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.alter-merge table policy ingestionbatching command

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Applies to: ✅ Microsoft Fabric ✅ Azure Data Explorer

Sets the table's ingestion batching policy to determine when data aggregation stops and a batch is sealed and ingested. The ingestion batching policy applies to queued ingestion.

If the policy isn't set for a table, the database-level policy applies. If the policy isn't set at the database-level, the default values apply.

Permissions

You must have at least Table Admin permissions to run this command.

Defaults and limits

See defaults and limits.

Syntax

.alter-merge table [ DatabaseName.]TableName policy ingestionbatching PolicyObject

.alter-merge tables (Table1 , Table2 [,...]) policy ingestionbatching PolicyObject

Learn more about syntax conventions.

Parameters

Name Type Required Description
TableName string ✔️ The name of the table to alter.
DatabaseName string The name of the database. When you run the command from the database context that contains the table to alter, DatabaseName is not required.
PolicyObject string ✔️ A serialized JSON policy object. See ingestion batching policy.

Examples

The following command sets a batch ingress data time of 30 seconds, for 500 files, or 1 GB, whichever comes first.

.alter-merge table MyDatabase.MyTable policy ingestionbatching
```
{
    "MaximumBatchingTimeSpan" : "00:00:30",
    "MaximumNumberOfItems" : 500,
    "MaximumRawDataSizeMB": 1024
}
```

The following command sets a batch ingress data time of 45 seconds, for 450 files, or the previous value of MaximumRawDataSizeMB, whichever comes first.

.alter-merge table MyDataMyDatabase.MyTable policy ingestionbatching
```
{
    "MaximumBatchingTimeSpan" : "00:00:45",
    "MaximumNumberOfItems" : 450
}
```

Note

If you specify only some parameters of a PolicyObject, they will replace the values in the current policy, while the other parameters will remain intact. To set the default values for unspecified parameters, use the alter command command.

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