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https://issues.apache.org/jira/browse/AVRO-3257?focusedWorklogId=685370&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-685370
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ASF GitHub Bot logged work on AVRO-3257:
----------------------------------------

                Author: ASF GitHub Bot
            Created on: 23/Nov/21 15:57
            Start Date: 23/Nov/21 15:57
    Worklog Time Spent: 10m 
      Work Description: opwvhk commented on a change in pull request #1411:
URL: https://github.com/apache/avro/pull/1411#discussion_r755272274



##########
File path: 
lang/java/compiler/src/main/javacc/org/apache/avro/compiler/idl/idl.jj
##########
@@ -1444,15 +1443,42 @@ Schema UnannotatedType(Map<String, JsonNode> props):
 {
   Schema s;
 }
+{
+  (
+    s = NullableType(props)

Review comment:
       This is what makes the magic possible:
   1. Primitive/logical & reference types are handled differently (elsewhere)
   2. The other types are handled as usual




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Issue Time Tracking
-------------------

    Worklog Id:     (was: 685370)
    Time Spent: 0.5h  (was: 20m)

> IDL: add syntax to create optional fields
> -----------------------------------------
>
>                 Key: AVRO-3257
>                 URL: https://issues.apache.org/jira/browse/AVRO-3257
>             Project: Apache Avro
>          Issue Type: Improvement
>          Components: java, spec
>            Reporter: Oscar Westra van Holthe - Kind
>            Assignee: Oscar Westra van Holthe - Kind
>            Priority: Minor
>              Labels: javacc, pull-request-available
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> To define optional values, Avro has the "union with the null type" 
> construction.
> In IDL, this is a rather verbose construct:
> {code}
> union {null, string} optionalName = null;
> {code}
> Wish: add Kotlin style optional types like this:
> {code}
> string? optionalName = null;
> {code}
> The resulting schema should be identical; it's only a syntax change.
> Note: it would be nice (but not required) if the syntax would also work if 
> the default value is not null:
> {code}
> string? optionalName = "Jane Doe";
> {code}



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