[jira] [Comment Edited] (ASTERIXDB-1179) Similarity functions should coerce numeric types

["Taewoo Kim (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/ASTERIXDB-1179?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15146347#comment-15146347 ] 

Taewoo Kim edited comment on ASTERIXDB-1179 at 2/14/16 3:10 AM:
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Sorry for the late check. I also just checked that the problem still exists. What should be the desired behavior in this case? Like when we do a hash, we need to convert all numerical values to double and calculate similarity? 


was (Author: wangsaeu):
Sorry for the late check. What should be the desired behavior in this case? Like when we do a hash, we need to convert all numerical values to double and calculate similarity? 

> Similarity functions should coerce numeric types
> ------------------------------------------------
>
>                 Key: ASTERIXDB-1179
>                 URL: https://issues.apache.org/jira/browse/ASTERIXDB-1179
>             Project: Apache AsterixDB
>          Issue Type: Bug
>          Components: AsterixDB, Similarity
>         Environment: master (I50442edc3187d003987bc4119559eda676c9b2eb)
>            Reporter: Cameron Samak
>            Assignee: Taewoo Kim
>
> Similarity functions should coerce to the largest numeric type compared. Currently, comparing lists with different numeric types always results in similarity 0 or max edit distance.
> If on the other hand this is intended behavior, a note in the documentation would be helpful. Or, more consistently, a type error should be thrown (as is currently implemented for edit-distance(string, OrderedList)).
> Example query:
> {code}
> similarity-jaccard([1,7,9], [1,5,9])
> similarity-jaccard([int32('1'),int32('7'),int32('9')], [1,5,9])
> edit-distance([1,5,9], [1,6,9])
> edit-distance([int32('1'),int32('5'),int32('9')], [1,6,9])
> {code}
> Result:
> {code}
> 0.5f
> 0.0f
> 1
> 3
> {code}



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