Borra un grupo familiar

Borra una familia de columnas.

Muestra de código

C++

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

Para autenticarte en Bigtable, configura las credenciales predeterminadas de la aplicación. Si deseas obtener más información, consulta Configura la autenticación para un entorno de desarrollo local.

namespace cbt = ::google::cloud::bigtable;
namespace cbta = ::google::cloud::bigtable_admin;
using ::google::bigtable::admin::v2::ModifyColumnFamiliesRequest;
using ::google::cloud::StatusOr;
[](cbta::BigtableTableAdminClient admin, std::string const& project_id,
   std::string const& instance_id, std::string const& table_id,
   std::string const& family_name) {
  std::string table_name = cbt::TableName(project_id, instance_id, table_id);

  ModifyColumnFamiliesRequest::Modification mod;
  mod.set_id(family_name);
  mod.set_drop(true);

  StatusOr<google::bigtable::admin::v2::Table> schema =
      admin.ModifyColumnFamilies(table_name, {std::move(mod)});

  if (!schema) throw std::move(schema).status();
  std::cout << "Schema modified to: " << schema->DebugString() << "\n";
}

C#

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

// Delete a column family.
// Initialize request argument(s).
GcRule maxVersionsRule = new GcRule { MaxNumVersions = 1 };

TableName tableName = new TableName(projectId, instanceId, tableId);

// Modification to update column family
ModifyColumnFamiliesRequest.Types.Modification modification = new ModifyColumnFamiliesRequest.Types.Modification
{
    Drop = true,
    Id = "cf2"
};

ModifyColumnFamiliesRequest request = new ModifyColumnFamiliesRequest
{
    TableName = tableName,
    Modifications = { modification }
};
try
{
    // Make the request
    Table response = bigtableTableAdminClient.ModifyColumnFamilies(request);
    Console.WriteLine("Deleted column family");
}
catch (Exception ex)
{
    Console.WriteLine($"Error deleting column family {ex.Message}");
}

Java

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

// Deletes a column family.
try {
  ModifyColumnFamiliesRequest deleted =
      ModifyColumnFamiliesRequest.of(tableId).dropFamily(COLUMN_FAMILY_2);
  adminClient.modifyFamilies(deleted);
  System.out.printf("Column family %s deleted successfully%n", COLUMN_FAMILY_2);
} catch (NotFoundException e) {
  System.err.println("Failed to delete a non-existent column family: " + e.getMessage());
}

Node.js

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

// Delete a column family
await family.delete();
console.log(`${family.id} deleted successfully\n`);

PHP

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

use Google\Cloud\Bigtable\Admin\V2\Client\BigtableTableAdminClient;
use Google\Cloud\Bigtable\Admin\V2\ModifyColumnFamiliesRequest;
use Google\Cloud\Bigtable\Admin\V2\ModifyColumnFamiliesRequest\Modification;

/**
 * Delete a column family in a table
 *
 * @param string $projectId The Google Cloud project ID
 * @param string $instanceId The ID of the Bigtable instance
 * @param string $tableId The ID of the table where the column family needs to be deleted
 * @param string $familyId The ID of the column family to be deleted
 */
function delete_family(
    string $projectId,
    string $instanceId,
    string $tableId,
    string $familyId = 'cf2'
): void {
    $tableAdminClient = new BigtableTableAdminClient();
    $tableName = $tableAdminClient->tableName($projectId, $instanceId, $tableId);

    print("Delete a column family $familyId..." . PHP_EOL);
    // Delete a column family
    $columnModification = new Modification();
    $columnModification->setId($familyId);
    $columnModification->setDrop(true);
    $modifyColumnFamiliesRequest = (new ModifyColumnFamiliesRequest())
        ->setName($tableName)
        ->setModifications([$columnModification]);
    $tableAdminClient->modifyColumnFamilies($modifyColumnFamiliesRequest);
    print("Column family $familyId deleted successfully." . PHP_EOL);
}

Python

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

print("Delete a column family cf2...")
# Delete a column family
column_family2.delete()
print("Column family cf2 deleted successfully.")

Ruby

Para obtener información sobre cómo instalar y usar la biblioteca cliente de Bigtable, consulta Bibliotecas cliente de Bigtable.

column_families = table.column_families do |cfs|
  cfs.delete "cf2"
end

¿Qué sigue?

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