Timestream weird behavior with measure name

Question

Hello:
I'm having a weird behavior in Timestream where my data has a measure name "Latitude" which normally has decimal values like 121.451253 but it was stored as bigint truncating the decimal part. I also tried to send the measure as string in which case it was just ignored (not stored).
I noticed that changing the name of the measure or just using lowercase like "latitude", everything is fine... Is there any issue using some specific words? I checked there is no reserved word with that name...
Thanks

AWS-User-1847733 · Answer

Hi, the `Latitude` is not a special keyword. So no issues using Latitude.
- Measure names in Timestream are case sensitive. So `Latitude` and `latitude` will be two different measure names.
- Timestream offers flexible and incremental schema definition. This means you do not need to define schema upfront while creating a table. However, we do assign the type to a particular column (Latitude in this case) first time system ingests a measure name. if you first ingested Latitude with Big Int, it is not possible to change it to double. The system will treat Latitude as BIG INT. 
- You can check the schema of your table (Types for each column in table) in the query editor mode of the console

Hope this helps.

Timestream weird behavior with measure name

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