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From "Alexander Pivovarov (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-9556) create UDF to calculate the Levenshtein distance between two strings
Date Wed, 18 Feb 2015 05:40:11 GMT

     [ https://issues.apache.org/jira/browse/HIVE-9556?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Alexander Pivovarov updated HIVE-9556:
--------------------------------------
    Summary: create UDF to calculate the Levenshtein distance between two strings  (was: create
UDF to measure strings similarity using Levenshtein Distance algo)

> create UDF to calculate the Levenshtein distance between two strings
> --------------------------------------------------------------------
>
>                 Key: HIVE-9556
>                 URL: https://issues.apache.org/jira/browse/HIVE-9556
>             Project: Hive
>          Issue Type: Improvement
>          Components: UDF
>            Reporter: Alexander Pivovarov
>            Assignee: Alexander Pivovarov
>         Attachments: HIVE-9556.1.patch, HIVE-9556.2.patch
>
>
> algorithm description http://en.wikipedia.org/wiki/Levenshtein_distance
> {code}
> --one edit operation, greatest str len = 12
> str_sim_levenshtein('Test String1', 'Test String2') = 1 - 1 / 12 = 0.91666667
> {code}



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