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Returns the timeline of states in a timeline aggregate.
2. state_timeline(
4. agg TimelineAgg
6. ) RETURNS (TEXT, TIMESTAMPTZ, TIMESTAMPTZ)
8. state_int_timeline(
10. agg TimelineAgg
12. ) RETURNS (BIGINT, TIMESTAMPTZ, TIMESTAMPTZ)
warning
Experimental features could have bugs. They might not be backwards compatible, and could be removed in future releases. Use these features at your own risk, and do not use any experimental features in production.
Required arguments
| Name | Type | Description |
|---|---|---|
agg |
TimelineAgg |
The aggregate to get data for |
Returns
| Column | Type | Description |
|---|---|---|
state |
TEXT or BIGINT |
A state found in the TimelineAgg |
start_time |
TIMESTAMPTZ |
The time the state started at (inclusive) |
end_time |
TIMESTAMPTZ |
The time the state ended at (exclusive) |
Sample usage
Getting the history of states in a timeline aggregate:
2. SELECT state, start_time, end_time FROM toolkit_experimental.state_timeline(
4. (SELECT toolkit_experimental.timeline_agg(ts, state) FROM states_test));
Example output:
2. state | start_time | end_time
4. -------+------------------------+------------------------
6. START | 2020-01-01 00:00:00+00 | 2020-01-01 00:00:11+00
8. OK | 2020-01-01 00:00:11+00 | 2020-01-01 00:01:00+00
10. ERROR | 2020-01-01 00:01:00+00 | 2020-01-01 00:01:03+00
12. OK | 2020-01-01 00:01:03+00 | 2020-01-01 00:02:00+00
14. STOP | 2020-01-01 00:02:00+00 | 2020-01-01 00:02:00+00
