1 files changed, 61 insertions, 0 deletions
diff --git a/lib/sqlalchemy/sql/operators.py b/lib/sqlalchemy/sql/operators.py
new file mode 100644
index 000000000..b8aca3d26
--- /dev/null
+++ b/lib/sqlalchemy/sql/operators.py
@@ -0,0 +1,61 @@
+"""define opeators used in SQL expressions"""
+
+from operator import and_, or_, inv, add, mul, sub, div, mod, truediv, lt, le, ne, gt, ge, eq
+
+def from_():
+    raise NotImplementedError()
+
+def as_():
+    raise NotImplementedError()
+
+def exists():
+    raise NotImplementedError()
+
+def is_():
+    raise NotImplementedError()
+
+def isnot():
+    raise NotImplementedError()
+
+def like_op(a, b):
+    return a.like(b)
+
+def notlike_op(a, b):
+    raise NotImplementedError()
+
+def ilike_op(a, b):
+    return a.ilike(b)
+
+def notilike_op(a, b):
+    raise NotImplementedError()
+
+def between_op(a, b):
+    return a.between(b)
+
+def in_op(a, b):
+    return a.in_(*b)
+
+def notin_op(a, b):
+    raise NotImplementedError()
+
+def distinct_op(a):
+    return a.distinct()
+
+def startswith_op(a, b):
+    return a.startswith(b)
+
+def endswith_op(a, b):
+    return a.endswith(b)
+
+def comma_op(a, b):
+    raise NotImplementedError()
+
+def concat_op(a, b):
+    return a.concat(b)
+
+def desc_op(a):
+    return a.desc()
+
+def asc_op(a):
+    return a.asc()
+