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https://issues.apache.org/jira/browse/MADLIB-1001?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15335033#comment-15335033
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Frank McQuillan commented on MADLIB-1001:
-----------------------------------------
Let's simplify this a bit:
{code}
* -- ALL columns in input table + session column
'x, y, z, ...' -- list of columns you want + session column. This list could
include the partition expression or other expressions as desired.
{code}
> Sessionization - Phase 2 (output controls)
> ------------------------------------------
>
> Key: MADLIB-1001
> URL: https://issues.apache.org/jira/browse/MADLIB-1001
> Project: Apache MADlib
> Issue Type: New Feature
> Components: Module: Utilities
> Reporter: Frank McQuillan
> Assignee: Nandish Jayaram
> Priority: Minor
> Labels: gsoc2016, starter
> Fix For: v1.9.1
>
>
> Story
> As a data scientist, I want to perform session reconstruction on my data set,
> so that I can prepare for input into other algorithms like path functions, or
> predictive analytics algorithms.
> This is a follow on to
> https://issues.apache.org/jira/browse/MADLIB-909
> to add optional output controls.
> Details
> Proposed interface changes:
> {code}
> sessionize (
> source_table,
> output_table,
> partition_expr,
> time_stamp,
> max_time,
> output_cols -- new
> create_view -- new
> )
> {code}
> where
> output_cols (optional)
> TEXT. Controls which columns are output. If NULL (default), only
> the partition, time stamp and the generated session ID columns are output.
> (The assumption is that the partition columns together with the time stamp
> column will be sufficient to perform a join with the input table.) If '*',
> all columns from the source table are output in addition to the generated
> session ID. Otherwise user can provide a specific list of columns of
> interest to output 'x, y, z, ...'
> 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.
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