Julian Hyde created CALCITE-1623:
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             Summary: Make sure the Calendar inside DATE, TIME and TIMESTAMP 
literals has timezone UTC
                 Key: CALCITE-1623
                 URL: https://issues.apache.org/jira/browse/CALCITE-1623
             Project: Calcite
          Issue Type: Bug
            Reporter: Julian Hyde
            Assignee: Julian Hyde


At query preparation time, Calcite uses a Calendar to hold the value of DATE, 
TIME, TIMESTAMP literals. It assumes that Calendar has a UTC (GMT) time zone. 
Bad things probably happen if it does not. We should check, and throw 
IllegalArgumentException if not.

(For the record, Calendar is not used at run time. Those values become int or 
long, or Integer or Long if nullable.)



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