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29 lines
739 B
Go
29 lines
739 B
Go
package metricsql_test
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import (
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"fmt"
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"log"
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"github.com/VictoriaMetrics/VictoriaMetrics/lib/metricsql"
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)
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func ExampleExpandWithExprs() {
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// mql can contain arbitrary MetricsQL extensions - see https://github.com/VictoriaMetrics/VictoriaMetrics/wiki/ExtendedPromQL
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mql := `WITH (
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commonFilters = {job="$job", instance="$instance"},
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f(a, b) = 100*(a/b),
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)
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f(disk_free_bytes{commonFilters}, disk_total_bytes{commonFilters})`
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// Convert mql to PromQL
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pql, err := metricsql.ExpandWithExprs(mql)
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if err != nil {
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log.Fatalf("cannot expand with expressions: %s", err)
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}
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fmt.Printf("%s\n", pql)
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// Output:
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// 100 * (disk_free_bytes{job="$job", instance="$instance"} / disk_total_bytes{job="$job", instance="$instance"})
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}
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