text: """
  Constants specific to the SQL storage portion of the ORM.
  """
  
  import re
  
  # Valid query types (a set is used for speedy lookups). These are (currently)
  # considered SQL-specific; other storage systems may choose to use different
  # lookup types.
  QUERY_TERMS = {
      'exact', 'iexact', 'contains', 'icontains', 'gt', 'gte', 'lt', 'lte', 'in',
      'startswith', 'istartswith', 'endswith', 'iendswith', 'range', 'year',
      'month', 'day', 'week_day', 'hour', 'minute', 'second', 'isnull', 'search',
      'regex', 'iregex',
  }
  
  # Size of each "chunk" for get_iterator calls.
  # Larger values are slightly faster at the expense of more storage space.
  GET_ITERATOR_CHUNK_SIZE = 100
  
  # Namedtuples for sql.* internal use.
  
  # How many results to expect from a cursor.execute call
  MULTI = 'multi'
  SINGLE = 'single'
  CURSOR = 'cursor'
  NO_RESULTS = 'no results'
  
  ORDER_PATTERN = re.compile(r'\?|[-+]?[.\w]+$')
  ORDER_DIR = {
      'ASC': ('ASC', 'DESC'),
      'DESC': ('DESC', 'ASC'),
  }
  
  # SQL join types.
  INNER = 'INNER JOIN'
  LOUTER = 'LEFT OUTER JOIN'
  