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https://issues.apache.org/jira/browse/FLINK-32471?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Martijn Visser updated FLINK-32471:
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Component/s: Table SQL / Planner
> IS_NOT_NULL can add to SUITABLE_FILTER_TO_PUSH
> ----------------------------------------------
>
> Key: FLINK-32471
> URL: https://issues.apache.org/jira/browse/FLINK-32471
> Project: Flink
> Issue Type: Improvement
> Components: Table SQL / Planner
> Reporter: grandfisher
> Priority: Major
>
> According to FLINK-31273:
> The reason for the error is that other filters conflict with IS_NULL, but in
> fact it won't conflict with IS_NOT_NULL, because operators in
> SUITABLE_FILTER_TO_PUSH such as 'SqlKind.GREATER_THAN' has an implicit
> filter 'IS_NOT_NULL' according to SQL Semantics.
>
> So we think it is feasible to add IS_NOT_NULL to the SUITABLE_FILTER_TO_PUSH
> list.
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