# DROP ENTITY

## Syntax <a href="#synopsis" id="synopsis"></a>

```sql
DROP ENTITY fully_qualified_entity_name
[IN STORE store_name];
```

## Description <a href="#description" id="description"></a>

Drops an entity from the current [store](https://docs.deltastream.io/overview/core-concepts/store) or a provided store name. You cannot drop an entity if any relations are defined that depend on it. But you can drop an entity outside of the DeltaStream platform. In this case the relations and queries that depend on it will fail to progress.

See [use](https://docs.deltastream.io/reference/sql-syntax/command/use "mention") for changing the current store.

{% hint style="warning" %}
**Important** `DROP ENTITY` cannot be undone. Use it with care!
{% endhint %}

### Arguments <a href="#parameters" id="parameters"></a>

#### fully\_qualified\_entity\_name

The full name of the entity to describe.

#### IN STORE store\_name

Optionally, this specifies the store from which the entity should be dropped. If the name is case sensitive you must wrap it in double quotes; otherwise the system uses the lower case name.

## Examples

#### Drop a Kafka topic in the current Kafka Store

The following drops a Kafka topic from the current `kafka_store` store. Note the store name:

```sh
demodb.public/kafka_store# LIST ENTITIES;
+--------------+----------+
|  Name        |  Is Leaf |
+==============+==========+
| pageviews    | true     |
+--------------+----------+
| pageviews_pb | true     |
+--------------+----------+
| users        | true     |
+--------------+----------+
demodb.public/kafka_store# DROP ENTITY "users";
+--------+----------+----------+------------------------------------------+
|  Type  |  Name    |  Command |  Summary                                 |
+========+==========+==========+==========================================+
| entity | users    | DROP     | entity "users" was successfully          |
|        |          |          | dropped from store "kafka_store"         |
+--------+----------+----------+------------------------------------------+
demodb.public/kafka_store# LIST ENTITIES;
+--------------+----------+
|  Name        |  Is Leaf |
+==============+==========+
| pageviews    | true     |
+--------------+----------+
| pageviews_pb | true     |
+--------------+----------+
```

#### Drop a Kinesis data stream in a specific store

The following drops a Kinesis data stream in the store `AltStore`, which is also provided to the commands [list-entities](https://docs.deltastream.io/reference/sql-syntax/command/list-entities "mention") and [drop-entity](https://docs.deltastream.io/reference/sql-syntax/ddl/drop-entity "mention") for context:

```sh
demodb.public/demostore# LIST ENTITIES IN STORE "AltStore";
+--------------+----------+
|  Name        |  Is Leaf |
+==============+==========+
| Shipments    | true     |
+--------------+----------+
| reviews      | true     |
+--------------+----------+
demodb.public/demostore# DROP ENTITY "Shipments" IN STORE "AltStore";
+--------+------------+----------+------------------------------------------+
|  Type  |  Name      |  Command |  Summary                                 |
+========+============+==========+==========================================+
| entity | Shipments  | DROP     | entity "Shipments" was successfully      |
|        |            |          | dropped from store "AltStore"            |
+--------+------------+----------+------------------------------------------+
demodb.public/demostore# LIST ENTITIES IN STORE "AltStore";
+--------------+----------+
|  Name        |  Is Leaf |
+==============+==========+
| reviews      | true     |
+--------------+----------+
```

#### Drop a Snowflake database

```sh
demodb.public/sfstore# LIST ENTITIES;
+-----------------+------------+
|  Name           |  Is Leaf   |
+=================+============+
| MY_SNOWFLAKE_DB | false      |
+-----------------+------------+
| SNOWFLAKE       | false      |
+-----------------+------------+
| SNOWFLAKE_SAMPL | false      |
| E_DATA          |            |
+-----------------+------------+
demodb.public/sfstore# DROP ENTITY "MY_SNOWFLAKE_DB";
+------------+-----------------+------------+------------------------------------------+
|  Type      |  Name           |  Command   |  Summary                                 |
+============+=================+============+==========================================+
| entity     | MY_SNOWFLAKE_DB | DROP       | entity "MY_SNOWFLAKE_DB" was             |
|            |                 |            | successfully dropped from store          |
|            |                 |            | "sfstore"                                |
+------------+-----------------+------------+------------------------------------------+
demodb.public/sfstore# LIST ENTITIES;
+-----------------+------------+
|  Name           |  Is Leaf   |
+=================+============+
| SNOWFLAKE       | false      |
+-----------------+------------+
| SNOWFLAKE_SAMPL | false      |
| E_DATA          |            |
+-----------------+------------+
```

#### Drop a Snowflake schema

```sh
demodb.public/sfstore# LIST ENTITIES IN "DELTA_STREAMING";
+---------------------+------------+
|  Name               |  Is Leaf   |
+=====================+============+
| MY_STREAMING_SCHEMA | false      |
+---------------------+------------+
| PUBLIC              | false      |
+---------------------+------------+  
demodb.public/sfstore# DROP ENTITY "DELTA_STREAMING"."MY_SCHEMA";
+------------+---------------------------+------------+------------------------------------------+
|  Type      |  Name                     |  Command   |  Summary                                 |
+============+===========================+============+==========================================+
| entity     | DELTA_STREAMING.MY_SCHEMA | DROP       | entity "DELTA_STREAMING.MY_SCHEMA" was   |
|            |                           |            | successfully dropped from store          |
|            |                           |            | "sfstore"                                |
+------------+---------------------------+------------+------------------------------------------+
demodb.public/sfstore# LIST ENTITIES IN "DELTA_STREAMING";
+---------------------+------------+
|  Name               |  Is Leaf   |
+=====================+============+
| PUBLIC              | false      |
+---------------------+------------+              
```

#### Drop a Snowflake table

```sh
demodb.public/sfstore# LIST ENTITIES IN "DELTA_STREAMING"."PUBLIC";
+---------------------+------------+
|  Name               |  Is Leaf   |
+=====================+============+
| STREAM_DATA_TBL     | true       |
+---------------------+------------+
| sf_pv_table         | true       |
+---------------------+------------+      
demodb.public/sfstore# DROP ENTITY "DELTA_STREAMING"."PUBLIC".sf_pv_table;
+------------+---------------------------+------------+------------------------------------------+
|  Type      |  Name                     |  Command   |  Summary                                 |
+============+===========================+============+==========================================+
| entity     | DELTA_STREAMING.MY_SCHEMA | DROP       | entity "DELTA_STREAMING.PUBLIC." was     |
|            |                           |            | successfully dropped from store          |
|            |                           |            | "sfstore"                                |
+------------+---------------------------+------------+------------------------------------------+
demodb.public/sfstore# LIST ENTITIES IN "DELTA_STREAMING"."PUBLIC";
+---------------------+------------+
|  Name               |  Is Leaf   |
+=====================+============+
| STREAM_DATA_TBL     | true       |
+---------------------+------------+ 
```

#### Drop a Databricks catalog

This example drops the catalog `catalog1` from the Databricks store `databricks_store`, which in turn drops all of its sub-entities as well:

```sh
demodb.public/databricks_store# LIST ENTITIES;
+------------+------------+
|  Name      |  Is Leaf   |
+============+============+
| catalog1   | false      |
+------------+------------+
| main       | false      |
+------------+------------+
| system     | false      |
+------------+------------+
demodb.public/databricks_store# DROP ENTITY catalog1;
+------------+------------+------------+------------------------------------------+
|  Type      |  Name      |  Command   |  Summary                                 |
+============+============+============+==========================================+
| entity     | catalog1   | DROP       | entity "catalog1" was successfully       |
|            |            |            | dropped from store                       |
|            |            |            | "databricks_store"                       |
+------------+------------+------------+------------------------------------------+
demodb.public/databricks_store# LIST ENTITIES;
+------------+------------+
|  Name      |  Is Leaf   |
+============+============+
| main       | false      |
+------------+------------+
| system     | false      |
+------------+------------+
```

#### Drop a Databricks schema

```sh
demodb.public/databricks_store# LIST ENTITIES in catalog1;
+--------------------+------------+
|  Name              |  Is Leaf   |
+====================+============+
| default            | false      |
+--------------------+------------+
| information_schema | false      |
+--------------------+------------+
demodb.public/databricks_store# DROP ENTITY catalog1."default";
+------------+------------------+------------+------------------------------------------+
|  Type      |  Name            |  Command   |  Summary                                 |
+============+==================+============+==========================================+
| entity     | catalog1.default | DROP       | entity "catalog1.default" was            |
|            |                  |            | successfully dropped from store          |
|            |                  |            | "databricks_store"                       |
+------------+------------------+------------+------------------------------------------+    
demodb.public/databricks_store# LIST ENTITIES in catalog1;
+--------------------+------------+
|  Name              |  Is Leaf   |
+====================+============+
| information_schema | false      |
+--------------------+------------+ 
```

#### Drop a Databricks table

```sh
demodb.public/databricks_store# LIST ENTITIES IN catalog1.schema1;
+--------------------+------------+
|  Name              |  Is Leaf   |
+====================+============+
| pageviews          | true       |
| pv_agg             | true       |
+--------------------+------------+ 
demodb.public/databricks_store# DROP ENTITY catalog1.schema1.pageviews;
+------------+------------------+------------+------------------------------------------+
|  Type      |  Name            |  Command   |  Summary                                 |
+============+==================+============+==========================================+
| entity     | catalog1.default | DROP       | entity "catalog1.schema1.pageviews" was  |
|            |                  |            | successfully dropped from store          |
|            |                  |            | "databricks_store"                       |
+------------+------------------+------------+------------------------------------------+    
demodb.public/databricks_store# LIST ENTITIES IN catalog1.schema1;
+--------------------+------------+
|  Name              |  Is Leaf   |
+====================+============+
| pv_agg             | true       |
+--------------------+------------+ 
```