Migration for new indexes

lms/migrations/versions/ca27e52b7303_add_missing_indexes.py

@@ -0,0 +1,39 @@
+"""Add missing indexes.
+
+Revision ID: ca27e52b7303
+Revises: f8ff7e49cbbf
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+revision = "ca27e52b7303"
+down_revision = "f8ff7e49cbbf"
+
+
+def upgrade() -> None:
+    # CONCURRENTLY can't be used inside a transaction. Finish the current one.
+    op.execute("COMMIT")
+
+    op.create_index(
+        op.f("ix__assignment_membership_lti_role_id"),
+        "assignment_membership",
+        ["lti_role_id"],
+        unique=False,
+        postgresql_concurrently=True,
+    )
+    op.create_index(
+        op.f("ix__user_h_userid"),
+        "user",
+        ["h_userid"],
+        unique=False,
+        postgresql_concurrently=True,
+    )
+
+
+def downgrade() -> None:
+    op.drop_index(op.f("ix__user_h_userid"), table_name="user")
+    op.drop_index(
+        op.f("ix__assignment_membership_lti_role_id"),
+        table_name="assignment_membership",
+    )