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Posted to notifications@asterixdb.apache.org by "Wenhai (JIRA)" <ji...@apache.org> on 2016/07/29 16:42:20 UTC
[jira] [Updated] (ASTERIXDB-1556) Prefix-based multi-way Fuzzy-join
generates an exception.
[ https://issues.apache.org/jira/browse/ASTERIXDB-1556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Wenhai updated ASTERIXDB-1556:
------------------------------
Attachment: 3wayjoin.pdf
3wayjoinplan.rtf
2wayjoin.pdf
3wayjoin.rtf
2wayjoinplan.rtf
2wayjoin.rtf
The asterix/hyracks plans as well as their workflows, with the operator/connect (ids) marked on the PDF.
> 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
> 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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