You can access the same column information about the results of a query that you can for table schemas. See Columns for the columns returned.

Retrieving Result Set Metadata

You can use the GetSchemaTable method of the GoogleCloudStorageDataReader to retrieve result set metadata. Call GetSchemaTable after calling ExecuteReader.

Each row of the DataTable describes a column in the query's result.

C#

string connectionString = "InitiateOAuth=GETANDREFRESH;ProjectId='project1';";

using (GoogleCloudStorageConnection conn = new GoogleCloudStorageConnection(connectionString)) {
  GoogleCloudStorageCommand cmd = new GoogleCloudStorageCommand("SELECT * FROM Buckets WHERE Name = 'TestBucket'", conn);
  GoogleCloudStorageDataReader rdr = cmd.ExecuteReader();
  DataTable schemaTable = rdr.GetSchemaTable();
  foreach (DataRow row in schemaTable.Rows) {
    foreach (DataColumn col in schemaTable.Columns) {
      Console.WriteLine("{0}: {1}", col.ColumnName, row[col]);
    }
  }
}

VB.NET

Dim connectionString As String = "InitiateOAuth=GETANDREFRESH;ProjectId='project1';"

Using conn As New GoogleCloudStorageConnection(connectionString)
  Dim cmd As New GoogleCloudStorageCommand("SELECT * FROM Buckets WHERE Name = 'TestBucket'", conn)
  Dim rdr As GoogleCloudStorageDataReader = cmd.ExecuteReader()
  Dim schemaTable As DataTable = rdr.GetSchemaTable()
  For Each row As DataRow In schemaTable.Rows
    For Each col As DataColumn In schemaTable.Columns
      Console.WriteLine("{0}: {1}", col.ColumnName, row(col))
    Next
  Next
End Using