Delen via


Container.GetItemQueryIterator Method

Definition

Overloads

GetItemQueryIterator<T>(String, String, QueryRequestOptions)

This method creates a query for items under a container in an Azure Cosmos database using a SQL statement. It returns a FeedIterator.

GetItemQueryIterator<T>(FeedRange, QueryDefinition, String, QueryRequestOptions)

This method creates a query for items under a container in an Azure Cosmos database using a SQL statement with parameterized values. It returns a FeedIterator. For more information on preparing SQL statements with parameterized values, please see QueryDefinition.

GetItemQueryIterator<T>(QueryDefinition, String, QueryRequestOptions)

This method creates a query for items under a container in an Azure Cosmos database using a SQL statement with parameterized values. It returns a FeedIterator. For more information on preparing SQL statements with parameterized values, please see QueryDefinition.

GetItemQueryIterator<T>(String, String, QueryRequestOptions)

Source:
Container.cs

This method creates a query for items under a container in an Azure Cosmos database using a SQL statement. It returns a FeedIterator.

public abstract Microsoft.Azure.Cosmos.FeedIterator<T> GetItemQueryIterator<T> (string queryText = default, string continuationToken = default, Microsoft.Azure.Cosmos.QueryRequestOptions requestOptions = default);
abstract member GetItemQueryIterator : string * string * Microsoft.Azure.Cosmos.QueryRequestOptions -> Microsoft.Azure.Cosmos.FeedIterator<'T>
Public MustOverride Function GetItemQueryIterator(Of T) (Optional queryText As String = Nothing, Optional continuationToken As String = Nothing, Optional requestOptions As QueryRequestOptions = Nothing) As FeedIterator(Of T)

Type Parameters

T

Parameters

queryText
String

The Cosmos SQL query text.

continuationToken
String

(Optional) The continuation token in the Azure Cosmos DB service.

requestOptions
QueryRequestOptions

(Optional) The options for the item query request.

Returns

An iterator to go through the items.

Examples

  1. Create a query to get all the ToDoActivity that have a cost greater than 9000
public class ToDoActivity{
    public string id {get; set;}
    public string status {get; set;}
    public int cost {get; set;}
}

using (FeedIterator<ToDoActivity> feedIterator = this.Container.GetItemQueryIterator<ToDoActivity>(
    "select * from ToDos t where t.cost > 9000",
    null,
    new QueryRequestOptions() { PartitionKey = new PartitionKey("Error")}))
{
    while (feedIterator.HasMoreResults)
    {
        foreach(var item in await feedIterator.ReadNextAsync())
        {
            Console.WriteLine(item.cost);
        }
    }
}
  1. Create a FeedIterator to get all the ToDoActivity.
public class ToDoActivity{
    public string id {get; set;}
    public string status {get; set;}
    public int cost {get; set;}
}

using (FeedIterator<ToDoActivity> feedIterator = this.Container.GetItemQueryIterator<ToDoActivity>(
    null,
    null,
    new QueryRequestOptions() { PartitionKey = new PartitionKey("Error")}))
{
    while (feedIterator.HasMoreResults)
    {
        foreach(var item in await feedIterator.ReadNextAsync())
        {
            Console.WriteLine(item.cost); 
        }
    }
}

Applies to

GetItemQueryIterator<T>(FeedRange, QueryDefinition, String, QueryRequestOptions)

Source:
Container.cs

This method creates a query for items under a container in an Azure Cosmos database using a SQL statement with parameterized values. It returns a FeedIterator. For more information on preparing SQL statements with parameterized values, please see QueryDefinition.

public abstract Microsoft.Azure.Cosmos.FeedIterator<T> GetItemQueryIterator<T> (Microsoft.Azure.Cosmos.FeedRange feedRange, Microsoft.Azure.Cosmos.QueryDefinition queryDefinition, string continuationToken = default, Microsoft.Azure.Cosmos.QueryRequestOptions requestOptions = default);
abstract member GetItemQueryIterator : Microsoft.Azure.Cosmos.FeedRange * Microsoft.Azure.Cosmos.QueryDefinition * string * Microsoft.Azure.Cosmos.QueryRequestOptions -> Microsoft.Azure.Cosmos.FeedIterator<'T>
Public MustOverride Function GetItemQueryIterator(Of T) (feedRange As FeedRange, queryDefinition As QueryDefinition, Optional continuationToken As String = Nothing, Optional requestOptions As QueryRequestOptions = Nothing) As FeedIterator(Of T)

Type Parameters

T

Parameters

feedRange
FeedRange

A FeedRange obtained from GetFeedRangesAsync(CancellationToken).

queryDefinition
QueryDefinition

The Cosmos SQL query definition.

continuationToken
String

(Optional) The continuation token in the Azure Cosmos DB service.

requestOptions
QueryRequestOptions

(Optional) The options for the item query request.

Returns

An iterator to go through the items.

Examples

Create a query to get all the ToDoActivity that have a cost greater than 9000 for the specified partition

public class ToDoActivity{
    public string id {get; set;}
    public string status {get; set;}
    public int cost {get; set;}
}
IReadOnlyList<FeedRange> feedRanges = await this.Container.GetFeedRangesAsync();
// Distribute feedRanges across multiple compute units and pass each one to a different iterator
QueryDefinition queryDefinition = new QueryDefinition("select * from ToDos t where t.cost > @expensive")
    .WithParameter("@expensive", 9000);
using (FeedIterator<ToDoActivity> feedIterator = this.Container.GetItemQueryIterator<ToDoActivity>(
    feedRanges[0],
    queryDefinition,
    null,
    new QueryRequestOptions() { }))
{
    while (feedIterator.HasMoreResults)
    {
        foreach(var item in await feedIterator.ReadNextAsync())
        {
            Console.WriteLine(item.cost); 
        }
    }
}

Remarks

Query as a stream only supports single partition queries

Applies to

GetItemQueryIterator<T>(QueryDefinition, String, QueryRequestOptions)

Source:
Container.cs

This method creates a query for items under a container in an Azure Cosmos database using a SQL statement with parameterized values. It returns a FeedIterator. For more information on preparing SQL statements with parameterized values, please see QueryDefinition.

public abstract Microsoft.Azure.Cosmos.FeedIterator<T> GetItemQueryIterator<T> (Microsoft.Azure.Cosmos.QueryDefinition queryDefinition, string continuationToken = default, Microsoft.Azure.Cosmos.QueryRequestOptions requestOptions = default);
abstract member GetItemQueryIterator : Microsoft.Azure.Cosmos.QueryDefinition * string * Microsoft.Azure.Cosmos.QueryRequestOptions -> Microsoft.Azure.Cosmos.FeedIterator<'T>
Public MustOverride Function GetItemQueryIterator(Of T) (queryDefinition As QueryDefinition, Optional continuationToken As String = Nothing, Optional requestOptions As QueryRequestOptions = Nothing) As FeedIterator(Of T)

Type Parameters

T

Parameters

queryDefinition
QueryDefinition

The Cosmos SQL query definition.

continuationToken
String

(Optional) The continuation token in the Azure Cosmos DB service.

requestOptions
QueryRequestOptions

(Optional) The options for the item query request.

Returns

An iterator to go through the items.

Examples

Create a query to get all the ToDoActivity that have a cost greater than 9000

public class ToDoActivity{
    public string id {get; set;}
    public string status {get; set;}
    public int cost {get; set;}
}

QueryDefinition queryDefinition = new QueryDefinition("select * from ToDos t where t.cost > @expensive")
    .WithParameter("@expensive", 9000);
using (FeedIterator<ToDoActivity> feedIterator = this.Container.GetItemQueryIterator<ToDoActivity>(
    queryDefinition,
    null,
    new QueryRequestOptions() { PartitionKey = new PartitionKey("Error")}))
{
    while (feedIterator.HasMoreResults)
    {
        foreach(var item in await feedIterator.ReadNextAsync())
        {
            Console.WriteLine(item.cost); 
        }
    }
}

Applies to