Este tema describe cómo usar el SDK de Tablestore para .NET con el fin de consultar la información de una tabla.
Requisitos previos
Se requiere un cliente inicializado. Para obtener más información, consulte Initialize a Tablestore client.
Método
public DescribeTableResponse DescribeTable(DescribeTableRequest request)Método asíncrono:
public Task<DescribeTableResponse> DescribeTableAsync(DescribeTableRequest request)Código de ejemplo
A continuación se muestra un código de ejemplo que demuestra cómo consultar la información de la tabla test_table.
try
{
var request = new DescribeTableRequest("test_table");
var response = client.DescribeTable(request);
// Table schema information
var tableMeta = response.TableMeta;
Console.WriteLine("* Table name: " + tableMeta.TableName);
Console.WriteLine("* Primary key information");
foreach (var primaryKey in tableMeta.PrimaryKeySchema)
{
Console.WriteLine($"{primaryKey.Item1}:{primaryKey.Item2}");
}
Console.WriteLine("* Predefined column information");
foreach (var definedColumn in tableMeta.DefinedColumnSchema)
{
Console.WriteLine($"{definedColumn.Item1}:{definedColumn.Item2}");
}
// Table configuration information
var tableOptions = response.TableOptions;
Console.WriteLine("* Table configuration information");
Console.WriteLine("Time to live: " + tableOptions.TimeToLive);
Console.WriteLine("Max versions: " + tableOptions.MaxVersions);
Console.WriteLine("Max version offset: " + tableOptions.DeviationCellVersionInSec);
Console.WriteLine("Allow updates: " + tableOptions.AllowUpdate);
// Table Stream information
var streamDetails = response.StreamDetails;
Console.WriteLine("* Whether to enable Stream: " + streamDetails.EnableStream);
if (streamDetails.EnableStream)
Console.WriteLine("Stream expiration time: " + streamDetails.ExpirationTime);
// Table reserved read/write throughput
var reservedThroughputDetails = response.ReservedThroughputDetails;
Console.WriteLine("* Reserved read/write throughput");
Console.WriteLine("Reserved read throughput: " + reservedThroughputDetails.CapacityUnit.Read);
Console.WriteLine("Reserved write throughput: " + reservedThroughputDetails.CapacityUnit.Write);
}
catch (Exception ex)
{
Console.WriteLine($"Describe table failed, exception:{ex.Message}");
}