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From "Chen Li (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (ASTERIXDB-1556) Prefix-based multi-way Fuzzy-join generates an exception.
Date Tue, 02 Aug 2016 16:46:20 GMT

    [ https://issues.apache.org/jira/browse/ASTERIXDB-1556?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15404360#comment-15404360
] 

Chen Li commented on ASTERIXDB-1556:
------------------------------------

It seems to be a bug?  A correct implementation should consider the memory budget of the operator
set the size of the hash table?

[~wangsaeu] Minor suggestion on your Jira comments: it will be good to format the code nicely
using a special Jira syntax.

> Prefix-based multi-way Fuzzy-join generates an exception.
> ---------------------------------------------------------
>
>                 Key: ASTERIXDB-1556
>                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-1556
>             Project: Apache AsterixDB
>          Issue Type: Bug
>            Reporter: Taewoo Kim
>            Assignee: Taewoo Kim
>         Attachments: 2wayjoin.pdf, 2wayjoin.rtf, 2wayjoinplan.rtf, 3wayjoin.pdf, 3wayjoin.rtf,
3wayjoinplan.rtf
>
>
> When we enable prefix-based fuzzy-join and apply the multi-way fuzzy-join ( > 2),
the system generates an out-of-memory exception. 
> Since a fuzzy-join is created using 30-40 lines of AQL codes and this AQL is translated
into massive number of operators (more than 200 operators in the plan for a 3-way fuzzy join),
it could generate out-of-memory exception.



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