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ardisdk:historical_data_api [2019/04/10 00:15] optrix |
ardisdk:historical_data_api [2019/04/10 00:19] (current) optrix |
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| =='continue' - Interpolated Without Back-Tracking== | =='continue' - Interpolated Without Back-Tracking== | ||
| - | Every time ARDI asks for history, it needs to find the most recent values //before the start of your time frame//. This can actually be an expensive and difficult operation. | + | Every time ARDI asks for history, it needs to find the most recent values //before the start of your time frame//. This can actually be an expensive and difficult operation for some historians - SQL databases in particular. |
| For systems that play back history, the **continue** function skips that step - ideal for situations where you begin by calling 'interp' then wish to continue viewing data from that point onwards. | For systems that play back history, the **continue** function skips that step - ideal for situations where you begin by calling 'interp' then wish to continue viewing data from that point onwards. | ||
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| **/api/gethistorybulk?start=2016-01-01 00:00:00&end=2016-01-02 00:00:00&points=273:18:measurement&function=interp&grain=600&format=tdl** | **/api/gethistorybulk?start=2016-01-01 00:00:00&end=2016-01-02 00:00:00&points=273:18:measurement&function=interp&grain=600&format=tdl** | ||
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| + | ===Getting Data Point Names At Runtime=== | ||
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| + | You can discover the data point names for an asset using the [[ardisdk:rest_language_agnostic_api|ARDI API]]. In particular, the [[ardisdk:api_asset_search]] and [[ardisdk:api_asset_info]] functions are quite useful. | ||