grafana's $__to and $__from are not supported in alerts

[vbichov]

What happened:

I tried using grafana's $__from and $__to variables

in alert condition but got the following exception when testing alert condition:

request handler response error {error querying the database: code: 62, message: Syntax error: failed at position 861 ('$') (line 27, col 68): ${__from} / 1000))) and t < toStartOfMinute(toDateTime(toInt32(${__to} / 1000)))
    -- where t + interval 1 hour > (toDateTime(toInt32(${__from} / 1000))) and . Expected one of: ALL, DISTINCT, token, Comma, ClosingRoundBracket, CAST operator, NOT, INTERVAL, CASE, DATE, TIMESTAMP, tuple, collection of literals, array, number, literal, NULL, NULL, Bool, TRUE, FALSE, string literal, asterisk, qualified asterisk, compound identifier, list of elements, identifier, COLUMNS matcher, COLUMNS, qualified COLUMNS matcher, substitution, MySQL-style global variable  A <nil> [] [] 0xc003e27170}"

What you expected to happen:

alert evaluation should have been successful

How to reproduce it (as minimally and precisely as possible):

1. run grafana 10.3.3 with legacy alerting enabled

2. create a graph pannel with query that uses $__from an $__to in it:

select $__timeInterval(date_created) as t, count() from your_table
where date_created < toDateTime(${__to} / 1000) and date_created > toDateTime(${__from} / 1000)
group by t
order by t

3. make sure the graph works

4. go to legacy alerts page - try to press Test rule

Screenshots

Environment:

• Grafana version: 10.3.3
• Plugin version: 4.2.0
• OS Grafana is installed on: linux
• User OS & Browser: chrome
• Others:

[SpencerTorres]

Have you tried different syntax for accessing these variables? It seems like it's not replacing the ${xxx} syntax. Either that or the variable isn't defined in alerts mode. Do these variables work with other datasources? Can you show the HTTP request payload? Usually the request itself will define the time range, so we can see whether it's included or not.

Usually I see these written as $__from and $__to. You could also try one of the macros which can replace the time for you.

[bossinc]

@vbichov I am closing this issue. Please reopen if you still need help. 🙂