Java Flink-将Avro数据流转换为表

我有卡夫卡的Avro格式的信息。这些必须转换为表，并使用SQL进行选择，然后转换为流，最后接收。 有多个具有不同Avro模式的卡夫卡主题，因此需要动态表

这是我正在使用的代码

StreamExecutionEnvironment env = ...;
StreamTableEnvironment tableEnv = StreamTableEnvironment.create(env);

FlinkKafkaConsumer<MyAvroClass> kafkaConsumer = ...;
var kafkaInputStream = env.addSource(kafkaConsumer, "kafkaInput");

Table table = tableEnv.fromDataStream(kafkaInputStream);
tableEnv.executeSql("DESCRIBE " + table).print();
...

我无法访问

项

字段的元素。当我打印表说明时，我看到项目是任意类型的

+------------+-------------------------------------------------------------+------+-----+--------+-----------+
|       name |                                                        type | null | key | extras | watermark |
+------------+-------------------------------------------------------------+------+-----+--------+-----------+
|   event_id |                                                      STRING | true |     |        |           |
|      items |                        LEGACY('RAW', 'ANY<java.util.List>') | true |     |        |           |
|       user |  LEGACY('STRUCTURED_TYPE', 'POJO<com.company.events.User>') | true |     |        |           |
+------------+-------------------------------------------------------------+------+-----+--------+-----------+  

+------------+-------------------------------------------------------------+------+-----+--------+-----------+
|名称|类型|空|键|附加|水印|
+------------+-------------------------------------------------------------+------+-----+--------+-----------+
|事件| id |字符串|真| | ||
|项目|遗留（“原始”、“任何”）|真实| | ||
|用户|遗留（'STRUCTURED_TYPE'，'POJO'）|真| | ||
+------------+-------------------------------------------------------------+------+-----+--------+-----------+  

如何将其转换为可用于查询项目的类型？ 提前谢谢

+------------+-------------------------------------------------------------+------+-----+--------+-----------+
|       name |                                                        type | null | key | extras | watermark |
+------------+-------------------------------------------------------------+------+-----+--------+-----------+
|   event_id |                                                      STRING | true |     |        |           |
|      items |                        LEGACY('RAW', 'ANY<java.util.List>') | true |     |        |           |
|       user |  LEGACY('STRUCTURED_TYPE', 'POJO<com.company.events.User>') | true |     |        |           |
+------------+-------------------------------------------------------------+------+-----+--------+-----------+