On Feb 3, 2012, at 6:24 PM, Michael Hipp wrote:
> Is there an example or other explanation of how to use a SEQUENCE that is not
> a primary key on a table, particularly how to create the sequence, get next
> value, reset seq, etc. I see the base docs here, but it's not obvious to me
> how exactly to use this class.
>
> http://docs.sqlalchemy.org/en/latest/core/schema.html#sqlalchemy.schema.Sequence
the sequence is created on the Python side given a name:
mysequence = Sequence("mysequence")
so the docstrings list out "create()", used as such:
mysequence.create(engine)
emits CREATE SEQUENCE
and next_value(), returns a func element which can be executed:
engine.execute(mysequence.next_value())
there's not a built in feature for RESET or other alterations of sequences
right now, you'd have to execute() the appropriate SQL for your target backend.
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