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add fillmode "last" to sql datasource

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This adds a new fill mode last (last observation carried forward) for grafana
to the sql datasources. This fill mode will fill in the last seen value in a
series when a timepoint is missing or NULL if no value for that series has
been seen yet.
This commit is contained in:
Sven Klemm
2018-07-30 11:04:04 +02:00
parent 72af8a7044
commit bfc66a7ed0
13 changed files with 136 additions and 20 deletions
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4
public/app/plugins/datasource/postgres/partials/query.editor.html
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@ -53,7 +53,9 @@ Macros:
- $__timeEpoch -> extract(epoch from column) as "time"
- $__timeFilter(column) -> column BETWEEN '2017-04-21T05:01:17Z' AND '2017-04-21T05:01:17Z'
- $__unixEpochFilter(column) -> column >= 1492750877 AND column <= 1492750877
- $__timeGroup(column,'5m') -> (extract(epoch from column)/300)::bigint*300
- $__timeGroup(column,'5m'[, fillvalue]) -> (extract(epoch from column)/300)::bigint*300
by setting fillvalue grafana will fill in missing values according to the interval
fillvalue can be either a literal value, NULL or last; last will fill in the last seen value or NULL if none has been seen yet
- $__timeGroupAlias(column,'5m') -> (extract(epoch from column)/300)::bigint*300 AS "time"
Example of group by and order by with $__timeGroup: