[jira] [Created] (FLINK-27835) Introduce LeafPredicate interface and children method in Predicate

["Caizhi Weng (Jira)" <ji...@apache.org>]

Caizhi Weng created FLINK-27835:
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             Summary: Introduce LeafPredicate interface and children method in Predicate
                 Key: FLINK-27835
                 URL: https://issues.apache.org/jira/browse/FLINK-27835
             Project: Flink
          Issue Type: Sub-task
            Reporter: Caizhi Weng


We'd like to expose a more simple interface in the row data abstraction layer. Instead of the {{withPartitionFilter}}, {{withKeyFIlter}} and {{withValueFilter}} methods in {{FileStoreScan}}, we'd like to introduce {{RowDataScan}} containing only one {{withFilter}} method. We'll enclose the logic to extract partition predicate or key predicate in this method.

To extract partition predicate from a big predicate object we'll need to look into this predicate tree. That's why we'll need {{children}} method and {{LeafPredicate}} interface to help us represent this tree structure.



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