1 files changed, 36 insertions, 0 deletions
diff --git a/webapp/django/db/models/sql/constants.py b/webapp/django/db/models/sql/constants.py
new file mode 100644
index 0000000000..129a592b31
--- /dev/null
+++ b/webapp/django/db/models/sql/constants.py
@@ -0,0 +1,36 @@
+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
+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')}
+
+