class SQLite3::Statement

def get_metadata

(potentially) expensive operation.
that this will actually execute the SQL, which means it can be a
A convenience method for obtaining the metadata about the query. Note 
def get_metadata
  @columns = Array.new(column_count) do |column|
    column_name column
  end
  @types = Array.new(column_count) do |column|
    val = column_decltype(column)
    val.nil? ? nil : val.downcase
  end
end