> For the complete documentation index, see [llms.txt](https://docs.lenses.io/latest/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.lenses.io/latest/devx/5.5/user-guide/cli/admin/schemas.md).

# Schemas

## View all schemas <a href="#view-all-schemas" id="view-all-schemas"></a>

View the current schemas registered:

```bash
lenses-cli schemas --unwrap [--output json/table/yaml [--query] [--no-pretty]]
```

{% hint style="info" %}
The *--unwrap* flag is optional, prints only the names separated by new line
{% endhint %}

## View a schema <a href="#view-a-schema" id="view-a-schema"></a>

Schemas can be filtered by name:

```bash
lenses-cli schema --name="sea_vessel_position_reports-value"
```

## View schema versions <a href="#view-schema-versions" id="view-schema-versions"></a>

Schemas versions can be viewed filtered by name:

```bash
lenses-cli schema versions --name="sea_vessel_position_reports-value"
# view by version
lenses-cli schema --name="sea_vessel_position_reports-value" --version="latest"
```

## View schema compatibility levels <a href="#view-schema-compatibility-levels" id="view-schema-compatibility-levels"></a>

Schema compatibility levels can be viewed and filtered by name:

```bash
lenses-cli schema compatibility --name="register1
```

## Delete schemas <a href="#delete-schemas" id="delete-schemas"></a>

Delete all versions of a schema by name:

```bash
lenses-cli schema delete --name="coyote_test_02"
```

## Delete schemas by version <a href="#delete-schemas-by-version" id="delete-schemas-by-version"></a>

Delete a specific version of a schema:

```bash
# (defaults to "latest" if not passed)
lenses-cli schema delete-version --name="register1" --version=2
```

## Change the compatibility of a Schema <a href="#change-compatibility-of-a-schema" id="change-compatibility-of-a-schema"></a>

Change the compatibility level of a schema:

```bash
lenses-cli schema compatibility  set FULL --name="register1"
```

## Register a schema <a href="#register-a-schema" id="register-a-schema"></a>

Register a new schema for a name/subject by the command line or file:

```bash
lenses-cli schema register \
  --name="schemaName" \
  --avro="{ \"type\": \"string\" }"
```

Register by file:

```bash
lenses-cli schema register ./schema.yaml
```

**schema.yaml**:

```yaml
name: schemaName
avroSchema: |-
  {
    "type": "record",
    "name": "evolution",
    "namespace": "io.lenses",
    "doc": "This is a sample AVRO schema to get you started. Please edit",
    "fields": [
      {
       "name": "name",
       "type": "string"
      },
      {
       "name": "number1",
       "type": "int"
      },
      {
       "name": "number2",
       "type": "float"
      }
    ]
   }  
```


---

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