[GitHub] zrjnike opened a new pull request #6709: Release 1.6

[GitBox]

zrjnike opened a new pull request #6709: Release 1.6
URL: https://github.com/apache/flink/pull/6709
 
 
   When I define a user-defined function，When I use the sql client, I get an 
error (flink version 1.6.0).
   
   ```
   Exception in thread "main" org.apache.flink.table.client.SqlClientException: 
Unexpected exception. This is a bug. Please consider filing an issue.
        at org.apache.flink.table.client.SqlClient.main(SqlClient.java:184)
   Caused by: java.lang.RuntimeException: The Nothing type cannot have a 
serializer.
        at 
org.apache.flink.api.common.typeinfo.NothingTypeInfo.createSerializer(NothingTypeInfo.java:74)
        at 
org.apache.flink.api.java.typeutils.RowTypeInfo.createSerializer(RowTypeInfo.java:240)
        at 
org.apache.flink.api.java.typeutils.TupleTypeInfo.createSerializer(TupleTypeInfo.java:107)
        at 
org.apache.flink.api.java.typeutils.TupleTypeInfo.createSerializer(TupleTypeInfo.java:52)
        at 
org.apache.flink.table.client.gateway.local.result.CollectStreamResult.<init>(CollectStreamResult.java:65)
        at 
org.apache.flink.table.client.gateway.local.result.ChangelogCollectStreamResult.<init>(ChangelogCollectStreamResult.java:43)
        at 
org.apache.flink.table.client.gateway.local.ResultStore.createResult(ResultStore.java:72)
        at 
org.apache.flink.table.client.gateway.local.LocalExecutor.executeQueryInternal(LocalExecutor.java:380)
        at 
org.apache.flink.table.client.gateway.local.LocalExecutor.executeQuery(LocalExecutor.java:239)
        at 
org.apache.flink.table.client.cli.CliClient.callSelect(CliClient.java:376)
        at 
org.apache.flink.table.client.cli.CliClient.callCommand(CliClient.java:255)
        at java.util.Optional.ifPresent(Optional.java:159)
        at org.apache.flink.table.client.cli.CliClient.open(CliClient.java:184)
        at org.apache.flink.table.client.SqlClient.openCli(SqlClient.java:117)
        at org.apache.flink.table.client.SqlClient.start(SqlClient.java:101)
        at org.apache.flink.table.client.SqlClient.main(SqlClient.java:172)
   ```
   
   User-defined Functions code:
   
   ```
   public class Split extends TableFunction<Tuple2<String, Integer>>{
        private String separator = " ";
           
           public Split(String separator) {
               this.separator = separator;
           }
           
           public void eval(String str) {
               for (String s : str.split(separator)) {
                   // use collect(...) to emit a row
                   collect(new Tuple2<String, Integer>(s, s.length()));
               }
           }
   }
   ```
   
   SQL yaml config:
   
   ```
   functions:
     \- name: user_split
       from: class
       class: com.youzu.flink.udf.Split
       constructor:
           - type: VARCHAR
             value: sd
   ```
   
   SQL Client command:
   
   `./bin/sql-client.sh embedded --jar 
/home/datacenter/flink/flink-1.6.0/udfs/flink-udf-1.0-SNAPSHOT.jar
   `
   SQL:
   
   `select user_split('sads asasd sasa')`
   
   @jpzk @zitterbewegung @hadronzoo please help,thanks
   

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