| --- |
| id: functions-develop-schema-registry |
| title: Use schema registry |
| sidebar_label: "Use schema registry" |
| description: Learn to develop functions using schema registry in Pulsar. |
| --- |
| |
| Pulsar has a built-in [schema registry](schema-overview.md) and is bundled with popular [schema types](schema-understand.md#schema-type). Pulsar Functions can leverage the existing schema information from input topics and derive the input type. The schema registry applies to output topics as well. |
| |
| The following table outlines the supportability of schema types in Pulsar Functions. |
| |
| | Schema Type | Java Function | Python Function | Go Function | |
| |----------------|---------------|-----------------|-------------| |
| | String | ✅ | ✅ | | |
| | Avro | ✅ | ✅ | | |
| | JSON | ✅ | ✅ | | |
| | Protobuf | ✅ | | | |
| | ProtobufNative | ✅ | | | |
| | Key/Value | ✅ | | | |
| | AUTO_PRODUCE | ✅ | | | |
| | AUTO_CONSUME | ✅ | | | |
| |
| For more code examples, see [Java Functions](https://github.com/apache/pulsar/blob/master/pulsar-functions/java-examples/src/main/java/org/apache/pulsar/functions/api/examples/AutoSchemaFunction.java) and [Python Functions]( https://github.com/apache/pulsar/blob/master/pulsar-functions/python-examples/). |
