sijie commented on a change in pull request #4022: Making use of builtin
schemas for primitive types
URL: https://github.com/apache/pulsar/pull/4022#discussion_r274250231
##########
File path:
pulsar-sql/presto-pulsar/src/main/java/org/apache/pulsar/sql/presto/PulsarRecordCursor.java
##########
@@ -161,6 +161,47 @@ private SchemaHandler getSchemaHandler(Schema schema,
SchemaType schemaType,
case AVRO:
schemaHandler = new AvroSchemaHandler(schema, columnHandles);
break;
+ case STRING:
Review comment:
There is a method in `AutoConsumeSchema#getSchema` (which can be moved to
Schema.java => Schema.getSchema(SchemaType type)` to retrieve a schema instance
using SchemaInfo.
So the logic here can be simplified with
```
schemaHandler = new PrimitiveSchemaHandler(Schema.getSchema(schemaType));
```
also I think JSON and Avro schema handler should be changed to use pulsar
schema for deserialization. because there are changes adding there to support
schema versioning. If we still have a separated schema handler in presto, we
can't benefit from the changes happening in pulsar schemas. although this
change should be done in a separate PR.
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