add data type and time zone considerations #6335
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Adding clarifying information about time zones and data types per [internal slack thread](https://dbt-labs.slack.com/archives/C03KHQRQUBX/p1729278831684459?thread_ts=1729023422.431269&cid=C03KHQRQUBX)
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mirnawong1
commented
Oct 22, 2024
mirnawong1
commented
Oct 22, 2024
courtneyholcomb
approved these changes
Oct 22, 2024
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| We recommend using `DATETIME` or `TIMESTAMP` data types for your time dimensions and time spine, as they support all granularities. The `DATE` data type may not support higher granularities like hours or minutes. | ||
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| - Consistent time zones — Ensure that all your time-related data uses the same time zone. MetricFlow supports UTC and currently doesn't perform any timezone manipulation. This means inconsistent time zones can cause unexpected results during aggregations and comparisons. |
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I would change this section slightly:
Time zones — MetricFlow currently doesn't perform any timezone manipulation. When working with timezone-aware data, inconsistent time zones may lead to unexpected results during aggregations and comparisons.
Reasons for the change:
- MF doesn't support UTC per se, it just ignores timezones entirely. UTC is just the most common way that people are likely to store their data for timezone consistency.
- I don't think we should ask them to ensure all their data uses the same timezone since they might have a valid reason for not doing that. We just want to warn them that there might be weird interactions in that case.
mirnawong1
commented
Oct 23, 2024
mirnawong1
commented
Oct 23, 2024
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thanks so much @courtneyholcomb ! |
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Adding clarifying information about time zones and data types per internal slack thread
🚀 Deployment available! Here are the direct links to the updated files: