fix alembic indexes (#2802)

discovery-provider/alembic/versions/37a4458bb72c_fix_alembic_indexes.py

@@ -0,0 +1,52 @@
+"""fix_alembic_indexes
+
+Revision ID: 37a4458bb72c
+Revises: d321f0a00721
+Create Date: 2022-03-31 19:34:35.793844
+
+"""
+from alembic import op
+
+# revision identifiers, used by Alembic.
+revision = "37a4458bb72c"
+down_revision = "d321f0a00721"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    conn = op.get_bind()
+    conn.execute(
+        """
+    BEGIN;
+
+    DROP INDEX IF EXISTS track_id;
+    DROP INDEX IF EXISTS user_id;
+    DROP INDEX IF EXISTS name;
+
+    CREATE INDEX IF NOT EXISTS track_routes_track_id_idx ON track_routes (track_id, is_current);
+    CREATE INDEX IF NOT EXISTS user_events_user_id_idx ON user_events (user_id, is_current);
+    CREATE INDEX IF NOT EXISTS milestones_name_idx ON milestones (name, id);
+
+    COMMIT;
+    """
+    )
+
+
+def downgrade():
+    conn = op.get_bind()
+    conn.execute(
+        """
+    BEGIN;
+
+    DROP INDEX IF EXISTS track_routes_track_id_idx;
+    DROP INDEX IF EXISTS user_events_user_id_idx;
+    DROP INDEX IF EXISTS milestones_name_idx;
+
+    CREATE INDEX IF NOT EXISTS track_id ON track_routes (is_current);
+    CREATE INDEX IF NOT EXISTS user_id ON user_events (is_current);
+    CREATE INDEX IF NOT EXISTS name ON milestones (id);
+
+    COMMIT;
+    """
+    )