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https://issues.apache.org/jira/browse/IMPALA-8367?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Sergio Leoni updated IMPALA-8367:
---------------------------------
    Description: 
The function
{code:sql}
 from_unixtime(bigint unixtime[, string format]) {code}
output error if the value of unixtime is NULL and format is 'u'.

 

This doesn't work:
{code:sql}
SELECT FROM_UNIXTIME(NULL, 'u')
{code}
{noformat}
Bad date/time conversion format: u{noformat}
 

This works:
{code:sql}
SELECT FROM_UNIXTIME(NULL, 'yyyy-MM-dd')
{code}
{noformat}
|from_unixtime(null, 'yyyy-mm-dd')|
|---------------------------------|
| NULL                            |
|---------------------------------|{noformat}
 

I haven't checked all the possible combinations.
Other software like Hive handles this correctly.

 

  was:
The function
{code:sql}
 from_unixtime(bigint unixtime[, string format]) {code}
output error if the value of unixtime is NULL and format is 'u'.

 

This doesn't work:
{code:sql}
SELECT FROM_UNIXTIME(NULL, 'u')
{code}
{noformat}
Bad date/time conversion format: u{noformat}
 

This works:
{code:sql}
SELECT FROM_UNIXTIME(NULL, 'yyyy-MM-dd')
{code}
{noformat}
|from_unixtime(null, 'yyyy-mm-dd')|
|---------------------------------|
| NULL                            |
|---------------------------------|{noformat}
 

I haven't check all the possible combinations.

 


> from_unixtime Bad date/time conversion format: u on NULL value
> --------------------------------------------------------------
>
>                 Key: IMPALA-8367
>                 URL: https://issues.apache.org/jira/browse/IMPALA-8367
>             Project: IMPALA
>          Issue Type: Bug
>          Components: Backend
>    Affects Versions: Impala 2.11.0
>         Environment: impalad version 2.11.0-cdh5.14.2 RELEASE (build 
> ed85dce709da9557aeb28be89e8044947708876c) Built on Tue Mar 27 13:39:48 PDT 
> 2018
>            Reporter: Sergio Leoni
>            Priority: Minor
>
> The function
> {code:sql}
>  from_unixtime(bigint unixtime[, string format]) {code}
> output error if the value of unixtime is NULL and format is 'u'.
>  
> This doesn't work:
> {code:sql}
> SELECT FROM_UNIXTIME(NULL, 'u')
> {code}
> {noformat}
> Bad date/time conversion format: u{noformat}
>  
> This works:
> {code:sql}
> SELECT FROM_UNIXTIME(NULL, 'yyyy-MM-dd')
> {code}
> {noformat}
> |from_unixtime(null, 'yyyy-mm-dd')|
> |---------------------------------|
> | NULL                            |
> |---------------------------------|{noformat}
>  
> I haven't checked all the possible combinations.
> Other software like Hive handles this correctly.
>  



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