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

[ASF GitHub Bot (Jira)]

     [ 
https://issues.apache.org/jira/browse/HIVE-26047?focusedWorklogId=775749&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-775749
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ASF GitHub Bot logged work on HIVE-26047:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 30/May/22 00:24
            Start Date: 30/May/22 00:24
    Worklog Time Spent: 10m 
      Work Description: github-actions[bot] closed pull request #3117: 
HIVE-26047: Vectorized LIKE UDF should use Re2J regex to address JDK-8203458
URL: https://github.com/apache/hive/pull/3117




Issue Time Tracking
-------------------

    Worklog Id:     (was: 775749)
    Time Spent: 50m  (was: 40m)

> 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
>              Labels: pull-request-available
>          Time Spent: 50m
>  Remaining Estimate: 0h
>
> 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]
>  
> {code:java}
> import java.util.regex.Pattern;
> public class Test {
>   public static void main(String args[]) {
>     String pattern = 
> "aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa_b";
>  
>     Pattern CHAIN_PATTERN = Pattern.compile("(%?[^%_\\\\]+%?)+");
>     CHAIN_PATTERN.matcher(pattern).matches(); 
>   }
> }
> {code}
> 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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