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The instantaneous rate of change of the counter at the left (earlier) and right (later) side of the time range.

For more information about counter aggregation functions, see the hyperfunctions documentation.

The instantaneous rate of change of the counter at the left (earlier) side of
the time range. Essentially, the `idelta_left`

divided by the duration between the
first and second observed points in the CounterSummary. This can be especially
useful for fast moving counters.

```
irate_left(
summary CounterSummary
) RETURNS DOUBLE PRECISION
```

Name | Type | Description |
---|---|---|

summary | CounterSummary | The input CounterSummary from a counter_agg call |

Name | Type | Description |
---|---|---|

irate_left | DOUBLE PRECISION | The instantaneous rate computed from the left (earlier) side of the CounterSummary |

```
SELECT
id,
bucket,
irate_left(summary)
FROM (
SELECT
id,
time_bucket('15 min'::interval, ts) AS bucket,
counter_agg(ts, val) AS summary
FROM foo
GROUP BY id, time_bucket('15 min'::interval, ts)
) t
```

The instantaneous rate of change of the counter at the right (later) side of the
time range. Essentially, the `idelta_right`

divided by the duration between the
first and second observed points in the CounterSummary. This can be especially
useful for fast moving counters.

```
irate_right(
summary CounterSummary
) RETURNS DOUBLE PRECISION
```

Name | Type | Description |
---|---|---|

summary | CounterSummary | The input CounterSummary from a counter_agg call |

Name | Type | Description |
---|---|---|

irate_right | DOUBLE PRECISION | The instantaneous rate computed from the right (later) side of the CounterSummary |

```
SELECT
id,
bucket,
irate_right(summary)
FROM (
SELECT
id,
time_bucket('15 min'::interval, ts) AS bucket,
counter_agg(ts, val) AS summary
FROM foo
GROUP BY id, time_bucket('15 min'::interval, ts)
) t
```

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