TQL

The TQL keyword executes TQL language in SQL. The TQL is Time-Series Query Language, which is an extension for Prometheus's PromQL in GreptimeDB.

EVAL

sql

TQL [EVAL | EVALUATE] (start, end, step) expr

The start, end and step are the query parameters just like Prometheus Query API:

start: <rfc3339 | unix_timestamp>: Start timestamp, inclusive.
end: <rfc3339 | unix_timestamp>: End timestamp, inclusive.
step: <duration | float>: Query resolution step width in duration format or float number of seconds.

The expr is the TQL expression query string.

Return the per-second rate for all time series with the http_requests_total metric name, as measured over the last 5 minutes:

sql

TQL eval (1677057993, 1677058993, '1m') rate(prometheus_http_requests_total{job="prometheus"}[5m]);

text

TODO

TODO