Github user gabrielreid commented on the pull request: https://github.com/apache/incubator-phoenix/pull/26#issuecomment-42192917 I think that Timestamp is the only applicable JDBC type that is appropriate for this kind of function -- it's the only thing that represents a specific point in time, which is what's needed here. The fact that Timestamp is larger than desired for a value in the row key is an application-specific issue that (probably) shouldn't play too much of a role in defining the API for the function. However, I think there are ways around this -- for example, assuming that the intention is to get the time offset at midnight of the given date, I think you could just cast the date values to timestamps in your SQL statements.
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