sql: add buildset uuid column

This change adds a uuid column to the buildset table to record the
buildset uuid.

Change-Id: Ie79ce738caa028035d5b625b57296133311986dd

tests/unit/test_connection.py

@@ -74,7 +74,7 @@ class TestSQLConnection(ZuulDBTestCase):
         buildset_table = table_prefix + 'zuul_buildset'
         build_table = table_prefix + 'zuul_build'
 
-        self.assertEqual(14, len(insp.get_columns(buildset_table)))
+        self.assertEqual(15, len(insp.get_columns(buildset_table)))
         self.assertEqual(10, len(insp.get_columns(build_table)))
 
     def test_sql_tables_created(self):

zuul/driver/sql/alembic/versions/649ce63b5fe5_add_buildset_uuid.py

@@ -0,0 +1,37 @@
+# Licensed 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.
+
+"""Add uuid to buldset
+
+Revision ID: 649ce63b5fe5
+Revises: ea2bae776723
+Create Date: 2019-01-11 06:17:40.042738
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '649ce63b5fe5'
+down_revision = 'ea2bae776723'
+branch_labels = None
+depends_on = None
+
+from alembic import op
+import sqlalchemy as sa
+
+
+def upgrade(table_prefix=''):
+    op.add_column(
+        table_prefix + 'zuul_buildset', sa.Column('uuid', sa.String(36)))
+
+
+def downgrade():
+    raise Exception("Downgrades not supported")

zuul/driver/sql/sqlconnection.py

@@ -176,6 +176,7 @@ class SQLConnection(BaseConnection):
         class BuildSetModel(Base):
             __tablename__ = self.table_prefix + BUILDSET_TABLE
             id = sa.Column(sa.Integer, primary_key=True)
+            uuid = sa.Column(sa.String(36))
             zuul_ref = sa.Column(sa.String(255))
             pipeline = sa.Column(sa.String(255))
             project = sa.Column(sa.String(255))

zuul/driver/sql/sqlreporter.py

@@ -56,6 +56,7 @@ class SQLReporter(BaseReporter):
 
         with self.connection.getSession() as db:
             db_buildset = db.createBuildSet(
+                uuid=item.current_build_set.uuid,
                 tenant=item.pipeline.tenant.name,
                 pipeline=item.pipeline.name,
                 project=item.change.project.name,