ALTER TABLE practice_exercises ADD COLUMN practice_type_id TEXT NOT NULL DEFAULT 'general';
-- vamp-statement
ALTER TABLE practice_exercises ADD COLUMN practice_type_title TEXT NOT NULL DEFAULT 'General Practice';
-- vamp-statement
ALTER TABLE practice_exercises ADD COLUMN lesson_group_id TEXT NOT NULL DEFAULT 'general';
-- vamp-statement
ALTER TABLE practice_exercises ADD COLUMN lesson_group_title TEXT NOT NULL DEFAULT 'General';
-- vamp-statement
CREATE INDEX idx_practice_exercises_hierarchy ON practice_exercises(practice_type_id, lesson_group_id, source_path, title);