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https://issues.apache.org/jira/browse/MADLIB-1172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16481315#comment-16481315
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Himanshu Pandey commented on MADLIB-1172:
-----------------------------------------
The following run, that's giving the warning in the logs, doesn't have a
grouping involved:
{code}
select
madlib.logregr_train('dummy_data','dummy_logit_gp','y','ARRAY[1,x1,x2,x3,x4,x5]',NULL,20,'irls');
{code}
I have tested the above data with grouping and it's giving around 300 records:
{code}
select
madlib.logregr_train('dummy_data','dummy_logit_gp','y','ARRAY[1,x1,x2,x3,x4,x5]','id',20,'irls');
{code}
> Logistic regression produces empty output table but no error message on
> Greenplum
> ---------------------------------------------------------------------------------
>
> Key: MADLIB-1172
> URL: https://issues.apache.org/jira/browse/MADLIB-1172
> Project: Apache MADlib
> Issue Type: Bug
> Components: Module: Logistic Regression
> Reporter: Frank McQuillan
> Assignee: Himanshu Pandey
> Priority: Minor
> Fix For: v1.15
>
> Attachments: Logistic-regression-empty-output.ipynb,
> load-data-sep.sql, load-data-singular.sql, load-data.sql
>
>
> Separated and singular data sets may produce and empty model table on
> Greenplum 4.3.x. On Postgres 9.6 the same example works OK.
> See the attache jupyter notebook and data sets for details.
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