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https://issues.apache.org/jira/browse/SOLR-10303?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15954260#comment-15954260
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Joel Bernstein commented on SOLR-10303:
---------------------------------------
I really like the design of this. A couple things to think about:
1) Let's create the concept of a TupleContext, which the SelectStream passes to
each evaluator. This will allow us to share LocalDateTime instance across
date/time evaluators. The logic would be: check to see if the LocalDateTime for
a specific field is already in the TupleContext, and use it rather then parsing
a new Instant. The SelectStream would clear the TupleContext after each Tuple
is read. This will speed up:
{code}
select(expr,
year(field1) as year,
month(field1) as month,
day(field1) as day)
{code}
2) I think we only need to support two formats to parse from: the date string
format and the Long epoch time.
> Add date/time Stream Evaluators
> -------------------------------
>
> Key: SOLR-10303
> URL: https://issues.apache.org/jira/browse/SOLR-10303
> Project: Solr
> Issue Type: New Feature
> Security Level: Public(Default Security Level. Issues are Public)
> Reporter: Joel Bernstein
> Attachments: SOLR-10303.patch
>
>
> This ticket will add Stream Evaluators that extract date/time values from a
> Solr date field. The following Evaluators will be supported:
> hour (date)
> minute (date)
> month (date)
> monthname(date)
> quarter(date)
> second (date)
> year(date)
> Syntax:
> {code}
> select(id,
> year(recdate) as year,
> month(recdate) as month,
> day(recdate) as day,
> search(logs, q="blah", fl="id, recdate", sort="recdate asc",
> qt="/export"))
> {code}
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