Add a migration to create the scheduled_jobs table

This commit adds a required migration and additionally creates a
new field in the model called 'scheduler_id'.

Change-Id: I5436e34dec032b9028221e3e87c8d88a9b207e23

mistral/db/sqlalchemy/migration/alembic_migrations/versions/034_add_scheduled_jobs_table.py

@@ -0,0 +1,54 @@
+# Copyright 2019 OpenStack Foundation.
+#
+# 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.
+
+"""Create scheduled jobs table.
+
+Revision ID: 034
+Revises: 033
+Create Date: 2019-07-01 17:38:41.153354
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+from mistral.db.sqlalchemy import types as st
+
+# revision identifiers, used by Alembic.
+revision = '034'
+down_revision = '033'
+
+
+def upgrade():
+    op.create_table(
+        'scheduled_jobs_v2',
+        sa.Column('created_at', sa.DateTime(), nullable=True),
+        sa.Column('updated_at', sa.DateTime(), nullable=True),
+        sa.Column('id', sa.String(length=36), nullable=False),
+        sa.Column('run_after', sa.Integer(), nullable=True),
+        sa.Column(
+            'target_factory_func_name',
+            sa.String(length=200),
+            nullable=True
+        ),
+        sa.Column('func_name', sa.String(length=80), nullable=True),
+        sa.Column('func_args', st.JsonEncoded(), nullable=True),
+        sa.Column('func_arg_serializers', st.JsonEncoded(), nullable=True),
+        sa.Column('auth_ctx', st.JsonEncoded(), nullable=True),
+        sa.Column('execute_at', sa.DateTime(), nullable=False),
+        sa.Column('captured_at', sa.DateTime(), nullable=True),
+        sa.Column('key', sa.String(length=250), nullable=True),
+
+        sa.PrimaryKeyConstraint('id'),
+    )

mistral/db/v2/sqlalchemy/models.py

@@ -460,16 +460,6 @@ class ScheduledJob(mb.MistralModelBase):
     key = sa.Column(sa.String(250), nullable=True)
 
 
-sa.Index(
-    '%s_execute_at' % ScheduledJob.__tablename__,
-    ScheduledJob.execute_at
-)
-sa.Index(
-    '%s_captured_at' % ScheduledJob.__tablename__,
-    ScheduledJob.captured_at
-)
-
-
 class Environment(mb.MistralSecureModelBase):
     """Contains environment variables for workflow execution."""