db: Add new index

db_repo/versions/005_second_step_generation_index.py

@@ -0,0 +1,30 @@
+from sqlalchemy import Table, MetaData, Index
+
+meta = MetaData()
+
+
+def _get_indices(meta):
+    meta.reflect()
+    Tasks = Table("analyze_tasks", meta, autoload=True, autoload_with=meta.bind)
+    return [
+        Index(
+            "tasks_second_step_idx",
+            Tasks.c.repository_id,
+            Tasks.c.status,
+            Tasks.c.level,
+            Tasks.c.improvement_absolute,
+            Tasks.c.improvement_relative,
+        )
+    ]
+
+
+def upgrade(migrate_engine):
+    meta.bind = migrate_engine
+    for idx in _get_indices(meta):
+        idx.create()
+
+
+def downgrade(migrate_engine):
+    meta.bind = migrate_engine
+    for idx in _get_indices(meta):
+        idx.drop()