[jira] [Commented] (CALCITE-3433) EQUALS operator between date/timestamp types returns false if the type is nullable

["Julian Hyde (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CALCITE-3433?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16955806#comment-16955806 ] 

Julian Hyde commented on CALCITE-3433:
--------------------------------------

I wonder if the TIMESTAMP value is being stored as a Long (rather than long) because it is nullable, and we are using == to compare rather than Object.equals. 

> EQUALS operator between date/timestamp types returns false if the type is nullable
> ----------------------------------------------------------------------------------
>
>                 Key: CALCITE-3433
>                 URL: https://issues.apache.org/jira/browse/CALCITE-3433
>             Project: Calcite
>          Issue Type: Bug
>          Components: core
>    Affects Versions: 1.17.0, 1.18.0, 1.19.0, 1.20.0, 1.21.0
>            Reporter: jiezouSH
>            Priority: Major
>
> sql
> select time0=time1 from (select timestamp'2000-12-30 21:07:32'as time0,timestamp'2000-12-30 21:07:32'as time1 union all select cast(null as timestamp) as time0,cast(null as timestamp) as time1) calcs
> answer is false
> but 
> sql
> select time0=time1 from (select timestamp'2000-12-30 21:07:32'as time0,timestamp'2000-12-30 21:07:32'as time1) calcs
> answer is true
>  



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