James Starr created CALCITE-4942:
------------------------------------
Summary: Deprecate Bolier plate for Rel Metadata
Key: CALCITE-4942
URL: https://issues.apache.org/jira/browse/CALCITE-4942
Project: Calcite
Issue Type: Improvement
Reporter: James Starr
Assignee: James Starr
To define a Rel metadata type you need to create 2 class, 2 methods and a
static variable. However, current implementation of RelMetadata back by Janino
only require the Handler class a single method signature. The current metadata
handler interface also has a generic that provides no type safety through out
code.
Currently to define a rel metadata type:
{code:java}
public class MyMetadata extends Metadata {
MetadataDef DEF = ...
VALUE myMethod1();
class Handler extends RelHandler<MyMetadata> {
VALUE myMethod2(RelNode, MetadataQuery)
}
}
{code}
What is actually needed to define a rel metadata type:
{code:java}
class MyMetadataHandler extends RelHandler {
VALUE myMethod(RelNode, MetadataQuery)
}
{code}
--
This message was sent by Atlassian Jira
(v8.20.1#820001)
