+
−import re
+
−
+
−# Valid query types (a dictionary is used for speedy lookups).
+
−QUERY_TERMS = dict([(x, None) for x in (
+
−    'exact', 'iexact', 'contains', 'icontains', 'gt', 'gte', 'lt', 'lte', 'in',
+
−    'startswith', 'istartswith', 'endswith', 'iendswith', 'range', 'year',
+
−    'month', 'day', '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
+
−
+
−# Separator used to split filter strings apart.
+
−LOOKUP_SEP = '__'
+
−
+
−# Constants to make looking up tuple values clearer.
+
−# Join lists (indexes into the tuples that are values in the alias_map
+
−# dictionary in the Query class).
+
−TABLE_NAME = 0
+
−RHS_ALIAS = 1
+
−JOIN_TYPE = 2
+
−LHS_ALIAS = 3
+
−LHS_JOIN_COL = 4
+
−RHS_JOIN_COL = 5
+
−NULLABLE = 6
+
−
+
−# How many results to expect from a cursor.execute call
+
−MULTI = 'multi'
+
−SINGLE = 'single'
+
−
+
−ORDER_PATTERN = re.compile(r'\?|[-+]?[.\w]+$')
+
−ORDER_DIR = {
+
−    'ASC': ('ASC', 'DESC'),
+
−    'DESC': ('DESC', 'ASC')}
+
−
+
−