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https://issues.apache.org/jira/browse/CALCITE-1177?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15227572#comment-15227572
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Josh Elser commented on CALCITE-1177:
-------------------------------------
re: breaking changes in Avatica. The only thing I can think of would be new
methods added to some interfaces that Calcite implements. We could look at
hiding some of this breakage by introducing a default implementation in Avatica
that Calcite would extend instead.
Either way, most likely all you would need to do to compile against 1.8.0 of
avatica is stub out those new methods. I would be very interested to know if
there is more that would need to be done.
> Add support for more time units in extract function
> ---------------------------------------------------
>
> Key: CALCITE-1177
> URL: https://issues.apache.org/jira/browse/CALCITE-1177
> Project: Calcite
> Issue Type: Improvement
> Components: core
> Reporter: Venki Korukanti
> Assignee: Julian Hyde
>
> Currently extract function support following units YEAR, MONTH, DAY, HOUR,
> MINUTE, SECOND. Add support for more units: CENTURY, DECADE, DOW, DOY, EPOCH,
> MILLENNIUM, QUARTER, WEEK.
> Definitions of these units is similar to Postgres:
> http://www.postgresql.org/docs/9.1/static/functions-datetime.html#FUNCTIONS-DATETIME-EXTRACT
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