grandfisher created FLINK-32471:
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Summary: 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
Reporter: grandfisher
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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