Fix flowdetails meta size

meta field in flowdetails is defined as a JSON data type, but its data
type is 'text' in mysql, which is limited to 64kbytes. JSON data type
should have the same size as a LONGTEXT.

Closes-Bug: #1926304

Change-Id: I9f89badfc697f0f26245ca7f4c22d62e220be5f9

1 files changed, 34 insertions, 0 deletions

diff --git a/taskflow/persistence/backends/sqlalchemy/alembic/versions/6df9422fcb43_fix_flowdetails_meta_size.py b/taskflow/persistence/backends/sqlalchemy/alembic/versions/6df9422fcb43_fix_flowdetails_meta_size.py
new file mode 100644
index 0000000..4adb945
--- /dev/null
+++ b/taskflow/persistence/backends/sqlalchemy/alembic/versions/6df9422fcb43_fix_flowdetails_meta_size.py
@@ -0,0 +1,34 @@
+#    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.
+
+"""fix flowdetails meta size
+
+Revision ID: 6df9422fcb43
+Revises: 0bc3e1a3c135
+Create Date: 2021-04-27 14:51:53.618249
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '6df9422fcb43'
+down_revision = '0bc3e1a3c135'
+
+from alembic import op
+from sqlalchemy.dialects import mysql
+
+
+def upgrade():
+    bind = op.get_bind()
+    engine = bind.engine
+    if engine.name == 'mysql':
+        op.alter_column('flowdetails', 'meta', type_=mysql.LONGTEXT,
+                        existing_nullable=True)