Migrate DB enum to support bad_dataset

Author: ponyisi

servicex_app/migrations/versions/1.7.3.py

@@ -0,0 +1,43 @@
+"""
+Revision ID: v1_7_3
+Revises: v1_7_1
+Create Date: 2025-10-17
+
+Update transformstatus enum
+"""
+
+from alembic import op
+from sqlalchemy.dialects import postgresql
+
+revision = "v1_7_3"
+down_revision = "v1_7_1"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    with op.get_context().autocommit_block():
+        op.execute("ALTER TYPE transformstatus ADD VALUE 'bad_dataset'")
+
+
+def downgrade():
+    op.execute("UPDATE requests SET status='fatal' WHERE status='bad_dataset'")
+    # painful by comparison
+    old_status_enum_postgres = postgresql.ENUM(
+        "submitted",
+        "pending_lookup",
+        "lookup",
+        "running",
+        "complete",
+        "fatal",
+        "canceled",
+        name="transformstatus_",
+        create_type=False,
+    )
+    old_status_enum_postgres.create(op.get_bind(), checkfirst=False)
+
+    op.execute(
+        "alter table requests ALTER COLUMN status TYPE transformstatus_ using status::text::transformstatus_"  # noqa;
+    )
+    op.execute("DROP TYPE transformstatus")
+    op.execute("ALTER TYPE transformstatus_ RENAME TO transformstatus")