a link named Generated SQL that shows up after a query has been executed, while in panel edit mode. You find the MySQL query editor in the metrics tab in a panel’s edit mode. You can use wildcards ( *) in place of database or table if you want to grant access to more databases and tables. GRANT SELECT ON mydatabase.mytable TO 'grafanaReader'
To protect against this we Highly recommend you create a specific mysql user with restricted permissions.Įxample: CREATE USER 'grafanaReader' IDENTIFIED BY 'password' For example, statements like USE otherdb and DROP TABLE user would beĮxecuted. The queryĬould include any SQL statement. Grafana does not validate that the query is safe. The specified database and tables you want to query. The database user you specify when you add the data source should only be granted SELECT permissions on The following time identifiers are supported: Identifier Number followed by a valid time identifier, e.g. It’s important to note that this value needs to be formatted as a This option can also be overridden/configured in a dashboard panel under data source options. Recommended to be set to write frequency, for example 1m if your data is written every minute. This should always be lower than configured wait_timeout in MySQL (Grafana v5.4+).Ī lower limit for the $_interval and $_interval_ms variables. The maximum amount of time in seconds a connection may be reused, default 14400/4 hours. The maximum number of connections in the idle connection pool, default 2 (Grafana v5.4+). The maximum number of open connections to the database, default unlimited (Grafana v5.4+). For more information, refer to the MySQL documentation.
If you leave this field empty, then the time zone is not updated. Set the value used in the session with SET time_zone='.'. This is necessary, if the timezone of the database (or the host of the database) is set to something other than UTC. Specify the time zone used in the database session, such as Europe/Berlin or +02:00. The IP address/hostname and optional port of your MySQL instance. This is how you refer to the data source in panels and queries.ĭefault data source means that it will be pre-selected for new panels. Click the + Add data source button in the top header.In the side menu under the Dashboards link you should find a link named Data Sources.Open the side menu by clicking the Grafana icon in the top header.Grafana ships with a built-in MySQL data source plugin that allows you to query and visualize data from a MySQL compatible database. Usage of time_sec will eventually be deprecated. Notice that this method allowed us to quickly remove the ‘$’ from each column name.Starting from Grafana v5.1 you can name the time column time in addition to earlier supported time_sec. #rename $ with blank in every column nameĭf.
You can use one of the following three methods to rename columns in a pandas DataFrame:
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