[jira] [Work logged] (HIVE-24839) SubStrStatEstimator.estimate throws NullPointerException

["ASF GitHub Bot (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HIVE-24839?focusedWorklogId=559936&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-559936 ]

ASF GitHub Bot logged work on HIVE-24839:
-----------------------------------------

                Author: ASF GitHub Bot
            Created on: 02/Mar/21 13:00
            Start Date: 02/Mar/21 13:00
    Worklog Time Spent: 10m 
      Work Description: ujc714 opened a new pull request #2034:
URL: https://github.com/apache/hive/pull/2034


   ### What changes were proposed in this pull request?
   It fixes a bug in UDFSubstr.SubStrStatEstimator. 
   
   ### Why are the changes needed?
   The method getRangeWidth didn't check if range is null before it references the properties of range. When Hive estimates the stats on a substr function with a child UDF, the compilation might fail due to NullPointerException.
   
   ### Does this PR introduce _any_ user-facing change?
   No
   
   ### How was this patch tested?
   Start MiniHS2Cluster then run the following queries manually:
   ```
   create table t0 (s string);
   create table t1 (s string, i int);
   insert into t0 select "abc";
   insert into t1 select "abc", 4;
   select substr(t0.s, t1.i-1) from t0 join t1 on t0.s=t1.s;
   ```
   


----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.

For queries about this service, please contact Infrastructure at:
users@infra.apache.org


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

            Worklog Id:     (was: 559936)
    Remaining Estimate: 0h
            Time Spent: 10m

> SubStrStatEstimator.estimate throws NullPointerException
> --------------------------------------------------------
>
>                 Key: HIVE-24839
>                 URL: https://issues.apache.org/jira/browse/HIVE-24839
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Robbie Zhang
>            Assignee: Robbie Zhang
>            Priority: Major
>          Time Spent: 10m
>  Remaining Estimate: 0h
>
> This issue can be reproduced by running the following queries:
> {code:java}
> create table t0 (s string);
> create table t1 (s string, i int);
> insert into t0 select "abc";
> insert into t1 select "abc", 4;
> select substr(t0.s, t1.i-1) from t0 join t1 on t0.s=t1.s;
> {code}
> The select query fails with error:
> {code:java}
> Error: Error while compiling statement: FAILED: NullPointerException null (state=42000,code=40000)
> {code}
>  
>  



--
This message was sent by Atlassian Jira
(v8.3.4#803005)