[FLINK-6334] Refactoring UDTF interface - ASF JIRA

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Details

Type: Improvement
Status: Closed
Priority: Blocker
Resolution: Fixed
Affects Version/s: None
Fix Version/s: 1.3.0
Component/s: Table SQL / API
Labels:
None

Description

The current UDTF leverages the table.join(expression) interface, which is not a proper interface in terms of semantics. We would like to refactor this to let UDTF use table.join(table) interface. Very briefly, UDTF's apply method will return a Table Type, so Join(UDTF('a, 'b, ...) as 'c) shall be viewed as join(Table)