.alter table policy sharding command
Applies to: ✅ Azure Data Explorer
Use this command to change the table sharding policy. Use the sharding policy to manage data sharding for databases and tables.
The sharding policy defines if and how Extents (data shards) should be sealed. When a database is created, it contains the default data sharding policy. This policy is inherited by all tables created in the database (unless the policy is explicitly overridden at the table level).
Permissions
You must have at least Table Admin permissions to run this command.
Syntax
.alter table TableName policy sharding PolicyObject
Learn more about syntax conventions.
Parameters
| Name | Type | Required | Description |
|---|---|---|---|
| TableName | string |
✔️ | The name of the table. |
| PolicyObject | string |
✔️ | A serialized policy object. For more information, see sharding policy. |
Returns
Returns a JSON representation of the policy.
Example
The following command returns the updated extents sharding policy for the table.
.alter table MyTable policy sharding
```
{
"MaxRowCount" : 750000,
"MaxExtentSizeInMb" : 1024,
"MaxOriginalSizeInMb" : 2048
}
```