Container.GetItemQueryIterator Método

Origem:

Container.cs

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)

Parâmetros de tipo

Parâmetros

Retornos

Um iterador para percorrer os itens.

Exemplos

1. Criar uma consulta para obter todo o ToDoActivity que tem um custo maior que 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);
        }
    }
}

2. Crie um FeedIterator para obter toda a 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); 
        }
    }
}

Origem:

Container.cs

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)

Parâmetros de tipo

Parâmetros

Retornos

Um iterador para percorrer os itens.

Exemplos

Criar uma consulta para obter todo o ToDoActivity que tem um custo maior que 9000 para a partição especificada

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); 
        }
    }
}

Comentários

A consulta como um fluxo dá suporte apenas a consultas de partição única

Origem:

Container.cs

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)

Parâmetros de tipo

Parâmetros

Retornos

Um iterador para percorrer os itens.

Exemplos

Criar uma consulta para obter todo o ToDoActivity que tem um custo maior que 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); 
        }
    }
}