diff --git a/superset/connectors/druid/models.py b/superset/connectors/druid/models.py
index 9237a1f715b0d..e9c6029e7720c 100644
--- a/superset/connectors/druid/models.py
+++ b/superset/connectors/druid/models.py
@@ -44,7 +44,9 @@
     Text,
     UniqueConstraint,
 )
+from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.orm import backref, relationship, Session
+from sqlalchemy.sql import expression
 from sqlalchemy_utils import EncryptedType
 
 from superset import conf, db, is_feature_enabled, security_manager
@@ -280,12 +282,16 @@ def refresh(
                 datasource.refresh_metrics()
         session.commit()
 
-    @property
+    @hybrid_property
     def perm(self) -> str:
-        return "[{obj.cluster_name}].(id:{obj.id})".format(obj=self)
+        return f"[{self.cluster_name}].(id:{self.id})"
+
+    @perm.expression  # type: ignore
+    def perm(cls) -> str:  # pylint: disable=no-self-argument
+        return "[" + cls.cluster_name + "].(id:" + expression.cast(cls.id, String) + ")"
 
     def get_perm(self) -> str:
-        return self.perm
+        return self.perm  # type: ignore
 
     @property
     def name(self) -> str:
diff --git a/superset/migrations/versions/a72cb0ebeb22_deprecate_dbs_perm_column.py b/superset/migrations/versions/a72cb0ebeb22_deprecate_dbs_perm_column.py
new file mode 100644
index 0000000000000..4e39b673128ce
--- /dev/null
+++ b/superset/migrations/versions/a72cb0ebeb22_deprecate_dbs_perm_column.py
@@ -0,0 +1,39 @@
+# Licensed to the Apache Software Foundation (ASF) under one
+# or more contributor license agreements.  See the NOTICE file
+# distributed with this work for additional information
+# regarding copyright ownership.  The ASF licenses this file
+# to you under the Apache License, Version 2.0 (the
+# "License"); you may not use this file except in compliance
+# with the License.  You may obtain a copy of the License at
+#
+#   http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing,
+# software distributed under the License is distributed on an
+# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+# KIND, either express or implied.  See the License for the
+# specific language governing permissions and limitations
+# under the License.
+"""deprecate dbs.perm column
+
+Revision ID: a72cb0ebeb22
+Revises: 743a117f0d98
+Create Date: 2020-06-21 19:50:51.630917
+"""
+
+import sqlalchemy as sa
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "a72cb0ebeb22"
+down_revision = "743a117f0d98"
+
+
+def upgrade():
+    with op.batch_alter_table("dbs") as batch_op:
+        batch_op.drop_column("perm")
+
+
+def downgrade():
+    with op.batch_alter_table("dbs") as batch_op:
+        batch_op.add_column(sa.Column("perm", sa.String(1000), nullable=True))
diff --git a/superset/models/core.py b/superset/models/core.py
index 562e9c523d81c..42c43453a0250 100755
--- a/superset/models/core.py
+++ b/superset/models/core.py
@@ -45,10 +45,11 @@
 from sqlalchemy.engine import Dialect, Engine, url
 from sqlalchemy.engine.reflection import Inspector
 from sqlalchemy.engine.url import make_url, URL
+from sqlalchemy.ext.hybrid import hybrid_property
 from sqlalchemy.orm import relationship
 from sqlalchemy.pool import NullPool
 from sqlalchemy.schema import UniqueConstraint
-from sqlalchemy.sql import Select
+from sqlalchemy.sql import expression, Select
 from sqlalchemy_utils import EncryptedType
 
 from superset import app, db_engine_specs, is_feature_enabled, security_manager
@@ -138,7 +139,6 @@ class Database(
         ),
     )
     encrypted_extra = Column(EncryptedType(Text, config["SECRET_KEY"]), nullable=True)
-    perm = Column(String(1000))
     impersonate_user = Column(Boolean, default=False)
     server_cert = Column(EncryptedType(Text, config["SECRET_KEY"]), nullable=True)
     export_fields = [
@@ -641,9 +641,19 @@ def sqlalchemy_uri_decrypted(self) -> str:
     def sql_url(self) -> str:
         return f"/superset/sql/{self.id}/"
 
-    def get_perm(self) -> str:
+    @hybrid_property
+    def perm(self) -> str:
         return f"[{self.database_name}].(id:{self.id})"
 
+    @perm.expression  # type: ignore
+    def perm(cls) -> str:  # pylint: disable=no-self-argument
+        return (
+            "[" + cls.database_name + "].(id:" + expression.cast(cls.id, String) + ")"
+        )
+
+    def get_perm(self) -> str:
+        return self.perm  # type: ignore
+
     def has_table(self, table: Table) -> bool:
         engine = self.get_sqla_engine()
         return engine.has_table(table.table_name, table.schema or None)
diff --git a/superset/security/manager.py b/superset/security/manager.py
index 9a001cfa87d39..3d03ad058bc33 100644
--- a/superset/security/manager.py
+++ b/superset/security/manager.py
@@ -247,7 +247,7 @@ def can_access_database(self, database: Union["Database", "DruidCluster"]) -> bo
         return (
             self.can_access_all_datasources()
             or self.can_access_all_databases()
-            or self.can_access("database_access", database.perm)
+            or self.can_access("database_access", database.perm)  # type: ignore
         )
 
     def can_access_schema(self, datasource: "BaseDatasource") -> bool:
diff --git a/tests/security_tests.py b/tests/security_tests.py
index a36a49998aadd..b4279827cd5a2 100644
--- a/tests/security_tests.py
+++ b/tests/security_tests.py
@@ -352,6 +352,53 @@ def test_set_perm_database(self):
         session.delete(stored_db)
         session.commit()
 
+    def test_hybrid_perm_druid_cluster(self):
+        cluster = DruidCluster(cluster_name="tmp_druid_cluster3")
+        db.session.add(cluster)
+
+        id_ = (
+            db.session.query(DruidCluster.id)
+            .filter_by(cluster_name="tmp_druid_cluster3")
+            .scalar()
+        )
+
+        record = (
+            db.session.query(DruidCluster)
+            .filter_by(perm=f"[tmp_druid_cluster3].(id:{id_})")
+            .one()
+        )
+
+        self.assertEquals(record.get_perm(), record.perm)
+        self.assertEquals(record.id, id_)
+        self.assertEquals(record.cluster_name, "tmp_druid_cluster3")
+        db.session.delete(cluster)
+        db.session.commit()
+
+    def test_hybrid_perm_database(self):
+        database = Database(
+            database_name="tmp_database3", sqlalchemy_uri="sqlite://test"
+        )
+
+        db.session.add(database)
+
+        id_ = (
+            db.session.query(Database.id)
+            .filter_by(database_name="tmp_database3")
+            .scalar()
+        )
+
+        record = (
+            db.session.query(Database)
+            .filter_by(perm=f"[tmp_database3].(id:{id_})")
+            .one()
+        )
+
+        self.assertEquals(record.get_perm(), record.perm)
+        self.assertEquals(record.id, id_)
+        self.assertEquals(record.database_name, "tmp_database3")
+        db.session.delete(database)
+        db.session.commit()
+
     def test_set_perm_slice(self):
         session = db.session
         database = Database(