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https://issues.apache.org/jira/browse/FLINK-18164?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Benchao Li updated FLINK-18164:
-------------------------------
Description:
In IOS SQL standard, boolean is three-value type, including {{true}},
{{false}}, {{unknown}}
~~~~~~~~original description~~~~~~~~
Currently, if we compare null with other literals, the result will always be
false.
It's because the code gen always gives a default value (false) for the result.
And I think it's a bug if `null <> 'str'` is false.
It's reported from user-zh:
http://apache-flink.147419.n8.nabble.com/flink-sql-null-false-td3640.html
CC [~jark] [~ykt836]
was:
Currently, if we compare null with other literals, the result will always be
false.
It's because the code gen always gives a default value (false) for the result.
And I think it's a bug if `null <> 'str'` is false.
It's reported from user-zh:
http://apache-flink.147419.n8.nabble.com/flink-sql-null-false-td3640.html
CC [~jark] [~ykt836]
> null <> 'str' should be true
> ----------------------------
>
> Key: FLINK-18164
> URL: https://issues.apache.org/jira/browse/FLINK-18164
> Project: Flink
> Issue Type: Bug
> Components: Table SQL / API
> Reporter: Benchao Li
> Priority: Major
>
> In IOS SQL standard, boolean is three-value type, including {{true}},
> {{false}}, {{unknown}}
> ~~~~~~~~original description~~~~~~~~
> Currently, if we compare null with other literals, the result will always be
> false.
> It's because the code gen always gives a default value (false) for the
> result. And I think it's a bug if `null <> 'str'` is false.
> It's reported from user-zh:
> http://apache-flink.147419.n8.nabble.com/flink-sql-null-false-td3640.html
> CC [~jark] [~ykt836]
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