[jira] [Assigned] (HIVE-26047) Vectorized LIKE UDF should use Re2J regex to address JDK-8203458

["Naresh P R (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-26047?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Naresh P R reassigned HIVE-26047:
---------------------------------


> Vectorized LIKE UDF should use Re2J regex to address JDK-8203458
> ----------------------------------------------------------------
>
>                 Key: HIVE-26047
>                 URL: https://issues.apache.org/jira/browse/HIVE-26047
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Naresh P R
>            Assignee: Naresh P R
>            Priority: Major
>
> Below pattern is taking a long time to validate regex in java8 with same trace as shown in java bug [[JDK-8203458||https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8203458] [https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8203458] []|https://bugs.java.com/bugdatabase/view_bug.do?bug_id=JDK-8203458]
> import java.util.regex.Pattern;
> public class ABCD {
>   public static void main(String args[]) {
>     String pattern = "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa_b";
>     Pattern CHAIN_PATTERN = Pattern.compile("(%?[^%_\\\\]+%?)+");
>     CHAIN_PATTERN.matcher(pattern).matches();
>   }
> }
> Same is reproducible with following SQL
> {code:java}
> create table table1(name string);
> insert into table1 (name) values ('aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa_b');
> select * from table1 where name like "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa_b";{code}



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