PYTHON-2859 Add BSON Binary subtype 7 (mongodb#763)

Author: juliusgeo

bson/binary.py

@@ -169,6 +169,12 @@ class UuidRepresentation:
 """BSON binary subtype for an MD5 hash.
 """
 
+COLUMN_SUBTYPE = 7
+"""BSON binary subtype for columns.
+
+.. versionadded:: 4.0
+"""
+
 USER_DEFINED_SUBTYPE = 128
 """BSON binary subtype for any user defined structure.
 """

doc/api/bson/binary.rst

@@ -14,6 +14,7 @@
    .. autodata:: JAVA_LEGACY
    .. autodata:: CSHARP_LEGACY
    .. autodata:: MD5_SUBTYPE
+   .. autodata:: COLUMN_SUBTYPE
    .. autodata:: USER_DEFINED_SUBTYPE
 
    .. autoclass:: UuidRepresentation