?????? ????????flink 1.12.0??????org.apach.flink.table.runtime.generated.CompileUtils.compile()????????????DataSteam????????????????????????Table program cannot be compiled. This is a bug. Please file an issue.?????????????????? public abstract java.lang.Object org.apache.flink.api.java.functions.KeySelector.getKey(java.lang.Object) ??????????????????????????????????????????????????????????????????????????????????????????????????????