python-postgres
diff --git a/‎postgresql/driver/pg_type.py‎
Lines changed: 16 additions & 0 deletions b/‎postgresql/driver/pg_type.py‎
Lines changed: 16 additions & 0 deletions
diff --git a/‎postgresql/lib/libsys.sql‎
Lines changed: 4 additions & 0 deletions b/‎postgresql/lib/libsys.sql‎
Lines changed: 4 additions & 0 deletions
diff --git a/‎postgresql/types/io/contrib_hstore.py‎
Lines changed: 1 addition & 1 deletion b/‎postgresql/types/io/contrib_hstore.py‎
Lines changed: 1 addition & 1 deletion
@@ -190,3 +190,19 @@ def resolve(self,
 				# Throw warning about type without entry in pg_type?
 				typio = self.strio
 		return typio
+
+	def identify(self, **identity_mappings):
+		"""
+		Explicitly designate the I/O handler for the specified type.
+
+		Primarily used in cases involving UDTs.
+		"""
+		# get them ordered; we process separately, then recombine.
+		id = list(identity_mappings.items())
+		ios = [resolve(x[0]) for x in id]
+		oids = list(self.database.sys.regtypes([x[1] for x in id]))
+
+		self._cache.update([
+			(oid, io if io.__class__ is tuple else io(oid, self))
+			for oid, io in zip(oids, ios)
+		])
@@ -77,6 +77,10 @@ SELECT
 		ORDER BY prepared ASC
 	), ('{}'::text[]))
 
+[regtypes::column]
+SELECT (($1::text[])[i])::regtype::oid AS typoid
+FROM pg_catalog.generate_series(1, array_upper($1::text[], 1)) AS g(i)
+
 [xact_is_prepared::first]
 SELECT TRUE FROM pg_catalog.pg_prepared_xacts WHERE gid::text = $1
 
 
@@ -6,7 +6,7 @@
 
 ##
 # Build the hstore I/O pair for a given typio.
-# It primarily need typio for decode and encode.
+# It primarily needs typio for decode and encode.
 def hstore_factory(oid, typio,
 	unpack_err = "expected {0} items in hstore, but found {1}".format
 ):