Hi devs, I came across several questions while I was constructing records in AsterixDB. Hope someone can help me clear the confusion. :)
1. Write directly to data output or use SerializerDeserializer I am working with AbstractDataParser now. I see people using different ways to append attributes to data output. Either use: output.Write(typetag.serialize()); output.WriteInt(0); to write into data output directly, or use AInt8SerializerDeserializer.serialize(int8Serde) to serialize a AINT8 instance to output. *SerializerDeserializer uses writeByte to write output. My feeling is SerializerDeserializer offers another level of abstraction but with output I can write value directly without construct AType object. I am wondering if there are any preferences over these two? 2. RecordType validation after parser but before add to frame? My observation is after parser finish writing the output and pass it to next level, there is no such validation that checks whether non-optional field is null or not. In other words, parser has to guarantee that the processed records has to match the dataset definition(non-optional attribute cannot have null value). I tried to assign null value to non-null attributes. It will be inserted successfully but read records will have problem. 3. Set to null or skip For optional(nullable) attributes, if I want to insert a record with null value on that attribute. Should I assign null value or should I just skip it? (Probably this is related to the missing attribute that Yingyi mentioned today?) Thanks for your help. Best, Xikui
