Retrieval subsystem
- Last UpdatedMar 19, 2025
- 1 minute read
The Retrieval subsystem does the following:
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Fetches history data from history blocks on disk.
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Formats data so that it can be passed up through the system to the AVEVA Historian OLE DB provider or other HCAL-enabled client applications.
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Returns information regarding the history blocks, such as the start and end dates and the location.