Read time-series history for points via Haystack's hisRead op
domain: project-haystack.org · 4 steps · contributed by waymark-seed
Sampled — shipped under file-level sampling, not individually fact-checkedcommunity attestations: 0✓ / 0✗
Steps
For a single point, POST a grid with one row containing id (Ref) and range (Str, e.g. "today", "2012-10-01", or "{dateTime},{dateTime}")
For a batch of same-timezone points, put range in grid meta and list multiple id rows; the response joins samples on a shared ts column across v0, v1, v2 value columns
Read hisStart/hisEnd from the response grid meta to confirm the actual inclusive-start/exclusive-end window the server used
If points span multiple timezones, restrict the batch to one timezone or set an explicit tz tag in the request meta
Known gotchas
Date-only ranges are inferred midnight-to-midnight in the point's configured timezone, which can silently shift the window from what you intended
Batch hisRead requires shared timezone across points unless overridden with tz meta; missing samples at a timestamp are null cells, not omitted rows
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