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Re: [geomesa-users] Are both start time and end time used for efficient storage/retrieval? 
Hi Beau,
Actually, only one time is used in the index: the one SF_PROPERTY_START_TIME points to. 
The end time is not used in any special way.

You are absolutely correct regarding the usage:
simpleFeatureType.getUserData().put(Constants.SF_PROPERTY_START_TIME, "myStartTimeAttribute"); 

is the thing to do.

Cheers,
Mike




On 06/13/2014 11:13 AM, Beau Lalonde wrote:

Hi,

I am just starting to use a newer version of GeoMesa.  I was previously using a January version of GeoMesa.  In the past, I was always indexing data with both a start time and an end time.
For example:
	feature.setAttribute(Constants.SF_PROPERTY_START_TIME, startTime);
	feature.setAttribute(Constants.SF_PROPERTY_END_TIME,   endTime);


Looking over all of the new examples, I see code analogous to the following:
	simpleFeatureType.getUserData().put(Constants.SF_PROPERTY_START_TIME, "When");
                   ...
	feature.setAttribute("When", someTime);


I understand that time is used for efficiently storing/querying data.  My questions are:
1) if I want to index both a start time and an end time for my data, is the end time actually used in a special way by GeoMesa?
2) Or, is the start time attribute the only time attribute that is used in a special way?
3) If both start and end time are used, just for clarity, if I want to use both start time and end time, I would do something analogous to the following, correct?
	simpleFeatureType.getUserData().put(Constants.SF_PROPERTY_START_TIME, "myStartTimeAttribute");
	simpleFeatureType.getUserData().put(Constants.SF_PROPERTY_END_TIME, "myEndTimeAttribute");
                   ...
	feature.setAttribute("myStartTimeAttribute ", startTime);
	feature.setAttribute("myEndTimeAttribute ", endTime);


Thanks,

Beau

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