[jira] [Commented] (MADLIB-1091) Linear regression fails in merge for groups with small number of rows

["Cooper Sloan (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/MADLIB-1091?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16122543#comment-16122543 ] 

Cooper Sloan commented on MADLIB-1091:
--------------------------------------

Can you give the database version and madlib version please?

> Linear regression fails in merge for groups with small number of rows
> ---------------------------------------------------------------------
>
>                 Key: MADLIB-1091
>                 URL: https://issues.apache.org/jira/browse/MADLIB-1091
>             Project: Apache MADlib
>          Issue Type: Bug
>          Components: Module: Linear Regression
>            Reporter: Rahul Iyer
>             Fix For: v1.12
>
>
> Issue reported by user: 
> {quote}
> Hi all! I'm trying to run madlib's linear regression on a table with a group by column for a client engagement. There are 44.5M distinct values in the group by column and 14 data points for each group by value. Each regression should be very simple since its only 14 points but I'm getting an error:
> {code}
> Function "madlib.linregr_merge_states(madlib.bytea8,madlib.bytea8) is improperly aligned for alignment request in seek()"
> {code}
> Tested it on a few rows and it worked. Any idea what might be causing this error or what this error means? 
> {quote}



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