[jira] [Created] (FLINK-21247) flink iceberg table map<string,string> cannot convert to datastream

[Shang Yuanchun (Jira)]

donglei created FLINK-21247:
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             Summary: flink iceberg table map<string,string> cannot convert to datastream
                 Key: FLINK-21247
                 URL: https://issues.apache.org/jira/browse/FLINK-21247
             Project: Flink
          Issue Type: New Feature
         Environment: iceberg master

flink 1.12

 

 
            Reporter: donglei
         Attachments: image-2021-02-03-15-38-42-340.png, image-2021-02-03-15-40-27-055.png, image-2021-02-03-15-41-34-426.png, image-2021-02-03-15-43-19-919.png

Flink Iceberg Table with map<string,string>
!image-2021-02-03-15-38-42-340.png!
 
we want to read the table like this :
 
String querySql = "SELECT ftime,extinfo,country,province,operator,apn,gw,src_ip_head,info_str,product_id,app_version,sdk_id,sdk_version,hardware_os,qua,upload_ip,client_ip,upload_apn,event_code,event_result,package_size,consume_time,event_value,event_time,upload_time,boundle_id,uin,platform,os_version,channel,brand,model from bfzt3 ";
Table table = tEnv.sqlQuery(querySql);

DataStream<AttaInfo> sinkStream = tEnv.toAppendStream(table, Types.POJO(AttaInfo.class, map));

sinkStream.map(x->1).returns(Types.INT).keyBy(new NullByteKeySelector<Integer>()).reduce((x,y) -> {
 return x+y;
}).print();
 
 
when read  we find a exception
 
2021-02-03 15:37:57
java.lang.ClassCastException: org.apache.iceberg.flink.data.FlinkParquetReaders$ReusableMapData cannot be cast to org.apache.flink.table.data.binary.BinaryMapData
    at org.apache.flink.table.runtime.typeutils.MapDataSerializer.copy(MapDataSerializer.java:107)
    at org.apache.flink.table.runtime.typeutils.MapDataSerializer.copy(MapDataSerializer.java:47)
    at org.apache.flink.table.runtime.typeutils.RowDataSerializer.copyRowData(RowDataSerializer.java:166)
    at org.apache.flink.table.runtime.typeutils.RowDataSerializer.copy(RowDataSerializer.java:129)
    at org.apache.flink.table.runtime.typeutils.RowDataSerializer.copy(RowDataSerializer.java:50)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.pushToOperator(CopyingChainingOutput.java:69)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:46)
    at org.apache.flink.streaming.runtime.tasks.CopyingChainingOutput.collect(CopyingChainingOutput.java:26)
    at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:50)
    at org.apache.flink.streaming.api.operators.CountingOutput.collect(CountingOutput.java:28)
    at org.apache.flink.streaming.api.operators.StreamSourceContexts$ManualWatermarkContext.processAndCollect(StreamSourceContexts.java:317)
    at org.apache.flink.streaming.api.operators.StreamSourceContexts$WatermarkContext.collect(StreamSourceContexts.java:411)
    at org.apache.flink.streaming.api.functions.source.InputFormatSourceFunction.run(InputFormatSourceFunction.java:92)
    at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:110)
    at org.apache.flink.streaming.api.operators.StreamSource.run(StreamSource.java:66)
    at org.apache.flink.streaming.runtime.tasks.SourceStreamTask$LegacySourceFunctionThread.run(SourceStreamTask.java:241)
 
we find that iceberg map is  ReusableMapData implements MapData 
!image-2021-02-03-15-40-27-055.png!
 
this is the exception 
!image-2021-02-03-15-41-34-426.png!
MapData has two default implements  GenericMapData and BinaryMapData
from iceberg implement is ReusableMapData
 
so i think that code should change to like this 
!image-2021-02-03-15-43-19-919.png!
 



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