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https://issues.apache.org/jira/browse/FLINK-5224?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15834195#comment-15834195
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ASF GitHub Bot commented on FLINK-5224:
---------------------------------------

Github user twalthr commented on a diff in the pull request:

    https://github.com/apache/flink/pull/3118#discussion_r97277366
  
    --- Diff: 
flink-libraries/flink-table/src/main/scala/org/apache/flink/table/runtime/TableFunctionCollector.scala
 ---
    @@ -0,0 +1,81 @@
    +/*
    + * Licensed to the Apache Software Foundation (ASF) under one
    + * or more contributor license agreements.  See the NOTICE file
    + * distributed with this work for additional information
    + * regarding copyright ownership.  The ASF licenses this file
    + * to you under the Apache License, Version 2.0 (the
    + * "License"); you may not use this file except in compliance
    + * with the License.  You may obtain a copy of the License at
    + *
    + *     http://www.apache.org/licenses/LICENSE-2.0
    + *
    + * Unless required by applicable law or agreed to in writing, software
    + * distributed under the License is distributed on an "AS IS" BASIS,
    + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    + * See the License for the specific language governing permissions and
    + * limitations under the License.
    + */
    +package org.apache.flink.table.runtime
    +
    +import org.apache.flink.util.Collector
    +
    +/**
    +  * The basic implementation of collector for 
[[org.apache.calcite.schema.TableFunction]].
    --- End diff --
    
    Shouldn't this be linking to a Flink TableFunction.


> 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
>            Assignee: Jark Wu
>
> 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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