On 7/20/16 4:17 PM, Joe Hellerstein wrote:
I heartily concur with this assessment FWIW. I generally use views or WITH
clauses myself when building up these kinds of pipelines.
Note that WITH forces materialization. It's almost as bad as temp tables.
In my experience, the PostgreSQL
I heartily concur with this assessment FWIW. I generally use views or WITH
clauses myself when building up these kinds of pipelines.
In my experience, the PostgreSQL optimizer is not great at collapsing views
though. So caveat emptor. Users should be made very aware of EXPLAIN!
J
On
Hey Jim,
Thank you for the thoughtful response.
Given your comments, I think we ought to stick with a view as the default
for sessionize. Looking ahead to MADlib 2.0, one thing we want to better
support is workflows since chaining operations together is such a common
data science thing to do.
On 7/19/16 7:36 PM, Frank McQuillan wrote:
"create_view (optional)
BOOLEAN default: TRUE. Determines whether to create a view or materialize a
table as output. If you only needed session info once, creating a view
could be significantly faster than materializing as a table."
Question is:
Hi,
I have been testing the sessionize function lately
https://issues.apache.org/jira/browse/MADLIB-909
https://issues.apache.org/jira/browse/MADLIB-1001
and am wondering about this param:
"create_view (optional)
BOOLEAN default: TRUE. Determines whether to create a view or materialize a
table
