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https://issues.apache.org/jira/browse/PHOENIX-922?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14120180#comment-14120180
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Alex Warshavsky commented on PHOENIX-922:
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Another improvement would be to allow getting a number of sequences based on a
parameter rather than number of rows. This might require a function rather than
simple select statement. E.g. in postgress, there's a nextval() function.
http://www.postgresql.org/docs/8.1/static/functions-sequence.html
Phoenix could have an implementation of nextval(<sequenceName>, [numValues]),
where numValues is an optional parameter (defaulting to 1) which specifies how
many sequences to return.
SELECT nextval('mysequece', 5) for a sequence with default attributes would
return
1
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3
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5
> Select a sequence without a from clause
> ---------------------------------------
>
> Key: PHOENIX-922
> URL: https://issues.apache.org/jira/browse/PHOENIX-922
> Project: Phoenix
> Issue Type: Bug
> Affects Versions: 4.0.0
> Reporter: Dan Di Spaltro
>
> You should be able to select any "generator" type function from Phoenix
> without specifying a table. For instance a sequence needs an arbitrary
> potentially unrelated table just to get the next value. The fix should
> enable queries like this:
> {code}
> SELECT NEXT VALUE FOR my_seq
> {code}
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