[jira] [Created] (FLINK-5224) Improve UDTF: emit rows directly instead of buffering them

[Jark Wu (JIRA)]

Jark Wu created FLINK-5224:
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             Summary: Improve UDTF: emit rows directly instead of buffering them
                 Key: FLINK-5224
                 URL: https://issues.apache.org/jira/browse/FLINK-5224
             Project: Flink
          Issue Type: Improvement
          Components: Table API & SQL
            Reporter: Jark Wu

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This needs to code generate a `Collector` and register it into instance of 
{{TableFunction}}, and emit the rows generated by the UDTF directly instead of 
buffering them.



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