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sync documentation, add remark about to_timestamp and redshift (#9841)

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Sven Klemm 2017-11-14 11:33:55 +01:00 committed by Daniel Lee
parent b1a6c7814d
commit 108f582ec4
3 changed files with 5 additions and 4 deletions
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4
docs/sources/features/datasources/postgres.md
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@ -45,10 +45,10 @@ Macro example | Description
------------ | -------------
*$__time(dateColumn)* | Will be replaced by an expression to rename the column to `time`. For example, *dateColumn as time*
*$__timeSec(dateColumn)* | Will be replaced by an expression to rename the column to `time` and converting the value to unix timestamp. For example, *extract(epoch from dateColumn) as time*
*$__timeFilter(dateColumn)* | Will be replaced by a time range filter using the specified column name. For example, *dateColumn > to_timestamp(1494410783) AND dateColumn < to_timestamp(1494497183)*
*$__timeFilter(dateColumn)* | Will be replaced by a time range filter using the specified column name. For example, *extract(epoch from dateColumn) BETWEEN 1494410783 AND 1494497183*
*$__timeFrom()* | Will be replaced by the start of the currently active time selection. For example, *to_timestamp(1494410783)*
*$__timeTo()* | Will be replaced by the end of the currently active time selection. For example, *to_timestamp(1494497183)*
*$__timeGroup(dateColumn,'5m')* | Will be replaced by an expression usable in GROUP BY clause. For example, *(extract(epoch from "dateColumn")/extract(epoch from '5m'::interval))::int*extract(epoch from '5m'::interval)*
*$__timeGroup(dateColumn,'5m')* | Will be replaced by an expression usable in GROUP BY clause. For example, *(extract(epoch from "dateColumn")/300)::bigint*300*
*$__unixEpochFilter(dateColumn)* | Will be replaced by a time range filter using the specified column name with times represented as unix timestamp. For example, *dateColumn > 1494410783 AND dateColumn < 1494497183*
*$__unixEpochFrom()* | Will be replaced by the start of the currently active time selection as unix timestamp. For example, *1494410783*
*$__unixEpochTo()* | Will be replaced by the end of the currently active time selection as unix timestamp. For example, *1494497183*

1
pkg/tsdb/postgres/macros.go
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@ -72,6 +72,7 @@ func (m *PostgresMacroEngine) evaluateMacro(name string, args []string) (string,
}
return fmt.Sprintf("extract(epoch from %s) as \"time\"", args[0]), nil
case "__timeFilter":
// dont use to_timestamp in this macro for redshift compatibility #9566
if len(args) == 0 {
return "", fmt.Errorf("missing time column argument for macro %v", name)
}

4
public/app/plugins/datasource/postgres/partials/query.editor.html
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@ -48,9 +48,9 @@ Table:
Macros:
- $__time(column) -&gt; column as "time"
- $__timeEpoch -&gt; extract(epoch from column) as "time"
- $__timeFilter(column) -&gt; column &ge; to_timestamp(1492750877) AND column &le; to_timestamp(1492750877)
- $__timeFilter(column) -&gt; extract(epoch from column) BETWEEN 1492750877 AND 1492750877
- $__unixEpochFilter(column) -&gt; column &gt; 1492750877 AND column &lt; 1492750877
- $__timeGroup(column,'5m') -&gt; (extract(epoch from "dateColumn")/extract(epoch from '5m'::interval))::int
- $__timeGroup(column,'5m') -&gt; (extract(epoch from "dateColumn")/300)::bigint*300
Example of group by and order by with $__timeGroup:
SELECT