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# Namespace Microsoft.SqlTools.ServiceLayer.QueryExecution

### Classes

#### Batch

This class represents a batch within a query

#### Query

Internal representation of an active query

#### QueryExecutionService

Service for executing queries

#### ResultSet

Class that represents a resultset the was generated from a query. Contains logic for storing and retrieving results. Is contained by a Batch class.

### Delegates

#### Batch.BatchAsyncEventHandler

Asynchronous handler for when batches are completed

#### Query.QueryAsyncErrorEventHandler

Delegate type for callback when a query connection fails

#### Query.QueryAsyncEventHandler

Delegate type for callback when a query completes or fails

#### ResultSet.ResultSetAsyncEventHandler

Asynchronous handler for when a resultset has completed