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https://issues.apache.org/jira/browse/HIVE-6140?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13862177#comment-13862177
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Anandha L Ranganathan commented on HIVE-6140:
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[~thejas]/[~cartershanklin]
Could you provide data.csv file that caused the problem. Otherwise provide
example of the data.
> trim udf is very slow
> ---------------------
>
> Key: HIVE-6140
> URL: https://issues.apache.org/jira/browse/HIVE-6140
> Project: Hive
> Issue Type: Bug
> Components: UDF
> Reporter: Thejas M Nair
> Assignee: Anandha L Ranganathan
>
> Paraphrasing what was reported by [~cartershanklin] -
> I used the attached Perl script to generate 500 million two-character strings
> which always included a space. I loaded it using:
> create table letters (l string);
> load data local inpath '/home/sandbox/data.csv' overwrite into table letters;
> Then I ran this SQL script:
> select count(l) from letters where l = 'l ';
> select count(l) from letters where trim(l) = 'l';
> First query = 170 seconds
> Second query = 514 seconds
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