Himanshu Pandey commented on MADLIB-1172:

Yes, we can print something like this as a warning : 

"Please Note: Input data is not correct numerically and may generate improper 

> 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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