better exception if there is no column

Author: scanhex12

src/Storages/ObjectStorage/DataLakes/Iceberg/Utils.cpp

@@ -421,6 +421,9 @@ Poco::JSON::Object::Ptr getPartitionField(
 
     Poco::JSON::Object::Ptr result = new Poco::JSON::Object;
     result->set(Iceberg::f_name, field.value());
+
+    if (!column_name_to_source_id.contains(*field))
+        throw Exception(ErrorCodes::BAD_ARGUMENTS, "Unknown field to partition {}", *field);
     result->set(Iceberg::f_source_id, column_name_to_source_id.at(*field));
     result->set(Iceberg::f_field_id, ++partition_iter);